1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"
"http://www.w3.org/TR/REC-html40/loose.dtd">
<html>
<head>
<meta content="text/html; charset=iso-8859-1" http-equiv="Content-Type">
<title>The Current TODO list</title>
</head>
<body alink="#FF0000" vlink="#55188A" link="#0000EF" bgcolor="#FFFFFF" text="#000099">
<table border="0">
<tr align="left">
<td valign="top">
<table border="0">
<tr align="left"><td valign="top" >
<img src="http://user-mode-linux.sourceforge.net/uml-small.png" height="171" width="120"/>
</td></tr>
<tr align="left"><td valign="top" bgcolor="#e0e0e0">
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/index.html">Site Home Page</a></font>
<br>
<font size="-1"><a href="http://uml.harlowhill.com">The UML Wiki</a></font>
<br>
<font size="-1"><a href="http://usermodelinux.org">UML Community Site</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/roadmap.html">The UML roadmap</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/uses.html">What it's good for</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/case-studies.html">Case Studies</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/kernel.html">Kernel Capabilities</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/dl-sf.html">Downloading it</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/run.html">Running it</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/compile.html">Compiling</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/install.html">Installation</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/skas.html">Skas Mode</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/patches.html">Incremental Patches</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/tests.html">Test Suite</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/devanon.html">Host memory use</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/fs_making.html">Building filesystems</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/faq.html">Troubles</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/contrib.html">User Contributions</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/links.html">Related Links</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/todo.html">The ToDo list</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/projects.html">Projects</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/diary.html">Diary</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/thanks.html">Thanks</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/contacts.html">Contacts</a></font>
</td></tr>
<tr align="left"><td valign="top" bgcolor="#e0e0e0">Tutorials<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/UserModeLinux-HOWTO.html">The HOWTO (html)</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/UserModeLinux-HOWTO.txt">The HOWTO (text)</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/hostfs.html">Host file access</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/input.html">Device inputs</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/shared_fs.html">Sharing filesystems</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/fs.html">Creating filesystems</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/resize.html">Resizing filesystems</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/networking.html">Virtual Networking</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/mconsole.html">Management Console</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/debugging.html">Kernel Debugging</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/honeypots.html">UML Honeypots</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/gprof.html">gprof and gcov</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/xtut.html">Running X</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/trouble.html">Diagnosing problems</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/config.html">Configuration</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/slack_readme.html">Installing Slackware</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/arch-port.html">Porting UML</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/iomem.html">IO memory emulation</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/2G-2G.html">UML on 2G/2G hosts</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/lksct/index.html">Adding a UML system call</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/nesting.html">Running nested UMLs</a></font>
</td></tr>
<tr align="left"><td valign="top" bgcolor="#e0e0e0">How you can help<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/help-gen.html">Overview</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/help-doc.html">Documentation</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/help-userspace.html">Utilities</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/help-kernel-v1.html">Kernel bugs</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/projects.html">Kernel projects</a></font>
</td></tr>
<tr align="left"><td valign="top" bgcolor="#e0e0e0">Screenshots<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/net.html">A virtual network</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/x.html">An X session</a></font>
</td></tr>
<tr align="left"><td valign="top" bgcolor="#e0e0e0">Transcripts<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/login.html">A login session</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/debug-session.html">A debugging session</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/slackinst.html">Slackware installation</a></font>
</td></tr>
<tr align="left"><td valign="top" bgcolor="#e0e0e0">Reference<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/switches.html">Kernel switches</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/slack_readme.html">Slackware README</a></font>
</td></tr>
<tr align="left"><td valign="top" bgcolor="#e0e0e0">Papers<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/als2000/index.html">ALS 2000 paper (html)</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/als2000.tex">ALS 2000 paper (TeX)</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/slides/als2000/slides.html">ALS 2000 slides</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/slides/lca2001/lca.html">LCA 2001 slides</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/slides/ols2001/index.html">OLS 2001 paper (html)</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/ols2001.tex">OLS 2001 paper (TeX)</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/als2001/index.html">ALS 2001 paper (html)</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/als2001.tex">ALS 2001 paper (TeX)</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/slides/ists2002/umlsec.htm">UML security (html)</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/slides/lca2002/lca2002.htm">LCA 2002 (html)</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/slides/wvu2002/wvu2002.htm">WVU 2002 (html)</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/slides/ists_rt/ists_rt.htm">Security Roundtable (html)</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/slides/ols2002/ols2002.html">OLS 2002 slides</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/slides/lwe2005/LWE2005.html">LWE 2005 slides</a></font>
</td></tr>
<tr align="left"><td valign="top" bgcolor="#e0e0e0">Fun and Games<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/cgi-bin/hangman">Kernel Hangman</a></font>
<br>
<font size="-1"><a href="http://user-mode-linux.sourceforge.net/sdotm.html">Disaster of the Month</a></font>
</td></tr>
</table>
</td>
<td valign="top" align="left">
<center>
<h3>The Current TODO list</h3>
</center>
Since about Feb 2001, I've been maintaining a TODO list and posting it to the
devel list occasionally.
<table width="100%" bgcolor="#e0e0e0">
<tr>
<td>
<b>
<font color="black"> Not done </font>
</b>
</td>
</tr>
</table>
<br>
<b>Packaging</b>
<br>
<blockquote></blockquote>
<br>
<b>Functionality</b>
<br>
<blockquote></blockquote>
<br>
<b>Bugs</b>
<br>
<blockquote>
<p>
My attempts to run the Debian install procedure hung UML while it was
probing disks. I never figured out what was happening.
<p>
Make UML build without warnings
<p>
Make sure that each clock tick gets counted
<p>
Figure out the hostfs crash that Larent Bonnaud is seeing
<p>
make 'gdb=pty' work
<p>
protect kernel memory from userspace
<p>
Figure out why the io_thread loses its parent and its connection to the kernel
<p>
Disable SIGIO on file descriptors which are already being handled.
This will cut off some interrupt recursion.
<p>
Figure out why gdb can't use fd chan (blinky@gmx.net)
<p>
Figure out why repeated 'tail /dev/zero' with swap causes process segfaults
<p>
Set SA_RESTART on SIGPROF
<p>
Replace dentry_name with d_name
<p>
Dynamically allocate all driver descriptors
<p>
Make slip_tramp conditional in slip_close
<p>
many du / causes slab cache corruption
<p>
Adding an eth device via the mconsole (and probably the command line)
won't necessarily configure the device that was named
<p>
Figure out why init/version.c, init/main.c, and arch/um/main.c don't
get coverage data.
<p>
Fix the ubd rounding bug spotted by Steve Schmidtke and Roman Zippel.
<p>
gdb should be the last thing to be shut down so that breakpoints can
be set late in the shutdown process.
<p>
Have the __uml_exitcall handlers check to see if they need to do anything.
<p>
Find the race that causes the kernel to run before the debugger is running,
and which then causes a panic and segfault.
<p>
Tests that need writing
<ul>
<li>
Build and load some modules to check for unexported symbols
</li>
<li>
Swap testing - qsbench, low-memory kernel build
</li>
<li>
Rerun some existing tests through hostfs
</li>
</ul>
<p>
Figure out why gdb inside UML sometimes misses breakpoints.
<p>
^C doesn't work well in a busy loop in __initcall code. I've seen the
process die with a SIGINT as well as have the SIGINT arrive to a
sleeping process, panicing the tracing thread.
<p>
When setting a conditional breakpoint on __free_pages in
free_all_bootmem_core and continuing, UML hangs.
<p>
Figure out what to do with __uml_setup in modules. A lot of these should
end up being normal __setup, since they don't have to happen before the
kernel runs.
<p>
Figure out why UML died nastily after ^C-ing it and hitting it in userspace.
<p>
Telnetting to a console when in.telnetd is non-executable produces an
error and a crash from a sleeping process segfaulting.
<p>
Single-stepping when a signal has arrived doesn't work. gdb
singlesteps, sees the signal, and single-steps with the signal. The
signal is handled immediately, stepping the process into the handler.
The original instruction was never executed, so when gdb puts the
breakpoint back and the handler returns, the breakpoint is hit again.
<p>
The _to_user routines refer to user data without using copy_to_user.
<p>
How to cause a strange userspace segfault - run the new UML inside UML
under gdb. Put a breakpoint on create_elf_tables. 'finish', 'next',
segfault.
<p>
With an old port-helper hanging on to a port, running a UML which want those
ports causes all of the consoles and serial lines to output their login
prompts to stdout.
<p>
Assigning console and serial line devices to files doesn't work cleanly.
<p>
Make sure that irqs are deactivated or freed when their descriptors are
closed.
<p>
Things to audit:
<ul>
<li>
Make sure that destructors exactly undo everything the constructor does
</li>
<li>
Set FD_CLOEXEC on any descriptors that don't need to be passed across execs.
</li>
<li>
Make sure any protocols are 64-bit clean - this means not using ints, longs,
etc. Also, maybe enums are bad.
</li>
</ul>
<p>
port_kern.c has port_remove_dev and port_kern_free which do almost the
same things.
<p>
Make sure that return values are actually used.
<p>
skas4 things - remove the extra two context switches per system call,
make sure it compiles with CONFIG_PROC_MM off, implement the mm
indirector, move PTRACE_LDT to /dev/mm, fix PTRACE_FAULTINFO to return
trap type and err, allow the environment, argument, etc pointers of an
mm to be set.
</blockquote>
<br>
<b>Confirm fix</b>
<br>
<blockquote>
<p>
Get either Myrtal Meep or Matt Clay
to confirm (or not) that they can no longer crash UML with
Apache/Perl/MySQL. This will probably be fixed with the new network drivers.
</blockquote>
<table width="100%" bgcolor="#e0e0e0">
<tr>
<td>
<b>
<font color="black"> Done </font>
</b>
</td>
</tr>
</table>
<br>
<b>Packaging</b>
<br>
<blockquote>
<p>
Put together a UML deb builder
<p>
Figure out how to ship the UML test suite
<p>
Figure out how to make a module tar
file with the right structure
<p>
It currently sucks. What I want is an RPM and a deb for each release
containing:
<ul>
<li>the kernel</li>
<li>HOWTO</li>
<li>user-mode network tools</li>
<li>test harness</li>
<li>test suite</li>
<li>maybe a small root filesystem like the tomsrtbt</li>
<li>modules</li>
<li>mkrootfs</li>
</ul>
Anything else? I also need suggestions for locations for all these things.
</blockquote>
<br>
<b>Functionality</b>
<br>
<blockquote>
<p>
Add a mechanism for rereading module symbols when the module is reloaded.
<p>
Integrate Greg Lonnon's I/O space emulation
<p>
Make the socket channel work
<p>
Figure out what to do
about the network driver. There are duelling drivers from Jim Leu and
Lennert Buytenhek, and I need to figure out how to merge the best bits from
them into a single driver, or split them into two very distinct drivers.
<p>
Extract Patrick Schaaf's cool new block driver from him.
<p>
Remove the tty mode save/restore from main and put it in the file descriptor
channel code. (Boria Feigin)
<p>
Added more stuff to
/proc/cpuinfo (mistral)
<p>
Allow gdb to be attached to a
host device in the same way that consoles and serial lines can
<p>
modify_ldt implemented
(patch from Lennert Buytenhek)
<p>
Add support for root hostfs
<p>
Added --help (patch from
Yves Rougy)
</blockquote>
<br>
<b>Bugs</b>
<br>
<blockquote>
<p>
I occasionally see one of the loggers
dying from a SIGTERM during boot because of a kill that's somehow directed
at the wrong process.
<p>
I need to figure out why some people
see 'Unexpectedly got signal 4 in signals'. This has been reported a
couple of times, but I've never got any information that would help me
debug it.
<p>
Implement copy_{from,to}_user using
setjmp/longjmp.
<p>
Fix gcov and gprof support
<p>
Figure out why the umn device won't serve more than one packet to remote machines.
<p>
Figure out how to make
-D_FILE_OFFSET_BITS=64 work with modules (fix from Lennert which explicitly
uses the *64 interfaces)
<p>
Figure out why ^S and ^Q don't work on the console (patch from Livio)
<p>
Stop the hangs caused by someone disconnecting from a virtual console
<p>
umn needs to destroy the slip device
when it's no longer needed (JS)
<p>
clean up the umn_set_addr logic
<p>
Make sure that readonly hostfs really
is readonly (James McMechan)
<p>
Figure out the wait_for_page hangs
<p>
I used to see syslog occasionally hang,
but haven't in a long time. It happened again, and it turns out I was
enabling signals when they shouldn't be, allowing the timer to interrupt a
sensitive part of do_IRQ.
<p>
gdb doesn't find the kernel if it isn't called 'linux' (Brian J. Murrell)
<p>
Have the ubd driver figure out the
block device size with BLKGETSIZE if necessary (Lennert Buytenhek, marc)
<p>
Make sure it boots in the presence of IO
redirection and piping (JS)
<p>
Rebooting a UML under debug won't kill the old gdb
<p>
Remove assumption that argv is
contiguous (Boria Feigin)
<p>
Have hostfs copy user data with
copy_{to,from}_user.
<p>
Put in Lennert's utsname patch
(Lennert Buytenhek)
<p>
Put in Lennert's ubd LFS patch
(Lennert Buytenhek)
<p>
The kernel shouldn't hang when debug is
requested and it wasn't compiled with CONFIG_PT_PROXY.
<p>
Make empty_zero_page and empty_bad_page
reserved (Rik)
<p>
Increase COMMAND_LINE_SIZE to something
bigger (JS)
<p>
Put breakpoints on panic and stop
<p>
Make hostfs figure out external filenames
by walking up the dentry->parent tree rather than having inodes store them.
<p>
Figure out why hostfs misses files in large
directories
<p>
Make sure init can exec (Al Viro)
<p>
Fix the problems that mistral is
seeing. This is three bugs - the sleep hang, a bug in
sigio_handler (both fixed), plus the sigreturn bug.
<p>
Reimplement process signal delivery to
eliminate the race when the process handler returns
<p>
Various fixes and cleanups in hostfs (Al Viro)
<p>
Remove real_mm from thread and replace
it with some unused pte bits
<p>
Fix /proc/cmdline
(prose from Henrik Nordstrom, code from Greg Lonnon)
<p>
drivers Makefile cleanup
(patch from Greg Lonnon)
<p>
tty_flip_buffer_push fixlet patch
from (Gordon McNutt)
<p>
The ubd device should reset openflags between mounts (jfreak)
<p>
Figure out the sleep hang. It
happens rarely. Somehow, irq_desc[0].flags gets stuck at 5 which tells do_IRQ
that the interrupt is already being handled.
<p>
Stop ^C in gdb from segfaulting processes if it hits in userspace.
<p>
Figure out why swapping causes
process segfaults and nasty mm messages.
<p>
Fix the build so that modules_install
drops modules in the proper hierarchy (fix from Henrik Nordstrom)
<p>
Got rid of hostfs_llseek (patch from
stewart and Henrik Nordstrom)
<p>
gdb now ignores SIGWINCH. (patch
from James Stevenson)
<p>
Fixed ubd stats (patch from James Stevenson)
<p>
UML should run on kernels with
a 2G/2G address space split (blinky) <p>
Fix the segv bug where
a --x page is never fixed because thread.starting_exec is set (mistral) -
mistral hasn't complained about this in ages
<p>
Fix 'cat /proc/kmsg' (Torsten Fink)
<p>
Fix crash if someone types at the console too soon (patch from mistral)
<p>
Change __SMP__ to CONFIG_SMP (Niels Kristian Bech Jensen)
<p>
Include config.h where necessary (Niels Kristian Bech Jensen)
<p>
Fix a couple allocation buglets in hostfs (Henrik Nordstrom)
<p>
Implement internal system calls correctly (Roman Zippel)
<p>
Allow the time to be changed (Frank Klingenhoefer) (patch from Livio Soares)
<p>
The ptrace proxy should handle wait correctly for non-UML subprocesses of gdb
<p>
Figure out why UML flunks the f00f test
<p>
Make the build work when CONFIG_MCONSOLE is
off
<p>
Provide some kind of reasonable error
message when the root filesystem isn't writable.
<p>
Figure out why hostfs panics when it's on an nfs directory on the host
(David Coulson)
<p>
Remove the chdir from the umid setup
<p>
Figure out why the .deb build fails
checksumming - it was because hostfs reads went through the page cache
and writes bypassed it
<p>
Figure out why diffing identical kernel
pools produces diffs - can't reproduce this, so I have to assume that it's
fixed somehow
<p>
Make sure that gdbs get killed properly
<p>
Stop dev_ip_addr from crashing if the
interface has no IP addresses
<p>
Figure out why the Debian ping is slower than the Slackware ping
<p>
set_umid should only set the umid
<p>
COW headers should have absolute pathnames
in them or backing file path names should be possibly relative to the COW
file's directory
<p>
Figure out why some early breakpoints don't
work. I.e. Setting a bp in do_initcalls or bdflush and continuing from
start_kernel misses the bp, but continuing from rest_init hits it.
<p>
Print out a decent error message when mcast setup fails because there
are no multicast devices on the host
<p>
Suppress the error message from uml_net when route fails because
there's no eth0 on the host
<p>
See if it's possible to have uml_net know when an eth device changes
its IP address.
<p>
Figure out why apt-get install ntp crashes UML.
<p>
Version the mconsole and uml_router interfaces
<p>
Fix the error messages when a backing file doesn't exist, and also when the
COW file exists, but is empty.
<p>
Put -fno-common back
<p>
Fix gdb
<p>
Fix daemonized operation
<p>
Implement thread_saved_pc
<p>
Run sysrq stuff in interrupt context
<p>
Make it possible to ^Z and bg UML
<p>
Make core dumping work
<p>
many du / causes process segfaults
<p>
ddd doesn't work with gdb-pid
<p>
Removing a block device with the mconsole doesn't remove its entry in
/proc/partitions
<p>
Removing ethertap or TUN/TAP eth devices produces odd error messages in
UML
<p>
Figure out why running UML under an identical UML hangs the outer one
<p>
Figure out why running a properly built UML under UML doesn't work
<p>
gdbs aren't getting killed properly again
<p>
Setting up a tuntap interface with no gate address will hang UML when
the interface is brought up
<p>
Figure why processes segfault under extreme load, like a 'make -j'
kernel build
<p>
Figure out why leaning on the space bar when top is running causes an FPE.
<p>
Figure out how to let arches ifdef out PTRACE_[SG]ETREGS
<p>
Put UML temporary files (except maybe the mmap files) in the user's
home directory.
<p>
Fix the bogomips calculation.
<p>
Figure out how to implement thread private pages.
<p>
Figure out why ^S and ^Q don't work on the console (phillips)
<p>
When a non-root ubd device is COWed, the bitmap isn't mapped in for some
reason.
<p>
The mconsole driver should support C-A-D if it doesn't already.
<p>
'i reg' to gdb inside UML doesn't print the fp registers
<p>
Improve the formatting when a error message is returned from uml_net,
i.e. when TUN/TAP is requested, but uml_net doesn't support TUN/TAP.
<p>
Get the fp registers in core files correctly.
<p>
gdb should be able to see ^C immediately
<p>
Byte-swap the ubd bitmap (Roman Zippel)
<p>
The register state in the sigcontext passed in to a signal handler should
be copied into the process registers when the handler returns.
<p>
When UML halts, any external debugger needs to be told that it exited so
it doesn't get confused about the child suddenly disappearing.
<p>
setup_stack should use copy_to_user.
<p>
Using strace as an external debugger doesn't work. strace sees no system
calls starting at the delay calibration.
<p>
When a new COW file is created and the backing file doesn't exist, the
error message implies the COW file doesn't exist, plus the COW file is
created with size 0.
<p>
mconsole clients need to pass absolute pathnames into UML.
<p>
Make sure there are no references to errno in kernel code
<p>
Complain when a channel type is requested but not configured in
<p>
Get the tracing thread out of the business of running trampolines
<p>
disable_chan needs to free up all SIGWINCH info so that logging out of
a port console doesn't produce nasty-looking errors.
Also the woody filesystem produces nasty errors when logging in through
telnet.
<p>
close_chan should call free_irq, not free_irq_by_fd
<p>
Running the ists debian fs with devfs=nomount produces a 'Freeing free IRQ'.
<p>
Look at the initrd dependencies. UML doesn't compile when initrd support
is disabled.
<p>
Multiple opens of a pty console cause irq registrations to pile up.
<p>
Sanity-check arguments in the network *setup routines. Ethertap in
particular needs checking. dev->user should remain NULL if there's
an error. Also sanity-checking in uml_net is needed.
<p>
The uml_net entry points should check their argcs.
<p>
Figure out why large pastes into consoles get truncated.
<p>
'next' across a statement which segfaults causes wait_for_stop to get
confused by the segfault.
<p>
Make sure "none" is commutative with the other channel initializations.
<p>
It's still possible for disconnecting from a UML console to put that
device into an infinite poll loop after it's closed.
<p>
Giving the wrong pid to gdb-pid causes a horrible crash.
<p>
In gdb inside UML, putting a breakpoint on a int 0x80 causes the system
call not to happen.
<p>
Breakpoints don't work in the trivial statically linked getpid program.
PTRACE_SINGLESTEP appears not to be working.
<p>
Figure out why, when there are more telnet connections to UML consoles
than there are consoles, when one is freed up, the next telnet connection
only wakes up when something else causes an interrupt.
<p>
Figure out where the occasional 'end!=nsectors' message is coming from.
<p>
Setting up ethertap on 2.2 causes uml_net to spit out an infinite
stream of -EBADF.
<p>
Configuring a device twice with uml_mconsole apparently succeeds and
leaves it unusable.
<p>
Configuring a disk to a non-existant file with uml_mconsole apparently
succeeds and leaves it unusable.
<p>
I built UML inside itself twice on hostfs, with the output going to a
log. The first failed, and when the second ran, the log filled with
garbage.
<p>
The xtime lock should disable interrupts.
</blockquote>
<br>
<b>Confirm fix</b>
<br>
<blockquote>
<p>
Someone needs to try booting UML as a diskless client via bootp and
make sure that it works.
<p>
I have a bug that says that diskless booting doesn't work because it's
impossible to assign an address to a network interface from the
command line. However, I've heard of someone booting diskless
successfully, so this needs to be cleared up.
<p>
I have an old bug that claims that UML can be crashed with a ping
flood. I haven't seen this happen recently, so if anyone else has,
you'd better let me know.
<p>
Larent Bonnaud claimed a while ago that upgrading a Debian filesystem
hung the kernel. I need to know if this is still a problem.
<p>
Get Rik van Riel to confirm that UML no longer loses
characters that he types at the console. Rik says he hasn't seen it
in a while, mistral confirms.
</blockquote>
</td>
</tr>
</table>
<center>
<font size="-1">Hosted at </font>
<a href="http://sourceforge.net">
<img src="http://sourceforge.net/sflogo.php?group_id=429" width="88" height="31" border="0" alt="SourceForge Logo">
</a>
</center>
</body>
</html>
|
