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SubjectRe: Linux-2.5.14..
On Mon, 6 May 2002, Linus Torvalds wrote:
> On Mon, 6 May 2002, Daniel Pittman wrote:
>> From the look of the changelog at least a few of the file corruption
>> bugs with ext3, 2k block file systems and 2.5 have been fixed. Should
>> I expect this release to address the problems I was seeing?
> "Expect" is too strong a word. I'd say "hope" - a number of truncate
> bugs were fixed, but whether that was what bit you, nobody knows.
> I suspect the real answer is that we'd love for you to test things
> out, but that if it ends up being too painful to recover if the
> problems happen again, you probably shouldn't..

Right. I got brave enough to test it on a real, live system after
extensive fake testing. It seems to work well, at least so far as
running the same workload that cause massive file corruption correctly.

So, I believe that 2.5.14 is working correctly with 2k ext3 filesystems,
at least for minimal use. I didn't do any sort of extreme load testing
or anything like that, being cautious about it.

On reboot, I got an assertion in ext3, though, and the following BUG
trace. So, something still isn't well, but it seems to be getting it
much more right. :)


ksymoops 2.4.5 on i686 2.5.6. Options used
-V (default)
-k /proc/ksyms (default)
-l /proc/modules (default)
-o /lib/modules/2.5.6/ (default)
-m /boot/ (specified)

Error (regular_file): read_ksyms stat /proc/ksyms failed
No modules in ksyms, skipping objects
No ksyms, skipping lsmod
Invalid Operand: 0000
CPU: 0
EIP: 0010:[<c015cf45>] Not Tainted
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010286
EAX: 00000061 EBX: dc883900 ECX: c14ee080 EDX: df954ca0
ESI: dd36d200 EDI: dfd53600 EBP: d0d805c0 ESP: c14f1e6c
DS: 0018 ES: 0018 SS: 0018
Stack: c02c0060 c02c04e1 c02c0040 00000460 c02c0537 d2821380 d0d805c0 00000000
c14f1f04 c01557fd d0d805c0 d2821380 d2821380 00000800 d2821380 00000800
00000800 000000c0 c015555c d0d805c0 d2821380 0005f700 00000000 bfd71c00
Call Trace: [<c01557fd>] [<c015555c0>] [<c0155909>] [<c01557e4>] [<c0126bab>]
[<c01535fa>] [<c0132576>] [<c0106c97>]
Code: 0f 0b 60 04 40 00 2c c0 83 c4 14 6a 03 8b 45 00 50 53 e8 1c

>>EIP; c015cf45 <journal_dirty_metadata+13d/174> <=====

>>EBX; dc883900 <END_OF_CODE+1c4d838c/????>
>>ECX; c14ee080 <END_OF_CODE+1142b0c/????>
>>EDX; df954ca0 <END_OF_CODE+1f5a972c/????>
>>ESI; dd36d200 <END_OF_CODE+1cfc1c8c/????>
>>EDI; dfd53600 <END_OF_CODE+1f9a808c/????>
>>EBP; d0d805c0 <END_OF_CODE+109d504c/????>
>>ESP; c14f1e6c <END_OF_CODE+11468f8/????>

Trace; c01557fd <commit_write_fn+19/5c>
Trace; c015555c0 <END_OF_CODE+b411aa04c/????>
Trace; c0155909 <ext3_commit_write+c9/1e4>
Trace; c01557e4 <commit_write_fn+0/5c>
Trace; c0126bab <generic_file_write+4c3/6e4>
Trace; c01535fa <ext3_file_write+46/4c>
Trace; c0132576 <sys_write+96/f0>
Trace; c0106c97 <syscall_call+7/b>

Code; c015cf45 <journal_dirty_metadata+13d/174>
00000000 <_EIP>:
Code; c015cf45 <journal_dirty_metadata+13d/174> <=====
0: 0f 0b ud2a <=====
Code; c015cf47 <journal_dirty_metadata+13f/174>
2: 60 pusha
Code; c015cf48 <journal_dirty_metadata+140/174>
3: 04 40 add $0x40,%al
Code; c015cf4a <journal_dirty_metadata+142/174>
5: 00 2c c0 add %ch,(%eax,%eax,8)
Code; c015cf4d <journal_dirty_metadata+145/174>
8: 83 c4 14 add $0x14,%esp
Code; c015cf50 <journal_dirty_metadata+148/174>
b: 6a 03 push $0x3
Code; c015cf52 <journal_dirty_metadata+14a/174>
d: 8b 45 00 mov 0x0(%ebp),%eax
Code; c015cf55 <journal_dirty_metadata+14d/174>
10: 50 push %eax
Code; c015cf56 <journal_dirty_metadata+14e/174>
11: 53 push %ebx
Code; c015cf57 <journal_dirty_metadata+14f/174>
12: e8 1c 00 00 00 call 33 <_EIP+0x33> c015cf78 <journal_dirty_metadata+170/174>

1 error issued. Results may not be reliable.

The artistic temperment is a disease which afflicts amateurs.
-- G. K. Chesterton, _Heretics_, 1905
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