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Subject2.4.22/2.4.23 Oops in try_to_free_buffers() on X restart.
> > Got a new kernel oops. Same machine as the previous reported oops
> > in journal_try_to_free_buffers(). Something seems definately wrong
> > in 2.4.23.
> >
> > Marcelo, I'll follow your suggestion te revert a particular change.

The 2.4.23 problems I'm experiencing are not a regression. Patch reversal
didn't solve it and 2.4.22 seems to suffer as well. Somehow RedHat 9 plus
some desktop triggers the problem, almost always when X is started for the
second time the day after the crash (probably some things got paged out in between).

2.4.22 Oops:

aksymoops 2.4.9 on i686 2.4.22-x90. Options used
-V (default)
-k /var/log/ksyms.1 (specified)
-l /proc/modules (default)
-o /lib/modules/2.4.22-x90/ (default)
-m /boot/System.map-2.4.22-x90 (specified)

No modules in ksyms, skipping objects
Dec 24 11:36:57 tornio kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000018
Dec 24 11:36:57 tornio kernel: c013a213
Dec 24 11:36:57 tornio kernel: *pde = 00000000
Dec 24 11:36:57 tornio kernel: Oops: 0000
Dec 24 11:36:57 tornio kernel: CPU: 0
Dec 24 11:36:57 tornio kernel: EIP: 0010:[<c013a213>] Not tainted
Using defaults from ksymoops -t elf32-i386 -a i386
Dec 24 11:36:57 tornio kernel: EFLAGS: 00010217
Dec 24 11:36:57 tornio kernel: eax: 00000000 ebx: c11795a0 ecx: 000001d0 edx: 00000000
Dec 24 11:36:57 tornio kernel: esi: 00000000 edi: c2bb75d8 ebp: c11cbf1c esp: c11cbf0c
Dec 24 11:36:57 tornio kernel: ds: 0018 es: 0018 ss: 0018
Dec 24 11:36:57 tornio kernel: Process kswapd (pid: 4, stackpage=c11cb000)
Dec 24 11:36:57 tornio kernel: Stack: c11795a0 000001d0 0000001d c11795a0 c11cbf2c c0138690 c2bb75d8 c11795a0
Dec 24 11:36:57 tornio kernel: c11cbf60 c012f512 c11795a0 000001d0 00000020 000001d0 00000020 00000020
Dec 24 11:36:57 tornio kernel: c11ca000 00000062 000003d5 000001d0 c03b2ad4 c11cbf84 c012f765 00000006
Dec 24 11:36:57 tornio kernel: Call Trace: [<c0138690>] [<c012f512>] [<c012f765>] [<c012f7cc>] [<c012f8e2>]
Warning (Oops_read): Code line not seen, dumping what data is available


>>EIP; c013a213 <try_to_free_buffers+13/10c> <=====

Trace; c0138690 <try_to_release_page+48/54>
Trace; c012f512 <shrink_cache+1e6/2fc>
Trace; c012f765 <shrink_caches+55/84>
Trace; c012f7cc <try_to_free_pages_zone+38/5c>
Trace; c012f8e2 <kswapd_balance_pgdat+4e/a0>


Notice that both journal_try_to_free_buffers() and this time
try_to_free_buffers() is Oopsing.


--
Frank
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