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SubjectRe: Can someone confirm ext4 BUG_ON on latest kernel build?
[adding ext4 mailing list]


On Sun, 19 Jun 2011 10:13:52 +0000 halfdog wrote:

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> Sorry, I do not have latest kernel. Can someone confirm this on latest?
> At least bugtracker does not know about it, and to my understanding of
> source, should be still here.
>
>
> dd if=/dev/zero bs=1M count=64 of=test
> mkfs.ext4 -F test
> echo -n " " | dd of=test bs=1 count=1 seek=297195 conv=notrunc
> mount -o loop test /mnt/test
> dmesg -c
>
> On ubuntu natty with latest kernel, it seems, that
> fs/ext4/super.c:__save_error_info calls mod_timer before timer->function
> is set at end of fs/ext4/super.c:ext4_fill_super via
> sbi->s_err_report.function = print_daily_error_info;
>
> This causes BUG_ON(!timer->function) in kernel/timer.c:__mod_timer
> Device is stuck, not usable any more.
>
> Thanks
>
> - --
> http://www.halfdog.net/
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---
~Randy
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