[xfs-masters] [Bug 27002] kernel bug when mounting xfs partition

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=27002





--- Comment #8 from Dave Chinner <david at fromorbit.com>  2011-01-31 10:24:55 ---
(In reply to comment #7)
> I am curious, how do you know i hit that BUG_ON.

Because the dmesg output from 2.6.37 you posted has this:

kernel BUG at mm/vmalloc.c:947

As the first line, and I posted line 947 of mm/vmalloc.c from a 2.6.37 kernel.
;)

> And if i may ask, before i send e-mail, are you sure this is VM component
> problem ?
> since :
> - regressing with that patch fix the problem.

Sure - you stopped XFS from using the path in the VM that is falling over.

> - this problem not occuring on other filesystem i tested, which is ext3, and
> reiserfs.

Neither of which use the vm_map_ram() interface, so won't be exercising the
problematic code path in the VM....

Cheers,

Dave.

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