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SubjectRe: Still ext2-corruption in test8-pre5 (incl. OOPS)


On Wed, 6 Sep 2000, Udo A. Steinberg wrote:
>
> I'm still experiencing ext2 corruption even with the newest patch
> test8-pre5. I'm not using bugtraq, mutt or pine and I'm fairly sure
> it's not caused by a badly written application or strange input.

Interesting oops.

Basically your "page->buffers" thing seems to be NULL.

Which is certainly interesting. And, thinking about it, quite legal. The
page can have been up-to-date a long time ago, and we ended up pruning the
buffers away in order to be able to free the page later - so when truncate
comes along and wants to look at the buffers they don't exist any more.

This is basically all due to the fact that the new truncate logic does a
"__block_commit_write()" without ever having itself called any of the
routines that establish the buffers (a regular write will always have
called "__block_prepare_write()" first, for example.)

We really should have done a true "block_truncate_write()", but it looked
so clever to just re-use the existing code. Fair enough.

Still willing to test?

Linus

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