RE: [PATCH] mm: fix page_mkclean_one

[Linus Torvalds]

On Wed, 27 Dec 2006, Chen, Kenneth W wrote:
> > 
> > Running the test code, git bisect points its finger at this commit. Reverting
> > this commit on top of 2.6.20-rc2 doesn't trigger the bug from the test code.
> > 
> >     [PATCH] mm: balance dirty pages
> > 
> >     Now that we can detect writers of shared mappings, throttle them.  Avoids OOM
> >     by surprise.
> 
> Oh, never mind :-(  I just didn't create enough write out pressure when
> test this. I just saw bug got triggered on a kernel I previously thought
> was OK.

Btw, this is an important point - people have long felt that the new page 
balancing in 2.6.19 was to blame, but you've just confirmed the long-held 
suspicion (at least by me) that it's not actually a new bug at all, it's 
just that the dirty page balancing causes writeback to happen _earlier_, 
and thus is better able to _show_ a bug that we've likely had for a long 
long time.

			Linus
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/