Prev: CRED: Holding a spinlock does not imply the holding of RCU read lock
Next: [PATCH 1/1] Bug in hidraw When a HID Device Contains Multiple Reports
From: Andrea Arcangeli on 26 Apr 2010 19:10
On Mon, Apr 26, 2010 at 11:37:56PM +0100, Mel Gorman wrote:
> The other issues raised about expand_downwards will need to be re-examined to
> see if they still exist and transparent hugepage support will need further
> thinking to see if split_huge_page() can deal with these situations.
So patch 1 is for aa.git too, and patch 2 is only for mainline with
the new anon-vma changes (patch 2 not needed in current aa.git, and if
I apply it, it'll deadlock so...) right?
split_huge_page is somewhat simpler and more strict in its checking
than migrate.c in this respect, and yes patch 2 will also need to be
extended to cover split_huge_page the moment I stop backing out the
new anon-vma code (but it won't be any different, whatever works for
migrate will also work for split_huge_page later).
For now I'm much more interested in patch 1 and I'll leave patch 2 to
mainline digestion and check it later hope to find all issues fixed by
the time transparent hugepage gets merged.
About patch 1 it's very interesting because I looked at the race
against fork and migrate yesterday and I didn't see issues but I'm
going to read your patch 1 in detail now to understand what is the
problem you're fixing.
Good you posted this fast, so I can try to help ;)
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo(a)vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/