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From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Wed, 19 Oct 2011 06:39:55 -0700
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Subject: Re: kernel 3.0: BUG: soft lockup: find_get_pages+0x51/0x110
To: Mel Gorman <mgorman@suse.de>
Cc: Hugh Dickins <hughd@google.com>, Andrea Arcangeli <aarcange@redhat.com>,
        Pawel Sikora <pluto@agmk.net>,
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On Wed, Oct 19, 2011 at 12:43 AM, Mel Gorman <mgorman@suse.de> wrote:
>
> My vote is with the migration change. While there are occasionally
> patches to make migration go faster, I don't consider it a hot path.
> mremap may be used intensively by JVMs so I'd loathe to hurt it.

Ok, everybody seems to like that more, and it removes code rather than
adds it, so I certainly prefer it too. Paweł, can you test that other
patch (to mm/migrate.c) that Hugh posted? Instead of the mremap vma
locking patch that you already verified for your setup?

Hugh - that one didn't have a changelog/sign-off, so if you could
write that up, and Paweł's testing is successful, I can apply it...
Looks like we have acks from both Andrea and Mel.

                  Linus