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Re: xfs: outstanding patches for 2.6.39

To: Dave Chinner <david@xxxxxxxxxxxxx>
Subject: Re: xfs: outstanding patches for 2.6.39
From: Andi Kleen <andi@xxxxxxxxxxxxxx>
Date: Wed, 23 Mar 2011 00:01:17 -0700
Cc: xfs@xxxxxxxxxxx, aelder@xxxxxxx
In-reply-to: <1300860870-15471-1-git-send-email-david@xxxxxxxxxxxxx> (Dave Chinner's message of "Wed, 23 Mar 2011 17:14:24 +1100")
References: <1300860870-15471-1-git-send-email-david@xxxxxxxxxxxxx>
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.2 (gnu/linux)
Dave Chinner <david@xxxxxxxxxxxxx> writes:

> Of course, the major patch in this series is the conversion of the
> buffer cache to using kmalloc and get_free_page() directly rather
> than using the page cache. This has many benefits and I haven't
> found any regressions due to making that change yet.

One (somewhat obscure) regression will be that you won't be able to
recover from uncorrected memory errors in the buffer cache anymore.
Previously memory_failure() could just drop it transparently when that
happens and the page is currently not used.  This is usually only a
problem if there's significant memory tied up in it.

ak@xxxxxxxxxxxxxxx -- Speaking for myself only

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