linux-kernel - [PATCH v2 0/3] Fix more NFS readdir regressions

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Message-Id: <1291217804-11257-1-git-send-email-Trond.Myklebust@netapp.com>
Date:	Wed,  1 Dec 2010 10:36:41 -0500
From:	Trond Myklebust <Trond.Myklebust@...app.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Nick Bowler <nbowler@...iptictech.com>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-nfs@...r.kernel.org
Subject: [PATCH v2 0/3] Fix more NFS readdir regressions

> OK. The first patch in this series fixes the regression reported by
> Nick Bowler when I apply it to my setup.

> The 2 remaining patches are needed in order to ensure that the
> VM doesn't free the readdir page cache page while we're trying to
> read from it, and to ensure that we don't leak memory...

> Linus, please don't apply these patches quite yet. I'd like to continue
> tests for a couple more days before I send you the pull request.

v2 fixes the following issues:
 - Fix up the cookie usage in uncached_readdir()
 - Changelog fixups for the second patch
 - .releasepage should use kmap_atomic() so that it can be called
   from all direct reclaim contexts.
 - Ensure that .releasepage also clears Pg_uptodate
 - Set/clear the Pg_private flag to ensure .releasepage gets called when
   appropriate.
 - Add a .invalidatepage to ensure truncate_inode_pages() works correctly
 - Ensure that the anonymous page that is generated by uncached_readdir()
   doesn't leak memory.

Trond Myklebust (3):
  NFS: Ensure we use the correct cookie in nfs_readdir_xdr_filler
  NFS: lock the readdir page while it is in use
  NFS: Fix a memory leak in nfs_readdir

 fs/nfs/dir.c           |   48 ++++++++++++++++++++++++++++++++++++++++--------
 fs/nfs/inode.c         |    1 +
 include/linux/nfs_fs.h |    1 +
 3 files changed, 42 insertions(+), 8 deletions(-)

-- 
1.7.3.2

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