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authorChristoph Hellwig <hch@infradead.org>2011-07-26 15:06:44 +0000
committerAlex Elder <aelder@sgi.com>2011-07-26 22:05:48 -0500
commit34951f5cb72b1e3a89a21581cb21e2d5b6a104a4 (patch)
tree79e2b762ef32be642c5b032ec5ad06166f2132de /fs/xfs
parentxfs: encapsulate a block of debug code (diff)
downloadlinux-dev-34951f5cb72b1e3a89a21581cb21e2d5b6a104a4.tar.xz
linux-dev-34951f5cb72b1e3a89a21581cb21e2d5b6a104a4.zip
xfs: flag all buffers as metadata
Now that REQ_META bios aren't treated specially in the CFQ I/O schedule anymore, we can tag all buffers as metadata to make blktrace traces more meaningful. Note that we use buffers also to zero out partial blocks in the preallocation / hole punching code, and while they operate on data blocks the zeros written certainly aren't data. I think this case is borderline metadata enough to not bother special casing it. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
Diffstat (limited to '')
-rw-r--r--fs/xfs/linux-2.6/xfs_buf.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/xfs/linux-2.6/xfs_buf.c b/fs/xfs/linux-2.6/xfs_buf.c
index b2b411985591..d1fe74506c4c 100644
--- a/fs/xfs/linux-2.6/xfs_buf.c
+++ b/fs/xfs/linux-2.6/xfs_buf.c
@@ -1224,6 +1224,9 @@ _xfs_buf_ioapply(
rw = READ;
}
+ /* we only use the buffer cache for meta-data */
+ rw |= REQ_META;
+
next_chunk:
atomic_inc(&bp->b_io_remaining);
nr_pages = BIO_MAX_SECTORS >> (PAGE_SHIFT - BBSHIFT);