Commit 34951f5c authored Jul 26, 2011 by Christoph Hellwig Committed by Alex Elder Jul 26, 2011

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>

parent 1c4f3329

fs/xfs/linux-2.6/xfs_buf.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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);