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authorDave Chinner <dchinner@redhat.com>2012-04-23 15:58:56 +1000
committerBen Myers <bpm@sgi.com>2012-05-14 16:20:52 -0500
commitaa5c158ec97bd4014f47a2bc0150fb6b20e6c48b (patch)
tree8c79791167a5d659949952ad11a08ce325eb025c /fs/xfs/xfs_vnodeops.c
parent7ca790a507a9288ebedab90a8e40b9afa8e4e949 (diff)
downloadop-kernel-dev-aa5c158ec97bd4014f47a2bc0150fb6b20e6c48b.zip
op-kernel-dev-aa5c158ec97bd4014f47a2bc0150fb6b20e6c48b.tar.gz
xfs: kill XBF_DONTBLOCK
Just about all callers of xfs_buf_read() and xfs_buf_get() use XBF_DONTBLOCK. This is used to make memory allocation use GFP_NOFS rather than GFP_KERNEL to avoid recursion through memory reclaim back into the filesystem. All the blocking get calls in growfs occur inside a transaction, even though they are no part of the transaction, so all allocation will be GFP_NOFS due to the task flag PF_TRANS being set. The blocking read calls occur during log recovery, so they will probably be unaffected by converting to GFP_NOFS allocations. Hence make XBF_DONTBLOCK behaviour always occur for buffers and kill the flag. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Mark Tinguely <tinguely@sgi.com> Signed-off-by: Ben Myers <bpm@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_vnodeops.c')
-rw-r--r--fs/xfs/xfs_vnodeops.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c
index 8f99c77..6c18745 100644
--- a/fs/xfs/xfs_vnodeops.c
+++ b/fs/xfs/xfs_vnodeops.c
@@ -82,7 +82,7 @@ xfs_readlink_bmap(
byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount);
bp = xfs_buf_read(mp->m_ddev_targp, d, BTOBB(byte_cnt),
- XBF_MAPPED | XBF_DONT_BLOCK);
+ XBF_MAPPED);
if (!bp)
return XFS_ERROR(ENOMEM);
error = bp->b_error;
@@ -1966,7 +1966,7 @@ xfs_zero_remaining_bytes(
bp = xfs_buf_get_uncached(XFS_IS_REALTIME_INODE(ip) ?
mp->m_rtdev_targp : mp->m_ddev_targp,
- BTOBB(mp->m_sb.sb_blocksize), XBF_DONT_BLOCK);
+ BTOBB(mp->m_sb.sb_blocksize), 0);
if (!bp)
return XFS_ERROR(ENOMEM);
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