Commit cf2cb784 authored Jun 20, 2017 by Brian Foster Committed by Darrick J. Wong Jun 27, 2017

xfs: free cowblocks and retry on buffered write ENOSPC



XFS runs an eofblocks reclaim scan before returning an ENOSPC error to
userspace for buffered writes. This facilitates aggressive speculative
preallocation without causing user visible side effects such as
premature ENOSPC.

Run a cowblocks scan in the same situation to reclaim lingering COW fork
preallocation throughout the filesystem.

Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>

parent 3e88a007

fs/xfs/xfs_file.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -660,6 +660,7 @@ write_retry:
		xfs_iunlock(ip, iolock);
		eofb.eof_flags = XFS_EOF_FLAGS_SYNC;
		xfs_icache_free_eofblocks(ip->i_mount, &eofb);
		xfs_icache_free_cowblocks(ip->i_mount, &eofb);
		goto write_retry;
		}

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