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authorDavid Chinner <dgc@sgi.com>2005-11-02 10:33:05 +1100
committerNathan Scott <nathans@sgi.com>2005-11-02 10:33:05 +1100
commite8c8b3a79d85c22d3665b97dde843dc4d8d7ae37 (patch)
treea82b58ebc5c40474cdc53c91bd135b97034de565 /fs/xfs/xfs_clnt.h
parentee34807a65aa0c5911dc27682863afca780a003e (diff)
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[XFS] Introduce two new mount options (nolargeio/largeio) to allow
filesystems to expose the filesystem stripe width in stat(2) rather than the page cache size. This allows applications requiring high bandwidth to easily determine the optimum I/O size for the underlying filesystem. The default is to report the page cache size (i.e. "nolargeio"). SGI-PV: 942818 SGI-Modid: xfs-linux:xfs-kern:23830a Signed-off-by: David Chinner <dgc@sgi.com> Signed-off-by: Nathan Scott <nathans@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_clnt.h')
-rw-r--r--fs/xfs/xfs_clnt.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/xfs/xfs_clnt.h b/fs/xfs/xfs_clnt.h
index c93cb28..90d9d56 100644
--- a/fs/xfs/xfs_clnt.h
+++ b/fs/xfs/xfs_clnt.h
@@ -106,5 +106,7 @@ struct xfs_mount_args {
#define XFSMNT_IHASHSIZE 0x20000000 /* inode hash table size */
#define XFSMNT_DIRSYNC 0x40000000 /* sync creat,link,unlink,rename
* symlink,mkdir,rmdir,mknod */
+#define XFSMNT_COMPAT_IOSIZE 0x80000000 /* don't report large preferred
+ * I/O size in stat() */
#endif /* __XFS_CLNT_H__ */
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