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| author | David Chinner <dgc@sgi.com> | 2005-11-02 10:33:05 +1100 |
|---|---|---|
| committer | Nathan Scott <nathans@sgi.com> | 2005-11-02 10:33:05 +1100 |
| commit | e8c8b3a79d85c22d3665b97dde843dc4d8d7ae37 (patch) | |
| tree | a82b58ebc5c40474cdc53c91bd135b97034de565 /fs/xfs/xfs_vfsops.c | |
| parent | ee34807a65aa0c5911dc27682863afca780a003e (diff) | |
| download | lwn-e8c8b3a79d85c22d3665b97dde843dc4d8d7ae37.tar.gz lwn-e8c8b3a79d85c22d3665b97dde843dc4d8d7ae37.zip | |
[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_vfsops.c')
| -rw-r--r-- | fs/xfs/xfs_vfsops.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/fs/xfs/xfs_vfsops.c b/fs/xfs/xfs_vfsops.c index 9142351df515..7227baee8994 100644 --- a/fs/xfs/xfs_vfsops.c +++ b/fs/xfs/xfs_vfsops.c @@ -307,6 +307,9 @@ xfs_start_flags( if (ap->flags & XFSMNT_DIRSYNC) mp->m_flags |= XFS_MOUNT_DIRSYNC; + if (ap->flags & XFSMNT_COMPAT_IOSIZE) + mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE; + /* * no recovery flag requires a read-only mount */ @@ -1645,6 +1648,9 @@ xfs_vget( #define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */ #define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */ #define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */ +#define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */ +#define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes + * in stat(). */ STATIC unsigned long suffix_strtoul(const char *cp, char **endp, unsigned int base) @@ -1681,6 +1687,7 @@ xfs_parseargs( int dsunit, dswidth, vol_dsunit, vol_dswidth; int iosize; + args->flags |= XFSMNT_COMPAT_IOSIZE; #if 0 /* XXX: off by default, until some remaining issues ironed out */ args->flags |= XFSMNT_IDELETE; /* default to on */ #endif @@ -1809,6 +1816,10 @@ xfs_parseargs( args->flags &= ~XFSMNT_IDELETE; } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) { args->flags |= XFSMNT_IDELETE; + } else if (!strcmp(this_char, MNTOPT_LARGEIO)) { + args->flags &= ~XFSMNT_COMPAT_IOSIZE; + } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) { + args->flags |= XFSMNT_COMPAT_IOSIZE; } else if (!strcmp(this_char, "osyncisdsync")) { /* no-op, this is now the default */ printk("XFS: osyncisdsync is now the default, option is deprecated.\n"); |