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authorLinus Torvalds <torvalds@linux-foundation.org>2011-05-26 10:49:11 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-05-26 10:49:11 -0700
commit8a0599dd2471f2a2e409498c08a0ab339057ad06 (patch)
treec23c72f3eb4a95d8854720be9d8a228d4adae54a /Documentation
parent35806b4f7c5620b547f183e9d53f7cfaeabb582b (diff)
parent233eebb9a96f956c541c0c9094fd321894bd93a7 (diff)
Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs
* 'for-linus' of git://oss.sgi.com/xfs/xfs: xfs: correctly decrement the extent buffer index in xfs_bmap_del_extent xfs: check for valid indices in xfs_iext_get_ext and xfs_iext_idx_to_irec xfs: fix up asserts in xfs_iflush_fork xfs: do not do pointer arithmetic on extent records xfs: do not use unchecked extent indices in xfs_bunmapi xfs: do not use unchecked extent indices in xfs_bmapi xfs: do not use unchecked extent indices in xfs_bmap_add_extent_* xfs: remove if_lastex xfs: remove the unused XFS_BMAPI_RSVBLOCKS flag xfs: do not discard alloc btree blocks xfs: add online discard support
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/filesystems/xfs.txt6
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/filesystems/xfs.txt b/Documentation/filesystems/xfs.txt
index 7bff3e4f35df..3fc0c31a6f5d 100644
--- a/Documentation/filesystems/xfs.txt
+++ b/Documentation/filesystems/xfs.txt
@@ -39,6 +39,12 @@ When mounting an XFS filesystem, the following options are accepted.
drive level write caching to be enabled, for devices that
support write barriers.
+ discard
+ Issue command to let the block device reclaim space freed by the
+ filesystem. This is useful for SSD devices, thinly provisioned
+ LUNs and virtual machine images, but may have a performance
+ impact. This option is incompatible with the nodelaylog option.
+
dmapi
Enable the DMAPI (Data Management API) event callouts.
Use with the "mtpt" option.