summaryrefslogtreecommitdiff
path: root/Documentation/ABI
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2009-04-01 10:57:49 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-04-01 10:57:49 -0700
commit395d73413c5656c6d7706ae91dcb441f9b7e3074 (patch)
tree7fadabe996f70d7918583fa2312d4fad19397fcb /Documentation/ABI
parentc226fd659fa7b6a7b038df5ae6856a68514bacde (diff)
parent06705bff9114531a997a7d0c2520bea0f2927410 (diff)
downloadlinux-3.10-395d73413c5656c6d7706ae91dcb441f9b7e3074.tar.gz
linux-3.10-395d73413c5656c6d7706ae91dcb441f9b7e3074.tar.bz2
linux-3.10-395d73413c5656c6d7706ae91dcb441f9b7e3074.zip
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (33 commits) ext4: Regularize mount options ext4: fix locking typo in mballoc which could cause soft lockup hangs ext4: fix typo which causes a memory leak on error path jbd2: Update locking coments ext4: Rename pa_linear to pa_type ext4: add checks of block references for non-extent inodes ext4: Check for an valid i_mode when reading the inode from disk ext4: Use WRITE_SYNC for commits which are caused by fsync() ext4: Add auto_da_alloc mount option ext4: Use struct flex_groups to calculate get_orlov_stats() ext4: Use atomic_t's in struct flex_groups ext4: remove /proc tuning knobs ext4: Add sysfs support ext4: Track lifetime disk writes ext4: Fix discard of inode prealloc space with delayed allocation. ext4: Automatically allocate delay allocated blocks on rename ext4: Automatically allocate delay allocated blocks on close ext4: add EXT4_IOC_ALLOC_DA_BLKS ioctl ext4: Simplify delalloc code by removing mpage_da_writepages() ext4: Save stack space by removing fake buffer heads ...
Diffstat (limited to 'Documentation/ABI')
-rw-r--r--Documentation/ABI/testing/sysfs-fs-ext481
1 files changed, 81 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-fs-ext4 b/Documentation/ABI/testing/sysfs-fs-ext4
new file mode 100644
index 00000000000..4e79074de28
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-fs-ext4
@@ -0,0 +1,81 @@
+What: /sys/fs/ext4/<disk>/mb_stats
+Date: March 2008
+Contact: "Theodore Ts'o" <tytso@mit.edu>
+Description:
+ Controls whether the multiblock allocator should
+ collect statistics, which are shown during the unmount.
+ 1 means to collect statistics, 0 means not to collect
+ statistics
+
+What: /sys/fs/ext4/<disk>/mb_group_prealloc
+Date: March 2008
+Contact: "Theodore Ts'o" <tytso@mit.edu>
+Description:
+ The multiblock allocator will round up allocation
+ requests to a multiple of this tuning parameter if the
+ stripe size is not set in the ext4 superblock
+
+What: /sys/fs/ext4/<disk>/mb_max_to_scan
+Date: March 2008
+Contact: "Theodore Ts'o" <tytso@mit.edu>
+Description:
+ The maximum number of extents the multiblock allocator
+ will search to find the best extent
+
+What: /sys/fs/ext4/<disk>/mb_min_to_scan
+Date: March 2008
+Contact: "Theodore Ts'o" <tytso@mit.edu>
+Description:
+ The minimum number of extents the multiblock allocator
+ will search to find the best extent
+
+What: /sys/fs/ext4/<disk>/mb_order2_req
+Date: March 2008
+Contact: "Theodore Ts'o" <tytso@mit.edu>
+Description:
+ Tuning parameter which controls the minimum size for
+ requests (as a power of 2) where the buddy cache is
+ used
+
+What: /sys/fs/ext4/<disk>/mb_stream_req
+Date: March 2008
+Contact: "Theodore Ts'o" <tytso@mit.edu>
+Description:
+ Files which have fewer blocks than this tunable
+ parameter will have their blocks allocated out of a
+ block group specific preallocation pool, so that small
+ files are packed closely together. Each large file
+ will have its blocks allocated out of its own unique
+ preallocation pool.
+
+What: /sys/fs/ext4/<disk>/inode_readahead
+Date: March 2008
+Contact: "Theodore Ts'o" <tytso@mit.edu>
+Description:
+ Tuning parameter which controls the maximum number of
+ inode table blocks that ext4's inode table readahead
+ algorithm will pre-read into the buffer cache
+
+What: /sys/fs/ext4/<disk>/delayed_allocation_blocks
+Date: March 2008
+Contact: "Theodore Ts'o" <tytso@mit.edu>
+Description:
+ This file is read-only and shows the number of blocks
+ that are dirty in the page cache, but which do not
+ have their location in the filesystem allocated yet.
+
+What: /sys/fs/ext4/<disk>/lifetime_write_kbytes
+Date: March 2008
+Contact: "Theodore Ts'o" <tytso@mit.edu>
+Description:
+ This file is read-only and shows the number of kilobytes
+ of data that have been written to this filesystem since it was
+ created.
+
+What: /sys/fs/ext4/<disk>/session_write_kbytes
+Date: March 2008
+Contact: "Theodore Ts'o" <tytso@mit.edu>
+Description:
+ This file is read-only and shows the number of
+ kilobytes of data that have been written to this
+ filesystem since it was mounted.