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authorLinus Torvalds <torvalds@linux-foundation.org>2018-07-20 14:24:17 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-07-20 14:24:17 -0700
commitb4460a9586c381edcec6a702ec8cfc80995063fc (patch)
tree668350a1554d6c778055f85a04953e5eabcecfd0 /Documentation
parent18cadf9f370735512eb8254beab77e26297a0e33 (diff)
parentd284f8248c72d0cb36a930920e60592eb455cd0d (diff)
Merge tag 'for-4.18/dm-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
Pull device mapper fix from Mike Snitzer: "Fix DM writecache target to allow an optional offset to the start of the data and metadata area. This allows userspace tools (e.g. LVM2) to place a header and metadata at the front of the writecache device for its use" * tag 'for-4.18/dm-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: dm writecache: support optional offset for start of device
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/device-mapper/writecache.txt2
1 files changed, 2 insertions, 0 deletions
diff --git a/Documentation/device-mapper/writecache.txt b/Documentation/device-mapper/writecache.txt
index 4424fa2c67d7..01532b3008ae 100644
--- a/Documentation/device-mapper/writecache.txt
+++ b/Documentation/device-mapper/writecache.txt
@@ -15,6 +15,8 @@ Constructor parameters:
size)
5. the number of optional parameters (the parameters with an argument
count as two)
+ start_sector n (default: 0)
+ offset from the start of cache device in 512-byte sectors
high_watermark n (default: 50)
start writeback when the number of used blocks reach this
watermark