dm writecache: support optional offset for start of device

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Add an optional parameter "start_sector" to allow the start of the
device to be offset by the specified number of 512-byte sectors.  The
sectors below this offset are not used by the writecache device and are
left to be used for disk labels and/or userspace metadata (e.g. lvm).

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

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Mikulas Patocka 2018-06-28 21:00:14 -04:00 • committed by Mike Snitzer

parent 021c91791a

commit d284f8248c

2 changed files with 31 additions and 14 deletions

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2

Documentation/device-mapper/writecache.txt

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43

drivers/md/dm-writecache.c

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