| commit | e384e58549a2e9a83071ad80280c1a9053cfd84c | |
| author | NeilBrown <neilb@suse.de> | |
| Tue, 1 Jun 2010 09:37:34 +0000 (1 19:37 +1000) | ||
| committer | NeilBrown <neilb@suse.de> | |
| Mon, 26 Jul 2010 03:21:34 +0000 (26 13:21 +1000) | ||
| tree | 805619143612ddc8cc71a45dd4522393c23a576f | treesnapshot (tar.gz zip) |
| parent | ef4256733506f2459a0c436b62267d22a3f0cec6 | commitdiff |
md/bitmap: prepare for storing write-intent-bitmap via dm-dirty-log.
This allows md/raid5 to fully work as a dm target.
Normally md uses a 'filemap' which contains a list of pages of bits
each of which may be written separately.
dm-log uses and all-or-nothing approach to writing the log, so
when using a dm-log, ->filemap is NULL and the flags normally stored
in filemap_attr are stored in ->logattrs instead.
Signed-off-by: NeilBrown <neilb@suse.de>
This allows md/raid5 to fully work as a dm target.
Normally md uses a 'filemap' which contains a list of pages of bits
each of which may be written separately.
dm-log uses and all-or-nothing approach to writing the log, so
when using a dm-log, ->filemap is NULL and the flags normally stored
in filemap_attr are stored in ->logattrs instead.
Signed-off-by: NeilBrown <neilb@suse.de>
| drivers/md/bitmap.c | diffblobblamehistory | |
| drivers/md/bitmap.h | diffblobblamehistory | |
| drivers/md/md.h | diffblobblamehistory |