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authorJonathan Brassow <jbrassow@redhat.com>2007-07-12 17:28:25 +0100
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-12 15:01:08 -0700
commit943317efdbc295e8a28df3f5cbd549d066ee8b4a (patch)
tree63eea4f14c4b3913b6755d802afb7631007a9e0e /drivers/spi/omap_uwire.c
parent0764147b111b8ca886e4f2e9c9e019106b09b657 (diff)
dm raid1: clear region outside spinlock
A clear_region function is permitted to block (in practice, rare) but gets called in rh_update_states() with a spinlock held. The bits being marked and cleared by the above functions are used to update the on-disk log, but are never read directly. We can perform these operations outside the spinlock since the bits are only changed within one thread viz. - mark_region in rh_inc() - clear_region in rh_update_states(). So, we grab the clean_regions list items via list_splice() within the spinlock and defer clear_region() until we iterate over the list for deletion - similar to how the recovered_regions list is already handled. We then move the flush() call down to ensure it encapsulates the changes which are done by the later calls to clear_region(). Signed-off-by: Jonathan Brassow <jbrassow@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/spi/omap_uwire.c')
0 files changed, 0 insertions, 0 deletions