The patch titled
dm mirror log: sync_count fix
has been added to the -mm tree. Its filename is
dm-mirror-log-sync_count-fix.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: dm mirror log: sync_count fix
From: Alasdair G Kergon <agk@xxxxxxxxxx>
When a mirror is reduced in size, clear the part of the bitmap that is no
longer used.
Signed-off-by: Alasdair G Kergon <agk@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
drivers/md/dm-log.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff -puN drivers/md/dm-log.c~dm-mirror-log-sync_count-fix drivers/md/dm-log.c
--- a/drivers/md/dm-log.c~dm-mirror-log-sync_count-fix
+++ a/drivers/md/dm-log.c
@@ -447,7 +447,7 @@ static int disk_resume(struct dirty_log
if (r)
return r;
- /* set or clear any new bits */
+ /* set or clear any new bits -- device has grown */
if (lc->sync == NOSYNC)
for (i = lc->header.nr_regions; i < lc->region_count; i++)
/* FIXME: amazingly inefficient */
@@ -457,6 +457,10 @@ static int disk_resume(struct dirty_log
/* FIXME: amazingly inefficient */
log_clear_bit(lc, lc->clean_bits, i);
+ /* clear any old bits -- device has shrunk */
+ for (i = lc->region_count; i % (sizeof(*lc->clean_bits) << BYTE_SHIFT); i++)
+ log_clear_bit(lc, lc->clean_bits, i);
+
/* copy clean across to sync */
memcpy(lc->sync_bits, lc->clean_bits, size);
lc->sync_count = count_bits32(lc->clean_bits, lc->bitset_uint32_count);
_
Patches currently in -mm which might be from agk@xxxxxxxxxx are
git-hdrinstall2.patch
dm-snapshot-unify-chunk_size.patch
lib-add-idr_replace.patch
lib-add-idr_replace-tidy.patch
dm-fix-idr-minor-allocation.patch
dm-move-idr_pre_get.patch
dm-change-minor_lock-to-spinlock.patch
dm-add-dmf_freeing.patch
dm-fix-mapped-device-ref-counting.patch
dm-add-module-ref-counting.patch
dm-fix-block-device-initialisation.patch
dm-mirror-sector-offset-fix.patch
dm-table-get_target-fix-last-index.patch
dm-support-ioctls-on-mapped-devices.patch
dm-linear-support-ioctls.patch
dm-mpath-support-ioctls.patch
dm-export-blkdev_driver_ioctl.patch
dm-mirror-log-sector-size-fix.patch
dm-mirror-log-refactor-context.patch
dm-mirror-log-bitset_size-fix.patch
dm-mirror-log-sync_count-fix.patch
dm-kcopyd-error-accumulation-fix.patch
dm-table-split_args-handle-no-input.patch
dm-consolidate-creation-functions.patch
dm-add-exports.patch
dm-create-error-table.patch
dm-prevent-removal-if-open.patch
dm-improve-error-message-consistency.patch
md-dm-reduce-stack-usage-with-stacked-block-devices.patch
-
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