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dm cache metadata: use dm_bitset_new() to create the dirty bitset in format 2 

Big speed up with large configs.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Joe Thornber 2016-09-22 10:45:21 -04:00 committed by Mike Snitzer
parent 2151249eaa
commit 683bb1a374
1 changed files with 11 additions and 11 deletions
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22
drivers/md/dm-cache-metadata.c
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@ -1547,10 +1547,16 @@ static int __set_dirty_bits_v1(struct dm_cache_metadata *cmd, unsigned nr_bits,
return 0;
}
static int is_dirty_callback(uint32_t index, bool *value, void *context)
{
unsigned long *bits = context;
*value = test_bit(index, bits);
return 0;
}
static int __set_dirty_bits_v2(struct dm_cache_metadata *cmd, unsigned nr_bits, unsigned long *bits)
{
int r = 0;
unsigned i;
/* nr_bits is really just a sanity check */
if (nr_bits != from_cblock(cmd->cache_blocks)) {
@ -1558,18 +1564,12 @@ static int __set_dirty_bits_v2(struct dm_cache_metadata *cmd, unsigned nr_bits,
return -EINVAL;
}
for (i = 0; i < nr_bits; i++) {
if (test_bit(i, bits))
r = dm_bitset_set_bit(&cmd->dirty_info, cmd->dirty_root, i, &cmd->dirty_root);
else
r = dm_bitset_clear_bit(&cmd->dirty_info, cmd->dirty_root, i, &cmd->dirty_root);
if (r)
return r;
}
r = dm_bitset_del(&cmd->dirty_info, cmd->dirty_root);
if (r)
return r;
cmd->changed = true;
return dm_bitset_flush(&cmd->dirty_info, cmd->dirty_root, &cmd->dirty_root);
return dm_bitset_new(&cmd->dirty_info, &cmd->dirty_root, nr_bits, is_dirty_callback, bits);
}
int dm_cache_set_dirty_bits(struct dm_cache_metadata *cmd,