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scan: create bcache with minimum number of blocks

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In some odd cases (e.g. tests) there are very few devices
which results in creating too few blocks in bcache, so
create bcache with a minimum number of blocks.
This commit is contained in:
David Teigland 2018-02-27 12:35:45 -06:00
parent e49b114f7e
commit 21057676a1
1 changed files with 5 additions and 3 deletions
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8
lib/label/label.c
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@ -560,13 +560,15 @@ static int _scan_list(struct dm_list *devs, int *failed)
return 1;
}
#define MIN_BCACHE_BLOCKS 32
static int _setup_bcache(int cache_blocks)
{
struct io_engine *ioe;
/* No devices can happen, just create bcache with any small number. */
if (!cache_blocks)
cache_blocks = 8;
if (cache_blocks < MIN_BCACHE_BLOCKS)
cache_blocks = MIN_BCACHE_BLOCKS;
/*
* 100 is arbitrary, it's the max number of concurrent aio's
@ -831,7 +833,7 @@ int label_read_sector(struct device *dev, struct label **labelp, uint64_t scan_s
int label_scan_setup_bcache(void)
{
if (!scan_bcache) {
if (!_setup_bcache(32))
if (!_setup_bcache(0))
return 0;
}