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alloc: enhance estimation of sufficient_pes_free

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Since commit 77fdc17d70 always include
log_len size into needed extents - however now we may need sometimes
more extents then necessary - mainly when multiple PVs are involved
into allocation.

Add logs_still_needed into calculation of sufficient_pes_free()
This commit is contained in:
Zdenek Kabelac 2021-01-12 15:58:07 +01:00
parent b98c334635
commit 194630be52
1 changed files with 7 additions and 3 deletions
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10
lib/metadata/lv_manip.c
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@ -1700,11 +1700,13 @@ static uint32_t _mirror_log_extents(uint32_t region_size, uint32_t pe_size, uint
/* Is there enough total space or should we give up immediately? */
static int _sufficient_pes_free(struct alloc_handle *ah, struct dm_list *pvms,
uint32_t allocated, uint32_t extents_still_needed)
uint32_t allocated, uint32_t log_still_needed,
uint32_t extents_still_needed)
{
uint32_t area_extents_needed = (extents_still_needed - allocated) * ah->area_count / ah->area_multiple;
uint32_t parity_extents_needed = (extents_still_needed - allocated) * ah->parity_count / ah->area_multiple;
uint32_t metadata_extents_needed = ah->alloc_and_split_meta ? 0 : ah->metadata_area_count * RAID_METADATA_AREA_LEN + ah->log_len; /* One each */
uint32_t metadata_extents_needed = (ah->alloc_and_split_meta ? 0 : ah->metadata_area_count * RAID_METADATA_AREA_LEN) +
(log_still_needed ? ah->log_len : 0); /* One each */
uint64_t total_extents_needed = (uint64_t)area_extents_needed + parity_extents_needed + metadata_extents_needed;
uint32_t free_pes = pv_maps_size(pvms);
@ -3200,7 +3202,9 @@ static int _allocate(struct alloc_handle *ah,
old_allocated = alloc_state.allocated;
log_debug_alloc("Trying allocation using %s policy.", get_alloc_string(alloc));
if (!ah->approx_alloc && !_sufficient_pes_free(ah, pvms, alloc_state.allocated, ah->new_extents))
if (!ah->approx_alloc && !_sufficient_pes_free(ah, pvms, alloc_state.allocated,
alloc_state.log_area_count_still_needed,
ah->new_extents))
goto_out;
_init_alloc_parms(ah, &alloc_parms, alloc, prev_lvseg,