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dm integrity: scale down the recalculate buffer if memory allocation fails

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If memory allocation fails, try to reduce the size of the recalculate
buffer and continue with that smaller buffer.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
This commit is contained in:
Mikulas Patocka 2023-06-26 16:46:57 +02:00 committed by Mike Snitzer
parent da8b4fc1f6
commit 3be1622895
1 changed files with 11 additions and 5 deletions
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16
drivers/md/dm-integrity.c
View File

@ -2658,19 +2658,25 @@ static void integrity_recalc(struct work_struct *w)
unsigned int i;
int r;
unsigned int super_counter = 0;
unsigned recalc_sectors = RECALC_SECTORS;
recalc_buffer = __vmalloc(RECALC_SECTORS << SECTOR_SHIFT, GFP_NOIO);
retry:
recalc_buffer = __vmalloc(recalc_sectors << SECTOR_SHIFT, GFP_NOIO);
if (!recalc_buffer) {
oom:
recalc_sectors >>= 1;
if (recalc_sectors >= 1U << ic->sb->log2_sectors_per_block)
goto retry;
DMCRIT("out of memory for recalculate buffer - recalculation disabled");
goto free_ret;
}
recalc_tags_size = (RECALC_SECTORS >> ic->sb->log2_sectors_per_block) * ic->tag_size;
recalc_tags_size = (recalc_sectors >> ic->sb->log2_sectors_per_block) * ic->tag_size;
if (crypto_shash_digestsize(ic->internal_hash) > ic->tag_size)
recalc_tags_size += crypto_shash_digestsize(ic->internal_hash) - ic->tag_size;
recalc_tags = kvmalloc(recalc_tags_size, GFP_NOIO);
if (!recalc_tags) {
DMCRIT("out of memory for recalculate buffer - recalculation disabled");
goto free_ret;
vfree(recalc_buffer);
goto oom;
}
DEBUG_print("start recalculation... (position %llx)\n", le64_to_cpu(ic->sb->recalc_sector));
@ -2693,7 +2699,7 @@ next_chunk:
}
get_area_and_offset(ic, range.logical_sector, &area, &offset);
range.n_sectors = min((sector_t)RECALC_SECTORS, ic->provided_data_sectors - range.logical_sector);
range.n_sectors = min((sector_t)recalc_sectors, ic->provided_data_sectors - range.logical_sector);
if (!ic->meta_dev)
range.n_sectors = min(range.n_sectors, ((sector_t)1U << ic->sb->log2_interleave_sectors) - (unsigned int)offset);