diff options
Diffstat (limited to 'block/io.c')
| -rw-r--r-- | block/io.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/block/io.c b/block/io.c index 8ca9d43724..0f15d05297 100644 --- a/block/io.c +++ b/block/io.c @@ -2368,19 +2368,21 @@ int coroutine_fn bdrv_co_discard(BlockDriverState *bs, int64_t sector_num, goto out; } - max_discard = MIN_NON_ZERO(bs->bl.max_discard, BDRV_REQUEST_MAX_SECTORS); + max_discard = MIN_NON_ZERO(bs->bl.max_pdiscard >> BDRV_SECTOR_BITS, + BDRV_REQUEST_MAX_SECTORS); while (nb_sectors > 0) { int ret; int num = nb_sectors; + int discard_alignment = bs->bl.pdiscard_alignment >> BDRV_SECTOR_BITS; /* align request */ - if (bs->bl.discard_alignment && - num >= bs->bl.discard_alignment && - sector_num % bs->bl.discard_alignment) { - if (num > bs->bl.discard_alignment) { - num = bs->bl.discard_alignment; + if (discard_alignment && + num >= discard_alignment && + sector_num % discard_alignment) { + if (num > discard_alignment) { + num = discard_alignment; } - num -= sector_num % bs->bl.discard_alignment; + num -= sector_num % discard_alignment; } /* limit request size */ |