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brd: decrease the number of allocated pages which discarded

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[ Upstream commit 82734209bedd65a8b508844bab652b464379bfdd ]

The number of allocated pages which discarded will not decrease.
Fix it.

Fixes: 9ead7efc6f ("brd: implement discard support")

Signed-off-by: Zhang Xianwei <zhang.xianwei8@zte.com.cn>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20241128170056565nPKSz2vsP8K8X2uk2iaDG@zte.com.cn
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Zhang Xianwei
2024-11-28 17:00:56 +08:00
committed by Greg Kroah-Hartman
parent 01a853faae
commit fbc342372a
1 changed files with 3 additions and 1 deletions
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4
drivers/block/brd.c
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@@ -231,8 +231,10 @@ static void brd_do_discard(struct brd_device *brd, sector_t sector, u32 size)
xa_lock(&brd->brd_pages);
while (size >= PAGE_SIZE && aligned_sector < rd_size * 2) {
page = __xa_erase(&brd->brd_pages, aligned_sector >> PAGE_SECTORS_SHIFT);
if (page)
if (page) {
__free_page(page);
brd->brd_nr_pages--;
}
aligned_sector += PAGE_SECTORS;
size -= PAGE_SIZE;
}