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dm io: bump num_bvecs to handle offset memory

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If dp->get_page() returns a non-zero offset, the bio might need an
additional bvec to deal with the offset. For example, if remaining is
exactly one page size, but there is an offset, the memory will span
two pages.

Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
This commit is contained in:
Benjamin Marzinski 2024-07-02 11:56:45 +02:00 committed by Mikulas Patocka
parent aaa53168cb
commit 06a0b333e5
1 changed files with 1 additions and 1 deletions
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2
drivers/md/dm-io.c
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@ -347,7 +347,7 @@ static void do_region(const blk_opf_t opf, unsigned int region,
break;
default:
num_bvecs = bio_max_segs(dm_sector_div_up(remaining,
(PAGE_SIZE >> SECTOR_SHIFT)));
(PAGE_SIZE >> SECTOR_SHIFT)) + 1);
}
bio = bio_alloc_bioset(where->bdev, num_bvecs, opf, GFP_NOIO,