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block: unpin user pages belonging to a folio at once

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Use newly added mm function unpin_user_folio() to put refs by npages
count.

Signed-off-by: Kundan Kumar <kundan.kumar@samsung.com>
Tested-by: Luis Chamberlain <mcgrof@kernel.org>
Link: https://lore.kernel.org/r/20240911064935.5630-5-kundan.kumar@samsung.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Kundan Kumar 2024-09-11 12:19:35 +05:30 committed by Jens Axboe
parent d3bfbfb124
commit eb1d46fcd5
1 changed files with 5 additions and 9 deletions
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14
block/bio.c
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@ -1190,7 +1190,6 @@ void __bio_release_pages(struct bio *bio, bool mark_dirty)
struct folio_iter fi;
bio_for_each_folio_all(fi, bio) {
struct page *page;
size_t nr_pages;
if (mark_dirty) {
@ -1198,12 +1197,9 @@ void __bio_release_pages(struct bio *bio, bool mark_dirty)
folio_mark_dirty(fi.folio);
folio_unlock(fi.folio);
}
page = folio_page(fi.folio, fi.offset / PAGE_SIZE);
nr_pages = (fi.offset + fi.length - 1) / PAGE_SIZE -
fi.offset / PAGE_SIZE + 1;
do {
bio_release_page(bio, page++);
} while (--nr_pages != 0);
unpin_user_folio(fi.folio, nr_pages);
}
}
EXPORT_SYMBOL_GPL(__bio_release_pages);
@ -1241,8 +1237,8 @@ static int bio_iov_add_folio(struct bio *bio, struct folio *folio, size_t len,
folio_page(folio, 0), len, offset,
&same_page)) {
bio->bi_iter.bi_size += len;
if (same_page)
bio_release_page(bio, folio_page(folio, 0));
if (same_page && bio_flagged(bio, BIO_PAGE_PINNED))
unpin_user_folio(folio, 1);
return 0;
}
bio_add_folio_nofail(bio, folio, len, offset);
@ -1258,8 +1254,8 @@ static int bio_iov_add_zone_append_folio(struct bio *bio, struct folio *folio,
if (bio_add_hw_folio(q, bio, folio, len, offset,
queue_max_zone_append_sectors(q), &same_page) != len)
return -EINVAL;
if (same_page)
bio_release_page(bio, folio_page(folio, 0));
if (same_page && bio_flagged(bio, BIO_PAGE_PINNED))
unpin_user_folio(folio, 1);
return 0;
}