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| author | David Howells <dhowells@redhat.com> | 2023-05-22 21:57:43 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2023-05-24 08:42:44 -0600 |
| commit | a7e689dd1c06e0cbd6d216a6868e33099d8fc8d8 (patch) | |
| tree | 582ba605c80892a13c90d6ef1d372f71685b9b21 /block/blk-map.c | |
| parent | fd363244e883323e1ac9412d96fd22b51e255b0c (diff) | |
| download | linux-stable-a7e689dd1c06e0cbd6d216a6868e33099d8fc8d8.tar.gz linux-stable-a7e689dd1c06e0cbd6d216a6868e33099d8fc8d8.tar.bz2 linux-stable-a7e689dd1c06e0cbd6d216a6868e33099d8fc8d8.zip | |
block: Convert bio_iov_iter_get_pages to use iov_iter_extract_pages
This will pin pages or leave them unaltered rather than getting a ref on
them as appropriate to the iterator.
The pages need to be pinned for DIO rather than having refs taken on them to
prevent VM copy-on-write from malfunctioning during a concurrent fork() (the
result of the I/O could otherwise end up being affected by/visible to the
child process).
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
cc: Al Viro <viro@zeniv.linux.org.uk>
cc: Jens Axboe <axboe@kernel.dk>
cc: Jan Kara <jack@suse.cz>
cc: Matthew Wilcox <willy@infradead.org>
cc: Logan Gunthorpe <logang@deltatee.com>
cc: linux-block@vger.kernel.org
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20230522205744.2825689-6-dhowells@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-map.c')
0 files changed, 0 insertions, 0 deletions