diff options
author | David Howells <dhowells@redhat.com> | 2023-05-22 21:57:44 +0100 |
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committer | Jens Axboe <axboe@kernel.dk> | 2023-05-24 08:42:44 -0600 |
commit | 403b6fb8dac1e9407c04652cedd92285c5ae9aa5 (patch) | |
tree | 42ba9e7528e304cc6f82045d386910f063a27a9b /block/partitions | |
parent | a7e689dd1c06e0cbd6d216a6868e33099d8fc8d8 (diff) |
block: convert bio_map_user_iov 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 visible to/affected by
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/20230522205744.2825689-7-dhowells@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/partitions')
0 files changed, 0 insertions, 0 deletions