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d5b58fbb2f
For the incoming usage of IOMAP_DIO_BOUNCE in btrfs, btrfs has set iov_iter::nofault to prevent deadlock when a page fault is needed to read out the buffer. However bio_iov_iter_bounce_write() doesn't respect iov_iter::nofault flag, and just call a plain copy_from_iter() so it can still trigger page fault and cause deadlock in btrfs. Fix it by utilizing copy_folio_from_iter_atomic() if nofault flag is set, otherwise use copy_folio_from_iter(). Signed-off-by: Qu Wenruo <wqu@suse.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Link: https://patch.msgid.link/9c165a314022b61566eb247852eb773ca6c70889.1781597506.git.wqu@suse.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2013 lines
54 KiB
2013 lines
54 KiB