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由 Jens Axboe 提交于
Once we've copied some data for an iocb that is marked with IOCB_WAITQ, we should no longer attempt to async lock a new page. Instead make sure we return the copied amount, and let the caller retry, instead of returning -EIOCBQUEUED for a new page. This should only be possible with read-ahead disabled on the below device, and multiple threads racing on the same file. Haven't been able to reproduce on anything else. Cc: stable@vger.kernel.org # v5.9 Fixes: 1a0a7853 ("mm: support async buffered reads in generic_file_buffered_read()") Reported-by: NKent Overstreet <kent.overstreet@gmail.com> Signed-off-by: NJens Axboe <axboe@kernel.dk>
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