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See http://www.infradead.org/rpr.html X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: 1819BA0016 X-Rspam-User: X-Stat-Signature: o7ykwe1j8t9gk8k5tm559xcn6i3t19j4 X-HE-Tag: 1674653694-19050 X-HE-Meta: U2FsdGVkX18auPOTePUmqSr1fmlA4AnuAi4bs4IBh+jToKIBtuOV2Vqul5hilU1pZ+0h7/LKHF/i1xhFdlTQB8ygQQ+unIHPVBvv7LxrB+JoXHTHxQcLU1PozLQN828Fx01lY6kDkv4pUnwg/vf9p8V3O8q/nTrXLlGq06ZXA+iUe75TXpW7RTie3MCgyHHFvYDABYjKPpKEGs86/NQi+MDm367WP5WoIiq0E3heDtPqNL+HPIlV8osq5/4g0GT8sZE5mJyUkkMFpWQMRw4iD3isLxYiI9RjZzznw6J0hiOuheOYjsnjWaQstoeS7y+swYP19+NQGRmTD0DNSz6VrC0DBa4EhNZvAjbWsIwXQ92+/v0iPKOsnqIOgDOGStRBbbx9CII+AO3f7P2zoP316UDFf4zpOmcO3eGwXOxIN+vo+2sMRB504qWdF8M0+Pu75nox8Cv1TITKbuM9lkFCjBsSPRcoa6nvD3EJmkQeLAxLWadls1FjQcspWNil2NQfLFRL5C4kmlgnTGQONI21As3R1a4OQsRbIb1em57cKfHqvQWcwt2gYfnFJWlCUl+YvJPv+MViQf0F6Wt2vfsUb8XAC6TbNwfaaQ9M665aUQ59QMsudxbawHlttS34XAJIvdD+T5/APnqq9aXcZ4nedRhhUhACeTIsYsWfQQwPw/k3qa5JOmc0FCwYvNhYeMKI7jR+fCV7lmb3ILi6FRot/nYWNHiW2jKSNZ6SFv9BTM9WogEhidrZnDiSs5L7LMoT6msq1Vv+ha1DHhE3fHRVFZLfo8ORDaeDcosaKrw/zX2EAN0BTzFUIJqsULcVvyJpC3jfOHuMP3x3l8mo+KRorxSNf0BJsSxwAhk0aEJRAUGH0yjnzr61THeUZ6OUMZdUmwogTgBk42sAMvxsHoA4e2dpz/w9j7zuSCYqYYyNWAxGZut89olGffxxjaykzm5ZMZAfSVwX3fwbBeSDcYu Ah0QlbwL srYv5DH16hFXX3bc48QPmVdGeH7SrYwU8qWDRnD1c/sNOIy4iFBe1IeEwzWideOnZEKyewR1YH3kLIpg3PCEKYPjDiQoaIEUQ4yiX61oFFu0efguS1fv/VPOP3IEaOEYdRXCauchbV7PIIhNQNKPoGQN0JZDcUaYCk8gjo/UQJyGIPiS8kamSh+ImS0J0kt96pbh4u/IyQOIz8BiXQTw5kwZQxtnJzIg8j+3MtOFoX6AuCRgBsB9+QtnnUNJpy0jMy5rFr/ucRyUdWCK3ot1Oh9fEyDZ+pzm6SQmK14A9JG8d/wfsGvuQC3WWvknBgcaWDfRzFeEXpz5dh96SoI+AjFGA2YLmTATeCffT4JJ9QQCXXYz4vYJAZPuzcfurv9d1OwWdGr3keeJR5s2tTscSRo1SGSUfTm5H6i/Aac/2CdOQkwLzXe8kxoeY0yCF4Z72Fg6oMv8wCtu6caSSE7Ri3Wum0Omj+kVkXhzd X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Hi all, this series removes the ->rw_page block_device_operation, which is an old and clumsy attempt at a simple read/write fast path for the block layer. It isn't actually used by the fastest block layer operations that we support (polled I/O through io_uring), but only used by the mpage buffered I/O helpers which are some of the slowest I/O we have and do not make any difference there at all, and zram which is a block device abused to duplicate the zram functionality. Given that zram is heavily used we need to make sure there is a good replacement for synchronous I/O, so this series adds a new flag for drivers that complete I/O synchronously and uses that flag to use on-stack bios and synchronous submission for them in the swap code. Diffstat: block/bdev.c | 78 ------------------ drivers/block/brd.c | 15 --- drivers/block/zram/zram_drv.c | 61 -------------- drivers/nvdimm/btt.c | 16 --- drivers/nvdimm/pmem.c | 24 ----- fs/mpage.c | 10 -- include/linux/blkdev.h | 12 +- mm/page_io.c | 182 ++++++++++++++++++++++-------------------- mm/swap.h | 9 -- mm/swapfile.c | 2 10 files changed, 114 insertions(+), 295 deletions(-)