Rebased this patchset onto 5.9, I'd like to finally get this because generic_file_buffered_read() has turned into a real monstrosity to work with. And it's a major performance improvement, for both small random and large sequential reads. On my test box, 4k buffered random reads go from ~150k to ~250k iops, and the improvements to big sequential reads are even bigger. This incorporates the fix for IOCB_WAITQ handling that Jens just posted as well, also factors out lock_page_for_iocb() to improve handling of the various iocb flags. Kent Overstreet (2): fs: Break generic_file_buffered_read up into multiple functions fs: generic_file_buffered_read() now uses find_get_pages_contig mm/filemap.c | 563 ++++++++++++++++++++++++++++++--------------------- 1 file changed, 328 insertions(+), 235 deletions(-) -- 2.28.0
