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From: Kent Overstreet <>
Cc: Kent Overstreet <>,
Subject: [PATCH 0/2] generic_file_buffered_read() refactoring, perf improvements
Date: Sat, 17 Oct 2020 16:10:53 -0400	[thread overview]
Message-ID: <> (raw)

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

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(-)


             reply	other threads:[~2020-10-17 20:11 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-17 20:10 Kent Overstreet [this message]
2020-10-17 20:10 ` [PATCH 1/2] fs: Break generic_file_buffered_read up into multiple functions Kent Overstreet
2020-10-20 14:44   ` Jens Axboe
2020-10-17 20:10 ` [PATCH 2/2] fs: generic_file_buffered_read() now uses find_get_pages_contig Kent Overstreet
2020-10-20 14:47   ` Jens Axboe

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