From: Kent Overstreet <kent.overstreet@gmail.com>
To: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
akpm@linux-foundation.org
Cc: Kent Overstreet <kent.overstreet@gmail.com>, willy@infradead.org
Subject: [PATCH 0/2] generic_file_buffered_read() refactoring, perf improvements
Date: Sat, 17 Oct 2020 16:10:53 -0400 [thread overview]
Message-ID: <20201017201055.2216969-1-kent.overstreet@gmail.com> (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
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
next 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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