linux-ext4 - [PATCH 0/10 v2] Ranged pagevec lookup

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Message-Id: <20170726114704.7626-1-jack@suse.cz>
Date:   Wed, 26 Jul 2017 13:46:54 +0200
From:   Jan Kara <jack@...e.cz>
To:     <linux-mm@...ck.org>
Cc:     Andrew Morton <akpm@...ux-foundation.org>, Jan Kara <jack@...e.cz>,
        "Theodore Ts'o" <tytso@....edu>, linux-ext4@...r.kernel.org,
        Nadia Yvette Chambers <nyc@...omorphy.com>,
        linux-fsdevel@...r.kernel.org
Subject: [PATCH 0/10 v2] Ranged pagevec lookup

Hello,

This patch series was split out of the larger series to clean up pagevec APIs
and provide ranged lookups. In this series I make pagevec_lookup() update the
index (to be consistent with pagevec_lookup_tag() and also as a preparation
for ranged lookups), provide ranged variant of pagevec_lookup() and use it
in places where it makes sense. This not only removes some common code but
is also a measurable performance win for some use cases (see patch 4/10) where
radix tree is sparse and searching & grabing of a page after the end of the
range has measurable overhead.

Andrew, can you please consider merging this series?

Full series including dependencies can be also obtained from my git tree:

git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs.git find_get_pages_range

Opinions and review welcome!

								Honza