linux-kernel - [PATCH 0/3] reduce readahead overheads on tmpfs mmap page faults

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Message-Id: <20110426094352.030753173@intel.com>
Date:	Tue, 26 Apr 2011 17:43:52 +0800
From:	Wu Fengguang <fengguang.wu@...el.com>
To:	Andi Kleen <andi@...stfloor.org>
cc:	Linux Memory Management List <linux-mm@...ck.org>
Subject: [PATCH 0/3] reduce readahead overheads on tmpfs mmap page faults

Andrew,

This kills unnessesary ra->mmap_miss and ra->prev_pos updates on every page
fault when the readahead is disabled.

They fix the cache line bouncing problem in the mosbench exim benchmark, which
does multi-threaded page faults on shared struct file on tmpfs.

Thanks,
Fengguang

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