linux-kernel - [PATCH] mm: vmstats: tlb flush counters

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Message-Id: <20130716155304.AF1A88F8@viggo.jf.intel.com>
Date:	Tue, 16 Jul 2013 08:53:04 -0700
From:	Dave Hansen <dave@...1.net>
To:	linux-kernel@...r.kernel.org
Cc:	x86@...nel.org, linux-mm@...ck.org, Dave Hansen <dave@...1.net>
Subject: [PATCH] mm: vmstats: tlb flush counters

I was investigating some TLB flush scaling issues and realized
that we do not have any good methods for figuring out how many
TLB flushes we are doing.

It would be nice to be able to do these in generic code, but the
arch-independent calls don't explicitly specify whether we
actually need to do remote flushes or not.  In the end, we really
need to know if we actually _did_ global vs. local invalidations,
so that leaves us with few options other than to muck with the
counters from arch-specific code.

Signed-off-by: Dave Hansen <dave.hansen@...ux.intel.com>
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