From: Rik van Riel <riel@redhat.com>
To: Mel Gorman <mgorman@suse.de>, Andrew Morton <akpm@linux-foundation.org>
Cc: Hugh Dickins <hughd@google.com>, Minchan Kim <minchan@kernel.org>,
Dave Hansen <dave.hansen@intel.com>,
Andi Kleen <andi@firstfloor.org>, H Peter Anvin <hpa@zytor.com>,
Ingo Molnar <mingo@kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Linux-MM <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 3/4] mm: Defer flush of writable TLB entries
Date: Tue, 09 Jun 2015 16:02:44 -0400 [thread overview]
Message-ID: <55774664.6060402@redhat.com> (raw)
In-Reply-To: <1433871118-15207-4-git-send-email-mgorman@suse.de>
On 06/09/2015 01:31 PM, Mel Gorman wrote:
> If a PTE is unmapped and it's dirty then it was writable recently. Due
> to deferred TLB flushing, it's best to assume a writable TLB cache entry
> exists. With that assumption, the TLB must be flushed before any IO can
> start or the page is freed to avoid lost writes or data corruption. This
> patch defers flushing of potentially writable TLBs as long as possible.
>
> Signed-off-by: Mel Gorman <mgorman@suse.de>
Acked-by: Rik van Riel <riel@redhat.com>
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next prev parent reply other threads:[~2015-06-09 20:02 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-09 17:31 [PATCH 0/3] TLB flush multiple pages per IPI v6 Mel Gorman
2015-06-09 17:31 ` [PATCH 1/4] x86, mm: Trace when an IPI is about to be sent Mel Gorman
2015-06-09 17:31 ` [PATCH 2/4] mm: Send one IPI per CPU to TLB flush all entries after unmapping pages Mel Gorman
2015-06-09 20:01 ` Rik van Riel
2015-06-10 7:47 ` Ingo Molnar
2015-06-10 8:14 ` Mel Gorman
2015-06-10 8:21 ` Ingo Molnar
2015-06-10 8:51 ` Mel Gorman
2015-06-10 8:26 ` Ingo Molnar
2015-06-10 9:58 ` Mel Gorman
2015-06-10 8:33 ` Ingo Molnar
2015-06-10 8:59 ` Mel Gorman
2015-06-11 15:02 ` Ingo Molnar
2015-06-11 15:25 ` Mel Gorman
2015-06-09 17:31 ` [PATCH 3/4] mm: Defer flush of writable TLB entries Mel Gorman
2015-06-09 20:02 ` Rik van Riel [this message]
2015-06-10 7:50 ` Ingo Molnar
2015-06-10 8:17 ` Mel Gorman
2015-06-09 17:31 ` [PATCH 4/4] mm: Send one IPI per CPU to TLB flush pages that were recently unmapped Mel Gorman
-- strict thread matches above, loose matches on Subject: below --
2015-07-06 13:39 [PATCH 0/4] TLB flush multiple pages per IPI v7 Mel Gorman
2015-07-06 13:39 ` [PATCH 3/4] mm: Defer flush of writable TLB entries Mel Gorman
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