From: Johannes Weiner <hannes@cmpxchg.org>
To: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Cc: linux-mm@kvack.org, akpm@linux-foundation.org,
william.kucharski@oracle.com, feng.tang@intel.com,
zhengjun.xing@intel.com, rong.a.chen@intel.com,
Xing Zhengjun <zhengjun.xing@linux.intel.com>
Subject: Re: [PATCH] mm: Fix madvise WILLNEED performance problem
Date: Mon, 9 Nov 2020 11:03:09 -0500 [thread overview]
Message-ID: <20201109160309.GA807548@cmpxchg.org> (raw)
In-Reply-To: <20201109134851.29692-1-willy@infradead.org>
On Mon, Nov 09, 2020 at 01:48:51PM +0000, Matthew Wilcox (Oracle) wrote:
> The calculation of the end page index was incorrect, leading to a
> regression of 70% when running stress-ng. With this fix, we instead
> see a performance improvement of 3%.
>
> Reported-by: kernel test robot <rong.a.chen@intel.com>
> Tested-by: Xing Zhengjun <zhengjun.xing@linux.intel.com>
> Fixes: e6e88712e43b ("mm: optimise madvise WILLNEED")
> Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
prev parent reply other threads:[~2020-11-09 16:05 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-09 13:48 Matthew Wilcox (Oracle)
2020-11-09 16:03 ` Johannes Weiner [this message]
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