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Date: Tue, 19 Apr 2016 21:35:38 -0400
Message-ID: <CAEvdpX2F7Wu6eHTEe3LatFPRb7mhtu8EWHyokr310MWpRErQUA@mail.gmail.com>
Subject: Re: [fuse-devel] Horrible mmap write performance (kernel writeback issue?)
From: Howard Cochran <hcochran@kernelspring.com>
To: Jakob Unterwurzacher <jakobunt@gmail.com>
Cc: Tejun Heo <tj@kernel.org>, Ashish Sangwan <ashishsangwan2@gmail.com>,
        Miklos Szeredi <miklos@szeredi.hu>,
        fuse-devel <fuse-devel@lists.sourceforge.net>,
        Linux-Fsdevel <linux-fsdevel@vger.kernel.org>,
        Kernel Mailing List <linux-kernel@vger.kernel.org>
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On Mon, Apr 18, 2016 at 5:06 PM, Jakob Unterwurzacher
<jakobunt@gmail.com> wrote:
> On 12.04.2016 13:09, Tejun Heo wrote:
>>>
>>> Probably you want to look into:
>>> https://lkml.org/lkml/2016/3/10/21
>>>
>>> The patch mentioned above solves the issue for me.
>>
>> Heh, I tracked it down to wb_over_bg_thresh() and fell asleep.  Yeah,
>> that is the right fix.
>
> Works wonderfully now, thanks to everybody involved. Is it too late for 4.6?
>
> Best regards,
> Jakob
>
Jakob, et. al.

You're welcome.  That performance problem stumped me for a couple of
weeks until tracked it down and submitted the fix.

Howard