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Re: [fuse-devel] Horrible mmap write performance (kernel writeback issue?)

Started byJakob Unterwurzacher <jakobunt@gmail.com>
First post2016-04-18 23:10 +0200
Last post2016-04-25 10:10 +0200
Articles 3 — 3 participants

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  Re: [fuse-devel] Horrible mmap write performance (kernel writeback  issue?) Jakob Unterwurzacher <jakobunt@gmail.com> - 2016-04-18 23:10 +0200
    Re: [fuse-devel] Horrible mmap write performance (kernel writeback issue?) Howard Cochran <hcochran@kernelspring.com> - 2016-04-20 03:40 +0200
      Re: [fuse-devel] Horrible mmap write performance (kernel writeback issue?) Sedat Dilek <sedat.dilek@gmail.com> - 2016-04-25 10:10 +0200

#1382047 — Re: [fuse-devel] Horrible mmap write performance (kernel writeback issue?)

FromJakob Unterwurzacher <jakobunt@gmail.com>
Date2016-04-18 23:10 +0200
SubjectRe: [fuse-devel] Horrible mmap write performance (kernel writeback issue?)
Message-ID<rpoAH-3RI-37@gated-at.bofh.it>
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

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#1382971 — Re: [fuse-devel] Horrible mmap write performance (kernel writeback issue?)

FromHoward Cochran <hcochran@kernelspring.com>
Date2016-04-20 03:40 +0200
SubjectRe: [fuse-devel] Horrible mmap write performance (kernel writeback issue?)
Message-ID<rpPhx-8ai-15@gated-at.bofh.it>
In reply to#1382047
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

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#1386088 — Re: [fuse-devel] Horrible mmap write performance (kernel writeback issue?)

FromSedat Dilek <sedat.dilek@gmail.com>
Date2016-04-25 10:10 +0200
SubjectRe: [fuse-devel] Horrible mmap write performance (kernel writeback issue?)
Message-ID<rrJKH-2lq-19@gated-at.bofh.it>
In reply to#1382971
On Wed, Apr 20, 2016 at 3:35 AM, Howard Cochran
<hcochran@kernelspring.com> wrote:
> 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.
>

What has happened to "writeback: Fix performance regression in
wb_over_bg_thresh()"?
I checked Linux v4.6-rc5, it is not included.
Is it in another Git tree? If yes, where?

- sed@ -

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