From: Stefan Priebe - Profihost AG <s.priebe-2Lf/h1ldwEHR5kwTpVNS9A@public.gmane.org>
To: Kent Overstreet <kmo-PEzghdH756F8UrSeD/g0lQ@public.gmane.org>
Cc: "linux-bcache-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-bcache-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: speed up dirty data cleaning
Date: Fri, 08 Nov 2013 08:19:08 +0100 [thread overview]
Message-ID: <527C906C.8000905@profihost.ag> (raw)
In-Reply-To: <20131108024904.GL3842@kmo>
Am 08.11.2013 03:49, schrieb Kent Overstreet:
> On Thu, Nov 07, 2013 at 04:18:35PM +0100, Stefan Priebe - Profihost AG wrote:
>> After some time it seems to start writing out all the data at a good
>> disk speed.
>>
>> But how does bcache determine when to write which kind of data out of
>> bcache.
>
> There's a PD controller that tries to keep the amount of dirty data at
> writeback_percent percentage of your cache size. But, since the dirty data
> account was _still_ broken, that would screw up that PD controller.
>
> Workaround is to set writeback_percent to 0
Tried that but it doesn't seem to start cleaning correctly.
Stefan
prev parent reply other threads:[~2013-11-08 7:19 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-07 13:09 speed up dirty data cleaning Stefan Priebe - Profihost AG
[not found] ` <527B90EF.10404-2Lf/h1ldwEHR5kwTpVNS9A@public.gmane.org>
2013-11-07 15:18 ` Stefan Priebe - Profihost AG
[not found] ` <527BAF4B.9080609-2Lf/h1ldwEHR5kwTpVNS9A@public.gmane.org>
2013-11-08 2:49 ` Kent Overstreet
2013-11-08 7:19 ` Stefan Priebe - Profihost AG [this message]
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