From: Kent Overstreet <kmo-PEzghdH756F8UrSeD/g0lQ@public.gmane.org>
To: Stefan Priebe - Profihost AG
<s.priebe-2Lf/h1ldwEHR5kwTpVNS9A@public.gmane.org>
Cc: "linux-bcache-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-bcache-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: speed up dirty data cleaning
Date: Thu, 7 Nov 2013 18:49:04 -0800 [thread overview]
Message-ID: <20131108024904.GL3842@kmo> (raw)
In-Reply-To: <527BAF4B.9080609-2Lf/h1ldwEHR5kwTpVNS9A@public.gmane.org>
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
next prev parent reply other threads:[~2013-11-08 2:49 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 [this message]
2013-11-08 7:19 ` Stefan Priebe - Profihost AG
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20131108024904.GL3842@kmo \
--to=kmo-pezghdh756f8ursed/g0lq@public.gmane.org \
--cc=linux-bcache-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=s.priebe-2Lf/h1ldwEHR5kwTpVNS9A@public.gmane.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.