From: Chris Mason <chris.mason@oracle.com>
To: Simon Kirby <sim@hostway.ca>
Cc: linux-btrfs <linux-btrfs@vger.kernel.org>
Subject: Re: Hot rb_next, setup_cluster_no_bitmap
Date: Thu, 04 Aug 2011 10:04:29 -0400 [thread overview]
Message-ID: <1312466623-sup-3275@shiny> (raw)
In-Reply-To: <20110804013210.GC20056@hostway.ca>
Excerpts from Simon Kirby's message of 2011-08-03 21:32:10 -0400:
> Perhaps as a further clue as to what is going on, on this same backup box
> after all of the rsyncs are finished/killed and a good amount of time has
> passed (no cleaner processes running in the background or anything),
> "sync" is still consistently takes ~4 minutes to run, and pushes out a
> lot to disk every time it is run. Example:
>
> echo 3 > /proc/sys/vm/drop_caches
> sync
> echo 3 > /proc/sys/vm/drop_caches
> sync
> vmstat 1 &
> time sync
Just to confirm, the profiling during this time shows your system time
is all in rb_next?
-chris
next prev parent reply other threads:[~2011-08-04 14:04 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-03 22:06 Hot rb_next, setup_cluster_no_bitmap Simon Kirby
2011-08-03 22:39 ` Simon Kirby
2011-08-03 23:10 ` Simon Kirby
2011-08-04 1:13 ` Chris Mason
2011-08-04 1:32 ` Simon Kirby
2011-08-04 14:04 ` Chris Mason [this message]
2011-08-04 17:28 ` Simon Kirby
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