[prev in list] [next in list] [prev in thread] [next in thread] 

List:       linux-btrfs
Subject:    flush-btrfs-1 doing 1MiB/s (avg) writing on idle system??
From:       marcel partap <mpartap () gmx ! net>
Date:       2010-08-04 16:37:50
Message-ID: 4C59975E.9020904 () gmx ! net
[Download RAW message or body]

Dear BTRFS devs,
still trying to find the cause for https://bugzilla.kernel.org/show_bug.cgi?id=12309 \
i stumbled over the strange fact that the  flush-btrfs-1 thread is writing about \
1MiBps constantly onto my root fs, even after turning off io-prone BOINC and NTOP.. \
there are  other threads doing minor IO but that seems unrelated.
My kernel is
> Linux handtuch 2.6.35 #1 SMP PREEMPT Mon Aug 2 13:55:56 CEST 2010 x86_64 AMD \
> Phenom(tm) II X4 920 Processor AuthenticAMD GNU/Linux
with patch #488 from mentioned bug report applied. The partition is mounted
> /dev/root on / type btrfs (rw,noatime,noacl)
and btrfs filesystem show /dev/sda2 gives
> Label: none  uuid: 50719157-1813-4552-bcd5-65f85649e503
> Total devices 1 FS bytes used 230.12GB
> devid    1 size 465.58GB used 335.29GB path /dev/sda2
> Btrfs v0.19-16-g075587c-dirty
I have uploaded an archived blktrace for about 10 minutes at
http://hfopi.org/files/temp/btrfs-blktrace-idle.tar.bz2 (18M)
and the resulting diagram is
http://hfopi.org/files/temp/btrfs-blktrace-idle-trace.png
As i couldn't find an easy way to see what actually is located at these blocknumbers \
i am now kindly asking for assistance here -  can anyone make any sense out of this? \
It surely makes me feel a lil' uncomfortable about my system's kosherness.. best \
regards, marcel ;)
--
To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[prev in list] [next in list] [prev in thread] [next in thread]