From: folkert <folkert@vanheusden.com>
To: linux-f2fs-devel@lists.sourceforge.net
Cc: udovdh@xs4all.nl
Subject: f2fs using tons of cpu
Date: Tue, 8 Oct 2013 13:25:35 +0200 [thread overview]
Message-ID: <20131008112534.GA24963@belle.intranet.vanheusden.com> (raw)
Hi,
For the last few days f2fs started to use loads of cpu on one of my
raspberry pi systems:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
2822 root 20 0 0 0 0 R 35.3 0.0 328:34.01 f2fs_gc-254:0
2826 root 20 0 0 0 0 R 35.3 0.0 327:40.07 flush-254:0
This is continuous load, the whole day.
This is to a SSD connected via USB:
Bus 001 Device 025: ID 0c45:7401 Microdia
The SSD does not support trim (that's why I put f2fs on it).
It is constantly reading (and not writing) data from the SSD it is on:
folkert@vnvnation ~ $ vmstat 2
procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
2 0 0 20744 16 375052 0 0 305774 0 413 157 0 100 0 0
2 0 0 20744 16 375052 0 0 304272 0 409 151 0 100 0 0
2 0 0 21536 16 375052 0 0 301444 0 410 163 0 100 0 0
2 0 0 21536 16 375052 0 0 305052 0 408 150 0 100 0 0
2 0 0 21536 16 375052 0 0 302994 0 407 151 0 100 0 0
2 0 0 21932 16 375052 0 0 303408 0 406 153 0 100 0 0
2 0 0 21932 16 375052 0 0 301580 0 417 152 1 99 0 0
2 0 0 21932 16 375052 0 0 304142 0 411 150 0 100 0 0
2 0 0 21932 16 375052 0 0 305944 0 409 152 0 100 0 0
2 0 0 21932 16 375052 0 0 299700 0 414 156 0 100 0 0
It has lots of free diskspace left:
folkert@vnvnation ~ $ df -h /home/folkert/backups
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/backups 118G 91G 27G 78% /home/folkert/backups
Kernel:
folkert@vnvnation ~ $ uname -r
3.9.8+
Folkert van Heusden
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next reply other threads:[~2013-10-08 11:42 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-08 11:25 folkert [this message]
2013-10-10 0:28 ` f2fs using tons of cpu Jaegeuk Kim
2013-11-09 17:29 ` folkert
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