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Message-ID: <20071018220510.GA22288@petamem.com> Date: Fri, 19 Oct 2007 00:05:10 +0200 From: Richard Jelinek <rj@...amem.com> To: linux-kernel@...r.kernel.org Subject: kswapd0 inefficient? Hello guys, I'm not subscribed to this list, so if you find this question valid enough to answer it, please cc me. Thanks. This is what the top-output looks like on my machine after having copied about 550GB of data from a twofish256 crypted disk to a raid array: -------------- Mem: 8178452k total, 8132180k used, 46272k free, 2743480k buffers Swap: 0k total, 0k used, 0k free, 4563032k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 5954 root 0 -20 0 0 0 R 62 0.0 96:42.61 loop0 6014 root 18 0 23744 19m 484 R 20 0.2 25:45.31 cp 255 root 10 -5 0 0 0 S 8 0.0 10:21.82 kswapd0 6011 root 10 -5 0 0 0 D 6 0.0 4:15.66 kjournald ...yadda yadda... -------------- And what do we see here? We see loop0 and cp eating up some time. That's ok for me considered the work they do. kjournald is also ok for me, but I ask myself: why the heck has kswapd0 crunched 10+ minutes of CPU time? I mean what does kswapd0 do? http://www.linuxforums.org/forum/linux-kernel/65380-what-does-kswapd0-do.html And I have no swap - right? So it should just shut up - IMHO. Or am I missing something? kind regards, Marcel - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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