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Message-ID: <4AB663B0.9070600@arcor.de> Date: Sun, 20 Sep 2009 20:17:36 +0300 From: Nikos Chantziaras <realnc@...or.de> To: Ulrich Lukas <stellplatz-nr.13a@...enparkplatz.de> CC: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Arjan van de Ven <arjan@...radead.org> Subject: Re: Poor desktop responsiveness with background I/O-operations (Please don't strip the CC list when you reply. Use the "Reply to all" functionality of your mail client and keep all CCs.) On 09/20/2009 11:50 AM, Ulrich Lukas wrote: > Arjan van de Ven wrote: >> can you try the following two things? >> >> echo 4096> /sys/block/sda/queue/nr_requests >> for i in `pidof kjournald` ; do ionice -c1 -p $i ; done > > I tried this just now, but it doesn't change things much. I can do a > more testing later today. > > >> I assume you're using CFQ. > > Yes, it's CFQ. (see .config of my previous posting) > > Filesystem is EXT4. I can also confirm total lock-up when copying a big file (Intel Core 2 Duo, Intel X38 chipset). Everything locks-up for several seconds during the copying. I'm also on ext4. I've been told on various mailing lists that this is normal, expected and unavoidable so I pretty much think the only solution is to avoid heavy I/O :P -- 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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