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Message-ID: <47B5BC35.1000700@mnsu.edu> Date: Fri, 15 Feb 2008 10:22:13 -0600 From: "Jeffrey E. Hundstad" <jeffrey.hundstad@...u.edu> To: Lukas Hejtmanek <xhejtman@....muni.cz> CC: Jan Engelhardt <jengelh@...putergmbh.de>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: Re: Disk schedulers Lukas Hejtmanek, I have to say, that I've heard this subject before, the summary answer seems to be, that the kernel can not guess the wishes of the user 100% of the time. If you have a low priority I/O task use ionice(1) to set the priority of that task so it doesn't nuke your high priority task. I have to personal stake in this answer but I can report that for my high I/O tasks it does work like a charm. -- Jeffrey Hundstad Lukas Hejtmanek wrote: > On Fri, Feb 15, 2008 at 03:42:58PM +0100, Jan Engelhardt wrote: > >> Also consider >> - DMA (e.g. only UDMA2 selected) >> - aging disk >> > > it's not the case. > > hdparm reports udma5 is used, if it is reliable with libata. > > The disk is 3 months old, kernel does not report any errors. And it has never > been different. > > -- > Lukáš Hejtmánek > -- > 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/ > -- 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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