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On Fri, Jan 13, 2006 at 05:49:14PM -0800, Andrew Morton wrote: > Mingming Cao <cmm@us.ibm.com> wrote: > > > > On 2.6.14, the > > fall back io scheduler (if the chosen io scheduler is not found) is set > > to the default io scheduler (anticipatory, in this case), but since > > 2.6.15-rc1, this semanistic is changed to fall back to noop. > > OK. And I assume that AS wasn't compiled, so that's why it fell back? > > I actually thought that elevator= got removed, now we have > /sys/block/sda/queue/scheduler. But I guess that's not very useful with > CONFIG_SYSFS=n. It's also a lifesaver if the default scheduler happens to trigger some breakage preventing boot, and you can tell users to workaround it with a bootparam until the real problem is fixed (which has bitten us twice now, as Fedora like several other distros chooses CFQ by default). Dave - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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