(cc's lovingly restored. Please do not do that) On Mon, 26 Nov 2007 07:57:00 +0300 Al Boldi <[EMAIL PROTECTED]> wrote:
> Jens Axboe wrote: > > On Sun, Nov 25 2007, Adrian Bunk wrote: > > > Is there any technical reason why we need 4 different schedulers at all? > > > > Until we have the perfect scheduler :-) > > > > With some hard work and testing, we should be able to get rid of 'as'. > > It still beats cfq for some of the workloads that deadline is good at, > > so not quite yet. > > > > > I have the gut feeling that the usual thing happens and people e.g. not > > > report some cfq problems because as works for them... > > > > There's always a risk with "duplicate", like several drivers for the > > same hardware. I'm not disputing that. > > Actually, both 'cfq' and 'as' are broken, and have been repeatedly reported > as such. Deadline is the only one that currently looks sane, and seems like > a good starting point for a more involved iosched. But keep in mind, the > fact that 'cfq' and 'as' are broken may also point to a lower-level block-io > problem. So, incrementally improving deadline may help discovering the > problems both 'cfq' and 'as' are plagued with. > Sorry, but these are vague and unuseful assertions. Please send bug reports, preferably with testcases which developers can use when fixing the bugs. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
