Messages in this thread | | | From | "Rafael J. Wysocki" <> | Subject | Re: When will the lunacy end? (Was Re: [PATCH] uswsusp: add pmops->{prepare,enter,finish} support (aka "platform mode")) | Date | Tue, 26 Sep 2006 21:46:15 +0200 |
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On Tuesday, 26 September 2006 02:22, Andrew Morton wrote: > On Tue, 26 Sep 2006 01:21:51 +0200 > Pavel Machek <pavel@ucw.cz> wrote: > > > Hi! > > > > On Mon 2006-09-25 16:06:48, Andrew Morton wrote: > > > On Tue, 26 Sep 2006 00:45:00 +0200 > > > Pavel Machek <pavel@ucw.cz> wrote: > > > > > > > Anyways this boils down to "find which drivers are delaying suspend > > > > and fix them". > > > > > > The first step would be "find some way of identifying where all the time is > > > being spent". > > > > > > Right now, netconsole gets disabled (or makes the machine hang) and most of > > > these machines don't have serial ports and the printk buffer gets lost > > > during resume. > > > > > > The net result is that the machine takes a long time to suspend and resume, > > > and you don't have a clue *why*. > > > > > > And this is a significant issue, IMO. In terms of > > > niceness-of-user-interface, being able to suspend in twelve seconds instead > > > of twenty seven rates fairly highly... > > > > Your machines spend 15 seconds in drivers? Ouch, I did not realize > > _that_. > > > > (My machine suspends in 7 seconds, perhaps 2-3 of that are playing > > with drivers, so I just failed to see where the problem is). > > > > Are these your big SMP servers? Any SCSI involved? > > It's my long-suffering Vaio laptop. > > > Rafael has "fakesuspend" patches somewhere, but you can probably just > > swapoff -a, then echo disk > /sys/power/state.
Eg. here: http://marc.theaimsgroup.com/?l=linux-acpi&m=115506915023030&q=raw (with the usage info).
Greetings, Rafael
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