Messages in this thread | | | Date | Mon, 25 Sep 2006 17:22:40 -0700 | From | Andrew Morton <> | Subject | Re: When will the lunacy end? (Was Re: [PATCH] uswsusp: add pmops->{prepare,enter,finish} support (aka "platform mode")) |
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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. If you are lucky, that > should be slow, too... fortunately you'll have useful dmesg buffer > when you are done. CONFIG_PRINTK_TIMING or something, and you should > have enough clues...?
That would help.
> 15 seconds spend within drivers is definitely _not_ okay.
I assumed it was the same for everyone else ;) - 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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