Messages in this thread |  | | Date | Thu, 11 Feb 2010 00:11:00 +0000 | Subject | Re: slow resume from suspend to disk | From | Pedro Ribeiro <> |
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On 10 February 2010 23:40, Mihai Donțu <mihai.dontu@gmail.com> wrote: > Hi, > > Is there any way to speed up the resume from suspend to disk? Currently, on my > laptop it suspends in ~15s (wrote about 360MB) but resumes in ~120s and after > that I'm still left with ~361MB in swap: > > total used free shared buffers cached > Mem: 3333472 1139332 2194140 0 12808 473084 > -/+ buffers/cache: 653440 2680032 > Swap: 2104472 369428 1735044 > > Right now I'm better off with a cold boot. > > Although I did not study the kernel code to see how things really work, I > suspect on resume only necessary kernel data is loaded from swap and the > userland tasks are left with the page fault mechanism to bring back their own > data, which leads to an I/O storm on the swap device. Maybe changing the I/O > scheduler from CFQ would help? or better yet, is there any way to tell the > kernel to bring back all the pages from swap in one quick move? That would be > something I want to put in my resume scripts. > > $ uname -a > Linux mdontu-dell 2.6.32-gentoo-r3 #1 SMP PREEMPT Mon Feb 1 02:36:01 EET 2010 > x86_64 Intel(R) Core(TM)2 CPU T5500 @ 1.66GHz GenuineIntel GNU/Linux > > I've installed Windows XP just for a test, started a few apps (like visual > studio, mplayer, etc.) and then suspended/hibernated (~15s). It took roughly > 15s to come back. > > Thanks, > > PS: I'm editing this e-mail as I do tests and I just noticed that my /sbin > directory is empty. rmmod is there and I needed it to reload the b43 driver > which generally does not feel well after a suspend/resume. A reboot fixed it. > Weird ... > > -- > Mihai Donțu > -- > 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/ >
If you know how to patch and compile a kernel, try http://www.tuxonice.net/ I find it way faster and more reliable than the in-kernel hibernation.
You also need to install at least the hibernate script, since it is way better for hibernation that pm-utils which most distros use.
Ubuntu and some other distros have binary kernels already patched and the hibernate script packaged.
Regards, Pedro -- 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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