Messages in this thread | | | Subject | Re: [PATCH v8]: Improve performance of LZO/plain hibernation | Date | Thu, 13 Oct 2011 22:00:28 +1100 | From | "Bojan Smojver" <> |
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------- Original message ------- > From: Rafael J. Wysocki
>> I get a kernel panic on a test box using a x86_64 kernel with this patch >> applied. > > The panic happens during late resume, when trying to switch to the > hibernated > kernel.
In an effort to test this whole thing a bit more, I took today's kernel from Linus' repo and applied v11 of my patch. I compiled this on a single cpu machine this time, with 768 MB of memory (in today's terms, this laptop would not pass as a smartphone :-), running F-16 beta.. The system has radeon graphics (my other system, where I initially developed the patch, has intel). Also, this was a 32-bit box, as opposed to my other system, which is 64-bit.
I was getting kernel trouble on repeated hibernate/thaw cycles on both systems when KMS was enabled. With nomodeset passed into the kernel, both systems would go through 50+ cycles (this was my test loop) with no trouble. Whether my patch was applied or not didn't matter - I was getting trouble with Fedora supplied kernels as well, after a few cycles.
So, I don't know for sure, but it seems to me something is amiss in KMS when it comes to hibernation.
-- Bojan
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