Messages in this thread | | | Date | Fri, 23 Jan 2015 18:02:43 +0100 | From | Borislav Petkov <> | Subject | Re: [PATCH 3/3] x86, crash: Allocate enough low-mem when crashkernel=high |
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On Tue, Jan 06, 2015 at 03:51:14PM +0100, Joerg Roedel wrote: > From: Joerg Roedel <jroedel@suse.de> > > When the crashkernel is loaded above 4GiB in memory the > first kernel only allocates 72MiB of low-memory for the DMA > requirements of the second kernel. On systems with many > devices this is not enough and causes device driver > initialization errors and failed crash dumps. Set this > default value to 256MiB to make sure there is enough memory
This upper limit of 256 looks arbitrary. Are we going to raise it a couple of years from now if it becomes insufficient then?
It probably won't be easy but is there some more reliable way to allocate enough memory for DMA on a say per-system basis or whatever...? Probably not but let me ask it anyway.
-- Regards/Gruss, Boris.
ECO tip #101: Trim your mails when you reply. --
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