lkml.org 
[lkml]   [2015]   [Jan]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 3/3] x86, crash: Allocate enough low-mem when crashkernel=high
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.
--


\
 
 \ /
  Last update: 2015-01-23 18:21    [W:0.225 / U:0.024 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site