From: Joerg Roedel Date: Wed, 10 Jun 2015 15:49:42 +0000 (+0200) Subject: x86/crash: Allocate enough low memory when crashkernel=high X-Git-Tag: omap-for-v4.2/fixes-rc1^2~173^2 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=94fb9334182284e8e7e4bcb9125c25dc33af19d4;p=pandora-kernel.git x86/crash: Allocate enough low memory when crashkernel=high When the crash kernel is loaded above 4GiB in memory, the first kernel allocates only 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. Testing by SUSE and Redhat has shown that 256MiB is a good default value for now and the discussion has lead to this value as well. So set this default value to 256MiB to make sure there is enough memory available for DMA. Signed-off-by: Joerg Roedel [ Reflow comment. ] Signed-off-by: Borislav Petkov Acked-by: Baoquan He Cc: Andrew Morton Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Brian Gerst Cc: Dave Young Cc: Denys Vlasenko Cc: H. Peter Anvin Cc: Jörg Rödel Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Vivek Goyal Cc: kexec@lists.infradead.org Link: http://lkml.kernel.org/r/1433500202-25531-4-git-send-email-joro@8bytes.org Signed-off-by: Ingo Molnar --- Reading git-diff-tree failed