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From: Yinghai Lu <>
To: Thomas Gleixner <>, Ingo Molnar <>,
	"H. Peter Anvin" <>
Cc: WANG Chao <>, Vivek Goyal <>,
	"Eric W. Biederman" <>,
Subject: [PATCH -v6 0/4] x86, kdump: Fix crashkernel high with old kexec-tools
Date: Mon, 15 Apr 2013 22:23:44 -0700
Message-ID: <> (raw)

Vivek found some problems with old kexec-tools.

We keep the old crashkernel=X to old behavoir, so it will not break
old kexec-tools.
Add crashkernel=X,high to support new kexec-tools that supports loading high.
when high is used, memblock will search from top to low.
if the allocated one is above 4G, kernel will try to auto allocate
72M under 4G for swiotlb.
user could crashkernel=Y,low to change 72M to other value.

-v2:	reorder the patch sequences
	crashkernel=X,high, crashkernel=Y,low only handle simple form.
	crashkernel=X will override crashkernel=X;high crashkernel=Y;low
-v3:	update description in kernel-parameters.txt
	update get_last_crashkernel and _simple checking about suffix.
-v4:	update to use ,high again, and also not abuse parse_crashkernel_simple
-v5:	tight checking about crashkernel=X,highextra,high
-v6:	update one comments according to hpa.



             reply index

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-04-16  5:23 Yinghai Lu [this message]
2013-04-16  5:23 ` [PATCH v6 1/4] x86, kdump: Set crashkernel_low automatically Yinghai Lu
2013-04-17 22:53   ` [tip:x86/kdump] " tip-bot for Yinghai Lu
2013-04-16  5:23 ` [PATCH v6 4/4] kexec: use Crash kernel for Crash kernel low Yinghai Lu
2013-04-17 22:57   ` [tip:x86/kdump] " tip-bot for Yinghai Lu
2013-04-16  5:23 ` [PATCH v6 2/4] x86, kdump: Retore crashkernel= to allocate under 896M Yinghai Lu
2013-04-17 22:54   ` [tip:x86/kdump] " tip-bot for Yinghai Lu
2013-04-16  5:23 ` [PATCH v6 3/4] x86, kdump: Change crashkernel_high/low= to crashkernel=,high/low Yinghai Lu
2013-04-17 22:55   ` [tip:x86/kdump] " tip-bot for Yinghai Lu

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