linux-kernel - [mm] Crashkernel memory reservation fails with 2.6.24-rc8-mm1

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Date:	Mon, 04 Feb 2008 21:41:11 +0530
From:	"Sachin P. Sant" <sachinp@...ibm.com>
To:	linux-kernel <linux-kernel@...r.kernel.org>
CC:	Vivek Goyal <vgoyal@...hat.com>, kexec@...ts.infradead.org
Subject: [mm] Crashkernel memory reservation fails with 2.6.24-rc8-mm1

While trying to configure kdump with 2.6.24-rc8-mm1 [ on a x86-64 box ]
i ran into this problem. Here is the snippet from dmesg during the
failure. [ dmesg log attached ]

early_ioremap(000000000000040e, 00000002) => -000002103442418
early_iounmap(ffffffff82a0040e, 00000002)
early_ioremap(000000000009dc00, 00001000) => -000002102797312
early_iounmap(ffffffff82a9dc00, 00001000)
crashkernel reservation failed - memory is in use
 [ffffe20000000000-ffffe200001fffff] PMD ->ffff810001200000 on node 0
 [ffffe20000200000-ffffe200003fffff] PMD ->ffff810001600000 on node 0
 [ffffe20000400000-ffffe200005fffff] PMD ->ffff810001a00000 on node 0
 [ffffe20000600000-ffffe200007fffff] PMD ->ffff810001e00000 on node 0

I am using 128M@32M value for crashkernel parameter.

Thanks
-Sachin

View attachment "dmesg-log-2624rc8mm1" of type "text/plain" (10853 bytes)