From: "Ahmed S. Darwish" <darwish.07@gmail.com> To: Randy Dunlap <rdunlap@xenotime.net>, Vivek Goyal <vgoyal@redhat.com>, Haren Myneni <hbabu@us.ibm.com> Cc: Eric Biederman <ebiederm@xmission.com>, kexec@lists.infradead.org, LKML <linux-kernel@vger.kernel.org>, linux-doc@vger.kernel.org Subject: [PATCH -next] Documentation: Improve crashkernel= description Date: Sun, 6 Feb 2011 17:41:08 +0200 [thread overview] Message-ID: <20110206154108.GA16542@laptop> (raw) (Also applicable over 2.6.38-rc3) Had to explore two C code files to make sense of the 'crashkernel=' kernel parameter values. Improve the situation. Signed-off-by: Ahmed S. Darwish <darwish.07@gmail.com> --- diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 89835a4..8f26b42 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -545,9 +545,12 @@ and is between 256 and 4096 characters. It is defined in the file Format: <first_slot>,<last_slot>,<port>,<enum_bit>[,<debug>] - crashkernel=nn[KMG]@ss[KMG] - [KNL] Reserve a chunk of physical memory to - hold a kernel to switch to with kexec on panic. + crashkernel=size[KMG][@offset[KMG]] + [KNL] Using kexec, Linux can switch to a 'crash kernel' + upon panic. This parameter reserves the physical + memory region [offset, offset + size] for that kernel + image. If the '@offset' part was ignored, Linux finds + a suitable crash image start address automatically. crashkernel=range1:size1[,range2:size2,...][@offset] [KNL] Same as above, but depends on the memory regards, -- Darwish http://darwish.07.googlepages.com
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From: "Ahmed S. Darwish" <darwish.07@gmail.com> To: Randy Dunlap <rdunlap@xenotime.net>, Vivek Goyal <vgoyal@redhat.com>, Haren Myneni <hbabu@us.ibm.com> Cc: linux-doc@vger.kernel.org, kexec@lists.infradead.org, Eric Biederman <ebiederm@xmission.com>, LKML <linux-kernel@vger.kernel.org> Subject: [PATCH -next] Documentation: Improve crashkernel= description Date: Sun, 6 Feb 2011 17:41:08 +0200 [thread overview] Message-ID: <20110206154108.GA16542@laptop> (raw) (Also applicable over 2.6.38-rc3) Had to explore two C code files to make sense of the 'crashkernel=' kernel parameter values. Improve the situation. Signed-off-by: Ahmed S. Darwish <darwish.07@gmail.com> --- diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 89835a4..8f26b42 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -545,9 +545,12 @@ and is between 256 and 4096 characters. It is defined in the file Format: <first_slot>,<last_slot>,<port>,<enum_bit>[,<debug>] - crashkernel=nn[KMG]@ss[KMG] - [KNL] Reserve a chunk of physical memory to - hold a kernel to switch to with kexec on panic. + crashkernel=size[KMG][@offset[KMG]] + [KNL] Using kexec, Linux can switch to a 'crash kernel' + upon panic. This parameter reserves the physical + memory region [offset, offset + size] for that kernel + image. If the '@offset' part was ignored, Linux finds + a suitable crash image start address automatically. crashkernel=range1:size1[,range2:size2,...][@offset] [KNL] Same as above, but depends on the memory regards, -- Darwish http://darwish.07.googlepages.com _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec
next reply other threads:[~2011-02-06 15:41 UTC|newest] Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top 2011-02-06 15:41 Ahmed S. Darwish [this message] 2011-02-06 15:41 ` [PATCH -next] Documentation: Improve crashkernel= description Ahmed S. Darwish 2011-02-06 21:57 ` Simon Horman 2011-02-06 21:57 ` Simon Horman 2011-02-07 2:25 ` Rob Landley 2011-02-07 2:25 ` Rob Landley 2011-02-07 2:35 ` Eric W. Biederman 2011-02-07 2:35 ` Eric W. Biederman 2011-02-07 2:42 ` Simon Horman 2011-02-07 2:42 ` Simon Horman 2011-02-07 14:33 ` Vivek Goyal 2011-02-07 14:33 ` Vivek Goyal 2011-02-07 10:59 ` WANG Cong 2011-02-07 4:14 ` Randy Dunlap 2011-02-07 4:14 ` Randy Dunlap 2011-02-07 11:30 ` [PATCH v2 " Ahmed S. Darwish 2011-02-07 11:30 ` Ahmed S. Darwish 2011-02-07 11:41 ` Simon Horman 2011-02-07 11:41 ` Simon Horman 2011-02-07 14:25 ` Vivek Goyal 2011-02-07 14:25 ` Vivek Goyal 2011-02-07 16:01 ` [PATCH v3 " Ahmed S. Darwish 2011-02-07 16:01 ` Ahmed S. Darwish 2011-02-08 18:50 ` Randy Dunlap 2011-02-08 18:50 ` Randy Dunlap
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