From: Michal Suchanek <msuchanek@suse.de>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>,
Jonathan Corbet <corbet@lwn.net>,
Hari Bathini <hbathini@linux.vnet.ibm.com>,
Michal Suchanek <msuchanek@suse.de>,
Vlastimil Babka <vbabka@suse.cz>, Michal Hocko <mhocko@suse.cz>,
linuxppc-dev@lists.ozlabs.org, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v4 RFT 2/2] powerpc/fadump: update documentation about 'fadump_append=' parameter
Date: Tue, 2 May 2017 17:56:11 +0200 [thread overview]
Message-ID: <20170502155611.6789-2-msuchanek@suse.de> (raw)
In-Reply-To: <20170502155611.6789-1-msuchanek@suse.de>
With the introduction of 'fadump_append=' parameter to pass additional
parameters to fadump (capture) kernel, update documentation about it.
Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com>
Signed-off-by: Michal Suchanek <msuchanek@suse.de>
---
Documentation/powerpc/firmware-assisted-dump.txt | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/Documentation/powerpc/firmware-assisted-dump.txt b/Documentation/powerpc/firmware-assisted-dump.txt
index 9cabaf8..99ab8f4 100644
--- a/Documentation/powerpc/firmware-assisted-dump.txt
+++ b/Documentation/powerpc/firmware-assisted-dump.txt
@@ -162,7 +162,11 @@ How to enable firmware-assisted dump (fadump):
1. Set config option CONFIG_FA_DUMP=y and build kernel.
2. Boot into linux kernel with 'fadump=on' kernel cmdline option.
-3. Optionally, user can also set 'crashkernel=' kernel cmdline
+3. A user can pass additional kernel parameters as a comma separated list
+ through 'fadump_append=' parameter, to be be appended when fadump is active.
+ This can be used to pass parameters like nr_cpus=1, numa=off to reduce
+ memory consumption during dump capture.
+4. Optionally, user can also set 'fadump_reserve_mem=' kernel cmdline
to specify size of the memory to reserve for boot memory dump
preservation.
@@ -172,6 +176,8 @@ NOTE: 1. 'fadump_reserve_mem=' parameter has been deprecated. Instead
2. If firmware-assisted dump fails to reserve memory then it
will fallback to existing kdump mechanism if 'crashkernel='
option is set at kernel cmdline.
+ 3. 'fadump_append=' parameter con be quoted to append multiple arguments
+ as in 'fadump_append="nr_cpus=8 numa=off"'
Sysfs/debugfs files:
------------
--
2.10.2
next prev parent reply other threads:[~2017-05-02 15:57 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-02 15:56 [PATCH v4 RFT 1/2] powerpc/fadump: reduce memory consumption for capture kernel Michal Suchanek
2017-05-02 15:56 ` Michal Suchanek [this message]
2017-05-02 16:44 ` Hari Bathini
2017-05-03 7:13 ` Hari Bathini
2017-05-03 8:49 ` Hari Bathini
2017-05-10 14:58 ` Michal Suchánek
2017-05-10 15:10 ` Hari Bathini
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