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[v3,2/2] powerpc/fadump: update documentation about 'fadump_append=' parameter

Message ID 149319214354.14869.4588799382016531714.stgit@hbathini.in.ibm.com (mailing list archive)
State Superseded
Headers show

Commit Message

Hari Bathini April 26, 2017, 7:35 a.m. UTC 
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>
---
 Documentation/powerpc/firmware-assisted-dump.txt |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
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Patch

diff --git a/Documentation/powerpc/firmware-assisted-dump.txt b/Documentation/powerpc/firmware-assisted-dump.txt
index 3007bc9..8e12380 100644
--- a/Documentation/powerpc/firmware-assisted-dump.txt
+++ b/Documentation/powerpc/firmware-assisted-dump.txt
@@ -158,7 +158,11 @@  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 'fadump_reserve_mem=' kernel cmdline
+3. A user can pass additional kernel parameters as a comma separated list
+   through 'fadump_append=' parameter, to be enforced 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.