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authorSourabh Jain <sourabhjain@linux.ibm.com>2019-12-11 19:09:10 +0300
committerMichael Ellerman <mpe@ellerman.id.au>2020-02-19 14:46:07 +0300
commitd8e73458f33a24810413ee3a0cd020b644de2f98 (patch)
tree488a517b3ba91bcc04fad8ceafba596619c579f9 /Documentation/powerpc
parent3f5f1f22ef10ee0278cef1243944c93aca01b236 (diff)
downloadlinux-d8e73458f33a24810413ee3a0cd020b644de2f98.tar.xz
powerpc/fadump: sysfs for fadump memory reservation
Add a sys interface to allow querying the memory reserved by FADump for saving the crash dump. Also added Documentation/ABI for the new sysfs file. Signed-off-by: Sourabh Jain <sourabhjain@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20191211160910.21656-7-sourabhjain@linux.ibm.com
Diffstat (limited to 'Documentation/powerpc')
-rw-r--r--Documentation/powerpc/firmware-assisted-dump.rst5
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/powerpc/firmware-assisted-dump.rst b/Documentation/powerpc/firmware-assisted-dump.rst
index 2cd65a0df9b8..b3f3ee135dbe 100644
--- a/Documentation/powerpc/firmware-assisted-dump.rst
+++ b/Documentation/powerpc/firmware-assisted-dump.rst
@@ -268,6 +268,11 @@ Here is the list of files under kernel sysfs:
be handled and vmcore will not be captured. This interface can be
easily integrated with kdump service start/stop.
+ /sys/kernel/fadump/mem_reserved
+
+ This is used to display the memory reserved by FADump for saving the
+ crash dump.
+
/sys/kernel/fadump_release_mem
This file is available only when FADump is active during
second kernel. This is used to release the reserved memory