From d8e73458f33a24810413ee3a0cd020b644de2f98 Mon Sep 17 00:00:00 2001 From: Sourabh Jain Date: Wed, 11 Dec 2019 21:39:10 +0530 Subject: 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 Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20191211160910.21656-7-sourabhjain@linux.ibm.com --- Documentation/powerpc/firmware-assisted-dump.rst | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'Documentation/powerpc') 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 -- cgit v1.2.3