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| author |   Sourabh Jain <sourabhjain@linux.ibm.com> | 2019-12-11 21:39:10 +0530 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2020-02-19 22:46:07 +1100 |
| commit | d8e73458f33a24810413ee3a0cd020b644de2f98 (patch) | |
| tree | 488a517b3ba91bcc04fad8ceafba596619c579f9 /Documentation | |
| parent | Documentation/ABI: Mark /sys/kernel/fadump_* sysfs files deprecated (diff) | |
| download | wireguard-linux-d8e73458f33a24810413ee3a0cd020b644de2f98.tar.xz wireguard-linux-d8e73458f33a24810413ee3a0cd020b644de2f98.zip | |
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')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-kernel-fadump | 7 | ||||
| -rw-r--r-- | Documentation/powerpc/firmware-assisted-dump.rst | 5 |
2 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-kernel-fadump b/Documentation/ABI/testing/sysfs-kernel-fadump index 5d988b919e81..8f7a64a81783 100644 --- a/Documentation/ABI/testing/sysfs-kernel-fadump +++ b/Documentation/ABI/testing/sysfs-kernel-fadump @@ -31,3 +31,10 @@ Description: write only the system is booted to capture the vmcore using FADump. It is used to release the memory reserved by FADump to save the crash dump. + +What: /sys/kernel/fadump/mem_reserved +Date: Dec 2019 +Contact: linuxppc-dev@lists.ozlabs.org +Description: read only + Provide information about the amount of memory reserved by + FADump to save the crash dump in bytes. 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 |