All existing kexec and kdump sysfs entries are moved to a new location,
/sys/kernel/kexec, to keep /sys/kernel/ clean and better organized.
Symlinks are created at the old locations for backward compatibility and
can be removed in the future [02/05].
While doing this cleanup, missing ABI documentation for the old sysfs
interfaces is added, and those entries are marked as deprecated
[01/05 and 03/05]. New ABI documentation is also added for the
reorganized interfaces. [04/05]
Along with this reorganization, a new sysfs file,
/sys/kernel/kexec/crash_cma_ranges, is introduced to export crashkernel
CMA reservation details to user space [05/05]. This helps tools determine the
total crashkernel reserved memory and warn users that capturing user
pages while CMA is reserved may cause incomplete or unreliable dumps.
Changlog:
---------
v2 -> v3:
- Add the missing hunk to export crash_cma_ranges sysfs [05/05]
- Declare kexec_kobj static [02/05]
Cc: Aditya Gupta <adityag@linux.ibm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Baoquan he <bhe@redhat.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Hari Bathini <hbathini@linux.ibm.com>
Cc: Jiri Bohac <jbohac@suse.cz>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Mahesh J Salgaonkar <mahesh@linux.ibm.com>
Cc: Pingfan Liu <piliu@redhat.com>
Cc: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Cc: Shivang Upadhyay <shivangu@linux.ibm.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: kexec@lists.infradead.org
Sourabh Jain (5):
Documentation/ABI: add kexec and kdump sysfs interface
kexec: move sysfs entries to /sys/kernel/kexec
Documentation/ABI: mark old kexec sysfs deprecated
kexec: document new kexec and kdump sysfs ABIs
crash: export crashkernel CMA reservation to userspace
.../ABI/obsolete/sysfs-kernel-kexec-kdump | 59 ++++++++
.../ABI/testing/sysfs-kernel-kexec-kdump | 61 ++++++++
kernel/kexec_core.c | 135 ++++++++++++++++++
kernel/ksysfs.c | 68 +--------
4 files changed, 256 insertions(+), 67 deletions(-)
create mode 100644 Documentation/ABI/obsolete/sysfs-kernel-kexec-kdump
create mode 100644 Documentation/ABI/testing/sysfs-kernel-kexec-kdump
--
2.51.1