linux-kernel - [PATCH v6 0/3] kexec: reorganize kexec and kdump sysfs

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Message-ID: <20251118114507.1769455-1-sourabhjain@linux.ibm.com>
Date: Tue, 18 Nov 2025 17:15:04 +0530
From: Sourabh Jain <sourabhjain@...ux.ibm.com>
To: linux-kernel@...r.kernel.org
Cc: Sourabh Jain <sourabhjain@...ux.ibm.com>,
        Aditya Gupta <adityag@...ux.ibm.com>,
        Andrew Morton <akpm@...ux-foundation.org>, Baoquan he <bhe@...hat.com>,
        Dave Young <dyoung@...hat.com>, Hari Bathini <hbathini@...ux.ibm.com>,
        Jiri Bohac <jbohac@...e.cz>, Madhavan Srinivasan <maddy@...ux.ibm.com>,
        Mahesh J Salgaonkar <mahesh@...ux.ibm.com>,
        Pingfan Liu <piliu@...hat.com>,
        "Ritesh Harjani (IBM)" <ritesh.list@...il.com>,
        Shivang Upadhyay <shivangu@...ux.ibm.com>,
        Vivek Goyal <vgoyal@...hat.com>, linuxppc-dev@...ts.ozlabs.org,
        kexec@...ts.infradead.org
Subject: [PATCH v6 0/3] kexec: reorganize kexec and kdump sysfs

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 [01/03].

While doing this cleanup, the old kexec and kdump sysfs entries are
marked as deprecated in the existing ABI documentation [02/03]. This
makes it clear that these older interfaces should no longer be used.
New ABI documentation is added to describe the reorganized interfaces
[03/03], so users and tools can rely on the updated sysfs interfaces
going forward.

Changlog:
---------

v4 -> v5:
 https://lore.kernel.org/all/20251114152550.ac2dd5e23542f09c62defec7@linux-foundation.org/
 - Splitted patch series from the above patch series

v5 -> v6:
 - Move /sys/kernel/kexec_crash_cma_ranges also to new /sys/kernel/kexec node
 - Update commit messages

Note:
This patch series is dependent on the patches:
https://lore.kernel.org/all/20251117035153.1199665-1-sourabhjain@linux.ibm.com/
https://lore.kernel.org/all/20251118071023.1673329-1-sourabhjain@linux.ibm.com/

Cc: Aditya Gupta <adityag@...ux.ibm.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Baoquan he <bhe@...hat.com>
Cc: Dave Young <dyoung@...hat.com>
Cc: Hari Bathini <hbathini@...ux.ibm.com>
Cc: Jiri Bohac <jbohac@...e.cz>
Cc: Madhavan Srinivasan <maddy@...ux.ibm.com>
Cc: Mahesh J Salgaonkar <mahesh@...ux.ibm.com>
Cc: Pingfan Liu <piliu@...hat.com>
Cc: Ritesh Harjani (IBM) <ritesh.list@...il.com>
Cc: Shivang Upadhyay <shivangu@...ux.ibm.com>
Cc: Sourabh Jain <sourabhjain@...ux.ibm.com>
Cc: Vivek Goyal <vgoyal@...hat.com>
Cc: linuxppc-dev@...ts.ozlabs.org
Cc: kexec@...ts.infradead.org

Sourabh Jain (3):
  kexec: move sysfs entries to /sys/kernel/kexec
  Documentation/ABI: mark old kexec sysfs deprecated
  Documentation/ABI: new kexec and kdump sysfs interface

 .../ABI/obsolete/sysfs-kernel-kexec-kdump     |  71 +++++++++
 .../ABI/testing/sysfs-kernel-kexec-kdump      |  26 ++--
 kernel/kexec_core.c                           | 141 ++++++++++++++++++
 kernel/ksysfs.c                               |  89 +----------
 4 files changed, 230 insertions(+), 97 deletions(-)
 create mode 100644 Documentation/ABI/obsolete/sysfs-kernel-kexec-kdump

-- 
2.51.1