Re: [PATCH v2 0/3] powerpc/crash: protect kdump from active watchdogs
From: Sourabh Jain <hidden>
Date: 2026-07-13 05:59:34
Also in:
stable
On 13/07/26 10:51, Ritesh Harjani (IBM) wrote:
Sourabh Jain [off-list ref] writes:quoted
Changelog: ========== v2: - Move H_WATCHDOG definitions to a common header for shared use across pseries code. 1/3 - Added a new patch to handle pseries watchdog device registration failure. 2/3 - Stop active watchdogs in crash hanlder. 3/3 Ritesh - Add suggested-by tag 1/3 & 3/3Reviewed the changes and mostly looks good with some minor nits added to the individual patches. Small request - Could you please also update test results with v3 in your changelog (since you mentioned we are able to reproduce the issue easily with your test code).
I tested this fix with the program I shared in cover letter. The watchdog was successfully stopped even when H_WATCHDOG is called form crash handler. I will share my test details in v3 cover letter also.
aah one other thing I just noticed since you are ccing stable and you added a Fixes tag in patch-3. Patch-3 alone cannot be easily backported now due to patch-1 and patch-2. There must be a way to define the dependencies if you are looking for backporting the fix patch to stable tree, please check that and follow that accordingly in v3.
I thought about that as well, but since they are part of the same patch series, I assumed they would be picked together. However, I don't think that will work in all cases. I checked the older commits and noticed that a backport note was added. I think we can do the same for the fix patch. I'll add a note indicating that the following patches should be backported first: powerpc/pseries: Move H_WATCHDOG definitions to a common header powerpc/pseries: Handle and log pseries-wdt registration failures Since these patches are not upstream yet, I'll refer to them by their commit titles. Does that look good to you? - Sourabh Jain