Re: [PATCH v3 0/3] powerpc/crash: protect kdump from active watchdogs

On Mon, 27 Jul 2026 11:04:13 +0530, Sourabh Jain wrote:

On pseries LPAR systems in a high-availability environment using the
SBD[1][2] service, I observed that the system abruptly rebooted before
dump capture could complete.

Further investigation showed that SBD had configured a watchdog with
a 30-second timeout. Since the kernel crashes directly into the
kdump kernel without shutting down userspace services, the watchdog
remained active during dump capture. Once the watchdog timeout
expired, PHYP reset the LPAR, causing dump capture to fail.

[...]

Applied to powerpc/next.

[1/3] powerpc/pseries: Move H_WATCHDOG definitions to a common header
      https://git.kernel.org/powerpc/c/516a254918453ec99660201263d01189c082332c
[2/3] powerpc/pseries: Handle and log pseries-wdt registration failures
      https://git.kernel.org/powerpc/c/e65b526affa621b50646cafdf6b06505af07032e
[3/3] powerpc/crash: stop watchdogs before booting kdump kernel
      https://git.kernel.org/powerpc/c/fb43ba4256543ce18ca0540fc37022bda438a293

cheers