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
