On Wed, 2025-10-15 at 14:36 +0800, lirongqing wrote: > From: Li RongQing <[email protected]> > > Currently, when 'hung_task_panic' is enabled, the kernel panics > immediately upon detecting the first hung task. However, some hung > tasks are transient and allow system recovery, while persistent hangs > should trigger a panic when accumulating beyond a threshold. > > Extend the 'hung_task_panic' sysctl to accept a threshold value > specifying the number of hung tasks that must be detected before > triggering a kernel panic. This provides finer control for environments > where transient hangs may occur but persistent hangs should be fatal. > > The sysctl now accepts: > - 0: don't panic (maintains original behavior) > - 1: panic on first hung task (maintains original behavior) > - N > 1: panic after N hung tasks are detected in a single scan > > This maintains backward compatibility while providing flexibility for > different hang scenarios. > > Signed-off-by: Li RongQing <[email protected]> > Cc: Andrew Jeffery <[email protected]> > Cc: Anshuman Khandual <[email protected]> > Cc: Arnd Bergmann <[email protected]> > Cc: David Hildenbrand <[email protected]> > Cc: Florian Wesphal <[email protected]> > Cc: Jakub Kacinski <[email protected]> > Cc: Jason A. Donenfeld <[email protected]> > Cc: Joel Granados <[email protected]> > Cc: Joel Stanley <[email protected]> > Cc: Jonathan Corbet <[email protected]> > Cc: Kees Cook <[email protected]> > Cc: Lance Yang <[email protected]> > Cc: Liam Howlett <[email protected]> > Cc: Lorenzo Stoakes <[email protected]> > Cc: "Masami Hiramatsu (Google)" <[email protected]> > Cc: "Paul E . McKenney" <[email protected]> > Cc: Pawan Gupta <[email protected]> > Cc: Petr Mladek <[email protected]> > Cc: Phil Auld <[email protected]> > Cc: Randy Dunlap <[email protected]> > Cc: Russell King <[email protected]> > Cc: Shuah Khan <[email protected]> > Cc: Simon Horman <[email protected]> > Cc: Stanislav Fomichev <[email protected]> > Cc: Steven Rostedt <[email protected]> > --- > diff with v3: comments modification, suggested by Lance, Masami, Randy and > Petr > diff with v2: do not add a new sysctl, extend hung_task_panic, suggested by > Kees Cook > > Documentation/admin-guide/kernel-parameters.txt | 20 > +++++++++++++------- > Documentation/admin-guide/sysctl/kernel.rst | 9 +++++---- > arch/arm/configs/aspeed_g5_defconfig | 2 +-
For the aspeed_g5_defconfig change: Acked-by: Andrew Jeffery <[email protected]>
