Re: [PATCH v2 0/3] serial: 8250: fix BREAK+SysRq dispatch on guard()-locked IRQ handlers

[Maciej W. Rozycki]

On Wed, 13 May 2026, Jacques Nilo wrote:

> This series fixes a silent regression where a SysRq character entered as
> BREAK + key on the serial console is consumed by the kernel but never
> dispatched to handle_sysrq(). Same description as v1 [1].

 Thanks for the report and working on a fix.  This issue hit me hard last 
week when chasing a bug with one of my systems where my debug hacks caused 
me to become unable to become root and reboot the system properly.  To my 
surprise I was unable to access any of the magic SysRq features either and 
consequently I had to power-cycle the system remotely via a PDU (it's some 
1600km/1000mi away).  I've now verified that 1/3 and 2/3 bring the feature 
back with patched 7.0.0 and said x86 PC.  No way to verify 3/3 though.

  Maciej