From 1d3f9094c6fdb5680fd3b19a5b153308d53a70ee Mon Sep 17 00:00:00 2001 From: Hendrik Brueckner Date: Mon, 17 Aug 2015 16:13:41 +0200 Subject: [PATCH] s390/sclp_vt220: support magic sysrequests Implement magic sysrequest handling for the VT220 terminal (also known as the Integrated ASCII console on the HMC/SE). To invoke a "magic sysrequest" function, press "Ctrl+o" followed by a second character that designates the debugging function. The handling of the sysrq is scheduled away from the SCLP IRQ context; because large amounts of sysrq output might fill up the console buffers. The console might deadlock because it cannot empty the buffers while still in the receiving IRQ context. This behavior is the same as for the SCLP console. Reported-by: Horst Weber Signed-off-by: Hendrik Brueckner Reviewed-by: Peter Oberparleiter Signed-off-by: Martin Schwidefsky --- Reading git-format-patch failed