The patch titled panic: panic=-1 for immediate reboot has been removed from the -mm tree. Its filename was panic-panic=-1-for-immediate-reboot.patch This patch was dropped because it was merged into mainline or a subsystem tree The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: panic: panic=-1 for immediate reboot From: Hugh Dickins <hughd@xxxxxxxxxxxx> When kernel BUG or oops occurs, ChromeOS intends to panic and immediately reboot, with stacktrace and other messages preserved in RAM across reboot. But the longer we delay, the more likely the user is to poweroff and lose the info. panic_timeout (seconds before rebooting) is set by panic= boot option or sysctl or /proc/sys/kernel/panic; but 0 means wait forever, so at present we have to delay at least 1 second. Let a negative number mean reboot immediately (with the small cosmetic benefit of suppressing that newline-less "Rebooting in %d seconds.." message). Signed-off-by: Hugh Dickins <hughd@xxxxxxxxxxxx> Signed-off-by: Mandeep Singh Baines <msb@xxxxxxxxxxxx> Cc: Huang Ying <ying.huang@xxxxxxxxx> Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx> Cc: Hugh Dickins <hughd@xxxxxxxxxx> Cc: Olaf Hering <olaf@xxxxxxxxx> Cc: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx> Cc: Dave Airlie <airlied@xxxxxxxxx> Cc: Greg Kroah-Hartman <gregkh@xxxxxxx> Cc: Alan Cox <alan@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- Documentation/kernel-parameters.txt | 4 +++- kernel/panic.c | 2 ++ 2 files changed, 5 insertions(+), 1 deletion(-) diff -puN Documentation/kernel-parameters.txt~panic-panic=-1-for-immediate-reboot Documentation/kernel-parameters.txt --- a/Documentation/kernel-parameters.txt~panic-panic=-1-for-immediate-reboot +++ a/Documentation/kernel-parameters.txt @@ -1846,7 +1846,9 @@ bytes respectively. Such letter suffixes See Documentation/sound/oss/oss-parameters.txt panic= [KNL] Kernel behaviour on panic: delay <timeout> - seconds before rebooting + timeout > 0: seconds before rebooting + timeout = 0: wait forever + timeout < 0: reboot immediately Format: <timeout> parkbd.port= [HW] Parallel port number the keyboard adapter is diff -puN kernel/panic.c~panic-panic=-1-for-immediate-reboot kernel/panic.c --- a/kernel/panic.c~panic-panic=-1-for-immediate-reboot +++ a/kernel/panic.c @@ -119,6 +119,8 @@ NORET_TYPE void panic(const char * fmt, } mdelay(PANIC_TIMER_STEP); } + } + if (panic_timeout != 0) { /* * This will not be a clean reboot, with everything * shutting down. But if there is a chance of _ Patches currently in -mm which might be from hughd@xxxxxxxxxxxx are origin.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html