Hi Andi, On Sat, Mar 20, 2010 at 5:29 PM, Andi Kleen <andi@xxxxxxxxxxxxxx> wrote: > > Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx> Thanks for this patch. I've done a few language fixes, and also attempted to refine some details. Could you review the below, which will be in 3.25? Thanks, Michael --- a/man2/prctl.2 +++ b/man2/prctl.2 @@ -37,6 +37,7 @@ .\" 2008-06-13 Erik Bosman, <ejbosman@xxxxxxxx> .\" Document PR_GET_TSC and PR_SET_TSC. .\" 2008-06-15 mtk, Document PR_SET_SECCOMP, PR_GET_SECCOMP +.\" 2009-10-03 Andi Kleen, document PR_MCE_KILL_* .\" .TH PRCTL 2 2010-05-13 "Linux" "Linux Programmer's Manual" .SH NAME @@ -324,6 +325,52 @@ on unaligned user access. for information on versions and architectures) Return unaligned access control bits, in the location pointed to by .IR "(int\ *) arg2" . +.TP +.BR PR_MCE_KILL " (since Linux 2.6.32)" +Set the machine check memory corruption kill policy for the current thread. +If +.I arg2 +is +.BR PR_MCE_KILL_CLEAR , +clear the thread memory corruption kill policy and use the system-wide default. +(The system-wide default is defined by +.IR /proc/sys/vm/memory_failure_early_kill ; +see +.BR proc (5).) +If +.I arg2 +is +.BR PR_MCE_KILL_SET , +use a thread-specific memory corruption kill policy. +In this case, +.I arg3 +defines whether the policy is +.I early kill +.RB ( PR_MCE_KILL_EARLY ), +.I late kill +.RB ( PR_MCE_KILL_LATE ), +or the system-wide default +.RB ( PR_MCE_KILL_DEFAULT ). +Early kill means that the task receives a +.B SIGBUS +signal as soon as hardware memory corruption is detected inside +its address space. +In late kill mode, the process is only killed when it accesses a corrupted page. +See +.I sigaction(2) +for more information on the +.BR SIGBUS +signal. +The policy is inherited by children. +The remaining unused +.BR prctl () +arguments must be zero for future compatibility. +.TP +.BR PR_MCE_KILL_GET " (since Linux 2.6.32)" +Return the current per-process machine check kill policy. +All unused +.BR prctl () +arguments must be zero. .SH "RETURN VALUE" On success, .BR PR_GET_DUMPABLE , @@ -331,6 +378,7 @@ On success, .BR PR_CAPBSET_READ , .BR PR_GET_TIMING , .BR PR_GET_SECUREBITS , +.BR PR_MCE_KILL_GET , and (if it returns) .BR PR_GET_SECCOMP return the nonnegative values described above. @@ -352,6 +400,16 @@ The value of is not recognized. .TP .B EINVAL +.I option +is +.BR PR_MCE_KILL +or +.BR PR_MCE_KILL_GET , +and unused +.BR prctl () +arguments were not specified as zero. +.TP +.B EINVAL .I arg2 is not valid value for this .IR option . -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
