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KDB: restart only CPUs stopped by KDB

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There is a case when not all CPUs went online. In that situation,
restart only APs which were operational before entering KDB.

Created by:            Wojciech Macek <wma@semihalf.com>
Obtained from:         Semihalf
Reviewed by:           nwhitehorn
Differential revision: https://reviews.freebsd.org/D13949
Sponsored by:          QCM Technologies
This commit is contained in:
Wojciech Macek 2018-01-18 07:38:54 +00:00
parent e70f868f17
commit 5b3e8b0725
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=328110
1 changed files with 3 additions and 1 deletions
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4
sys/kern/subr_kdb.c
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@ -673,6 +673,7 @@ kdb_trap(int type, int code, struct trapframe *tf)
#ifdef SMP
if (!SCHEDULER_STOPPED()) {
other_cpus = all_cpus;
CPU_NAND(&other_cpus, &stopped_cpus);
CPU_CLR(PCPU_GET(cpuid), &other_cpus);
stop_cpus_hard(other_cpus);
did_stop_cpus = 1;
@ -707,8 +708,9 @@ kdb_trap(int type, int code, struct trapframe *tf)
kdb_active--;
#ifdef SMP
CPU_AND(&other_cpus, &stopped_cpus);
if (did_stop_cpus)
restart_cpus(stopped_cpus);
restart_cpus(other_cpus);
#endif
intr_restore(intr);