Date: Thu, 18 Jan 2018 07:38:54 +0000 (UTC) From: Wojciech Macek <wma@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r328110 - head/sys/kern Message-ID: <201801180738.w0I7cswv054484@repo.freebsd.org>
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Author: wma Date: Thu Jan 18 07:38:54 2018 New Revision: 328110 URL: https://svnweb.freebsd.org/changeset/base/328110 Log: KDB: restart only CPUs stopped by KDB 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 Modified: head/sys/kern/subr_kdb.c Modified: head/sys/kern/subr_kdb.c ============================================================================== --- head/sys/kern/subr_kdb.c Thu Jan 18 06:28:21 2018 (r328109) +++ head/sys/kern/subr_kdb.c Thu Jan 18 07:38:54 2018 (r328110) @@ -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);
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