Author: avg
Date: Thu Nov 17 15:14:54 2016
New Revision: 308758
URL: https://svnweb.freebsd.org/changeset/base/308758
Log:
MFC r308101: hwpmc: fix a race between amd_stop_pmc and amd_intr
Modified:
stable/11/sys/dev/hwpmc/hwpmc_amd.c
Directory Properties:
stable/11/ (props changed)
Modified: stable/11/sys/dev/hwpmc/hwpmc_amd.c
==============================================================================
--- stable/11/sys/dev/hwpmc/hwpmc_amd.c Thu Nov 17 15:13:20 2016
(r308757)
+++ stable/11/sys/dev/hwpmc/hwpmc_amd.c Thu Nov 17 15:14:54 2016
(r308758)
@@ -689,12 +689,13 @@ amd_intr(int cpu, struct trapframe *tf)
error = pmc_process_interrupt(cpu, PMC_HR, pm, tf,
TRAPF_USERMODE(tf));
if (error == 0)
- wrmsr(evsel, config | AMD_PMC_ENABLE);
+ wrmsr(evsel, config);
}
atomic_add_int(retval ? &pmc_stats.pm_intr_processed :
&pmc_stats.pm_intr_ignored, 1);
+ PMCDBG1(MDP,INT,2, "retval=%d", retval);
return (retval);
}
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