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Use a dedicated taskqueue with a thread that runs at a software-interrupt

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priority for the periodic polling of the machine check registers.
This commit is contained in:
jhb 2011-02-03 13:09:22 +00:00
parent 4d632ac7a7
commit 5cec5b65a5
1 changed files with 7 additions and 3 deletions
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10
sys/x86/x86/mca.c
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@ -105,6 +105,7 @@ SYSCTL_INT(_hw_mca, OID_AUTO, erratum383, CTLFLAG_RD, &workaround_erratum383, 0,
static STAILQ_HEAD(, mca_internal) mca_records;
static struct callout mca_timer;
static int mca_ticks = 3600; /* Check hourly by default. */
static struct taskqueue *mca_tq;
static struct task mca_task;
static struct mtx mca_lock;
@ -606,7 +607,7 @@ static void
mca_periodic_scan(void *arg)
{
taskqueue_enqueue(taskqueue_thread, &mca_task);
taskqueue_enqueue(mca_tq, &mca_task);
callout_reset(&mca_timer, mca_ticks * hz, mca_periodic_scan, NULL);
}
@ -620,7 +621,7 @@ sysctl_mca_scan(SYSCTL_HANDLER_ARGS)
if (error)
return (error);
if (i)
taskqueue_enqueue(taskqueue_thread, &mca_task);
taskqueue_enqueue(mca_tq, &mca_task);
return (0);
}
@ -631,6 +632,9 @@ mca_startup(void *dummy)
if (!mca_enabled || !(cpu_feature & CPUID_MCA))
return;
mca_tq = taskqueue_create("mca", M_WAITOK, taskqueue_thread_enqueue,
&mca_tq);
taskqueue_start_threads(&mca_tq, 1, PI_SWI(SWI_TQ), "mca taskq");
callout_reset(&mca_timer, mca_ticks * hz, mca_periodic_scan,
NULL);
}
@ -670,7 +674,7 @@ mca_setup(uint64_t mcg_cap)
mtx_init(&mca_lock, "mca", NULL, MTX_SPIN);
STAILQ_INIT(&mca_records);
TASK_INIT(&mca_task, 0x8000, mca_scan_cpus, NULL);
TASK_INIT(&mca_task, 0, mca_scan_cpus, NULL);
callout_init(&mca_timer, CALLOUT_MPSAFE);
SYSCTL_ADD_INT(NULL, SYSCTL_STATIC_CHILDREN(_hw_mca), OID_AUTO,
"count", CTLFLAG_RD, &mca_count, 0, "Record count");