Add -p switch to "zpool get"

[zfs.git] / module / zfs / fm.c

diff --git a/module/zfs/fm.c b/module/zfs/fm.c
index e4ecfea..c004032 100644 (file)
--- a/module/zfs/fm.c
+++ b/module/zfs/fm.c
@@ -418,7 +418,7 @@ zfs_zevent_alloc(void)
 {
        zevent_t *ev;
 
-       ev = kmem_zalloc(sizeof(zevent_t), KM_SLEEP);
+       ev = kmem_zalloc(sizeof(zevent_t), KM_PUSHPAGE);
        if (ev == NULL)
                return NULL;
 
@@ -481,14 +481,13 @@ zfs_zevent_drain_all(int *count)
 static void
 zfs_zevent_insert(zevent_t *ev)
 {
-       mutex_enter(&zevent_lock);
+       ASSERT(MUTEX_HELD(&zevent_lock));
        list_insert_head(&zevent_list, ev);
+
        if (zevent_len_cur >= zfs_zevent_len_max)
                zfs_zevent_drain(list_tail(&zevent_list));
        else
                zevent_len_cur++;
-
-       mutex_exit(&zevent_lock);
 }
 
 /*
@@ -528,8 +527,11 @@ zfs_zevent_post(nvlist_t *nvl, nvlist_t *detector, zevent_cb_t *cb)
         ev->ev_nvl = nvl;
        ev->ev_detector = detector;
        ev->ev_cb = cb;
+
+       mutex_enter(&zevent_lock);
        zfs_zevent_insert(ev);
        cv_broadcast(&zevent_cv);
+       mutex_exit(&zevent_lock);
 }
 
 static int
@@ -672,7 +674,7 @@ zfs_zevent_destroy(zfs_zevent_t *ze)
 static void *
 i_fm_alloc(nv_alloc_t *nva, size_t size)
 {
-       return (kmem_zalloc(size, KM_SLEEP));
+       return (kmem_zalloc(size, KM_PUSHPAGE));
 }
 
 /* ARGSUSED */
@@ -740,7 +742,7 @@ fm_nvlist_create(nv_alloc_t *nva)
        nv_alloc_t *nvhdl;
 
        if (nva == NULL) {
-               nvhdl = kmem_zalloc(sizeof (nv_alloc_t), KM_SLEEP);
+               nvhdl = kmem_zalloc(sizeof (nv_alloc_t), KM_PUSHPAGE);
 
                if (nv_alloc_init(nvhdl, &fm_mem_alloc_ops, NULL, 0) != 0) {
                        kmem_free(nvhdl, sizeof (nv_alloc_t));
@@ -1413,7 +1415,13 @@ fm_ena_generate_cpu(uint64_t timestamp, processorid_t cpuid, uchar_t format)
 uint64_t
 fm_ena_generate(uint64_t timestamp, uchar_t format)
 {
-       return (fm_ena_generate_cpu(timestamp, getcpuid(), format));
+       uint64_t ena;
+
+       kpreempt_disable();
+       ena = fm_ena_generate_cpu(timestamp, getcpuid(), format);
+       kpreempt_enable();
+
+       return (ena);
 }
 
 uint64_t
@@ -1514,9 +1522,10 @@ fm_fini(void)
        int count;
 
        zfs_zevent_drain_all(&count);
-       cv_broadcast(&zevent_cv);
 
        mutex_enter(&zevent_lock);
+       cv_broadcast(&zevent_cv);
+
        zevent_flags |= ZEVENT_SHUTDOWN;
        while (zevent_waiters > 0) {
                mutex_exit(&zevent_lock);