diff options
| -rw-r--r-- | usr/src/uts/common/os/kstat_fr.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/usr/src/uts/common/os/kstat_fr.c b/usr/src/uts/common/os/kstat_fr.c index a9f2e8eede..9b9634028c 100644 --- a/usr/src/uts/common/os/kstat_fr.c +++ b/usr/src/uts/common/os/kstat_fr.c @@ -1207,6 +1207,12 @@ kstat_install(kstat_t *ksp) /* * Now that the kstat is active, make it visible to the kstat driver. + * When copying out kstats the count is determined in + * header_kstat_update() and actually copied into kbuf in + * header_kstat_snapshot(). kstat_chain_lock is held across the two + * calls to ensure that this list doesn't change. Thus, we need to + * also take the lock to ensure that the we don't copy the new kstat + * in the 2nd pass and overrun the buf. */ mutex_enter(&kstat_chain_lock); ksp->ks_flags &= ~KSTAT_FLAG_INVALID; |