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dtrace: make 'ring' and 'fill' policies imply 'noswitch' flag

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This should disable allocation of the second per-CPU principal buffer
which is never used.  This will also enable additional asserts
for buffers that are never switched.

(cherry picked from commit e92491d95ff3500e140eafa614e88ca84ffb0d26)
This commit is contained in:
Andriy Gapon 2021-12-24 11:38:38 +02:00
parent a9bab712eb
commit fb9c50f983
1 changed files with 2 additions and 3 deletions
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5
sys/cddl/contrib/opensolaris/uts/common/dtrace/dtrace.c
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@ -12058,7 +12058,6 @@ dtrace_buffer_switch(dtrace_buffer_t *buf)
hrtime_t now;
ASSERT(!(buf->dtb_flags & DTRACEBUF_NOSWITCH));
ASSERT(!(buf->dtb_flags & DTRACEBUF_RING));
cookie = dtrace_interrupt_disable();
now = dtrace_gethrtime();
@ -14866,10 +14865,10 @@ dtrace_state_buffer(dtrace_state_t *state, dtrace_buffer_t *buf, int which)
if (which == DTRACEOPT_BUFSIZE) {
if (opt[DTRACEOPT_BUFPOLICY] == DTRACEOPT_BUFPOLICY_RING)
flags |= DTRACEBUF_RING;
flags |= DTRACEBUF_RING | DTRACEBUF_NOSWITCH;
if (opt[DTRACEOPT_BUFPOLICY] == DTRACEOPT_BUFPOLICY_FILL)
flags |= DTRACEBUF_FILL;
flags |= DTRACEBUF_FILL | DTRACEBUF_NOSWITCH;
if (state != dtrace_anon.dta_state ||
state->dts_activity != DTRACE_ACTIVITY_ACTIVE)