Author: mjg
Date: Thu Nov 29 04:48:22 2018
New Revision: 341180
URL: https://svnweb.freebsd.org/changeset/base/341180
Log:
Annotate td_cowgen check as unlikely.
Sponsored by: The FreeBSD Foundation
Modified:
head/sys/kern/subr_syscall.c
Modified: head/sys/kern/subr_syscall.c
==============================================================================
--- head/sys/kern/subr_syscall.c Thu Nov 29 03:57:06 2018
(r341179)
+++ head/sys/kern/subr_syscall.c Thu Nov 29 04:48:22 2018
(r341180)
@@ -66,7 +66,7 @@ syscallenter(struct thread *td)
sa = &td->td_sa;
td->td_pticks = 0;
- if (td->td_cowgen != p->p_cowgen)
+ if (__predict_false(td->td_cowgen != p->p_cowgen))
thread_cow_update(td);
traced = (p->p_flag & P_TRACED) != 0;
if (traced || td->td_dbgflags & TDB_USERWR) {
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