Author: mjg
Date: Sat Nov 30 16:41:47 2019
New Revision: 355227
URL: https://svnweb.freebsd.org/changeset/base/355227
Log:
tmpfs: add fast path to tmpfs_access for common case lookup
VEXEC consists of vast majority of all calls and almost all targets have
at least 0111.
Modified:
head/sys/fs/tmpfs/tmpfs_vnops.c
Modified: head/sys/fs/tmpfs/tmpfs_vnops.c
==============================================================================
--- head/sys/fs/tmpfs/tmpfs_vnops.c Sat Nov 30 16:40:16 2019
(r355226)
+++ head/sys/fs/tmpfs/tmpfs_vnops.c Sat Nov 30 16:41:47 2019
(r355227)
@@ -331,6 +331,12 @@ tmpfs_access(struct vop_access_args *v)
node = VP_TO_TMPFS_NODE(vp);
+ /*
+ * Common case path lookup.
+ */
+ if (__predict_true(accmode == VEXEC && (node->tn_mode & 0111) == 0111))
+ return (0);
+
switch (vp->v_type) {
case VDIR:
/* FALLTHROUGH */
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