Author: mjg
Date: Sun Feb 16 03:16:28 2020
New Revision: 357990
URL: https://svnweb.freebsd.org/changeset/base/357990
Log:
vfs: check early for VCHR in vput_final to short-circuit in the common case
Otherwise the compiler inlines v_decr_devcount which keps getting jumped over
in the common case of not dealing with a device.
Modified:
head/sys/kern/vfs_subr.c
Modified: head/sys/kern/vfs_subr.c
==============================================================================
--- head/sys/kern/vfs_subr.c Sun Feb 16 03:14:55 2020 (r357989)
+++ head/sys/kern/vfs_subr.c Sun Feb 16 03:16:28 2020 (r357990)
@@ -3208,7 +3208,7 @@ vput_final(struct vnode *vp, enum vput_op func)
VNPASS(vp->v_holdcnt > 0, vp);
VI_LOCK(vp);
- if (func != VRELE)
+ if (__predict_false(vp->v_type == VCHR && func != VRELE))
v_decr_devcount(vp);
/*
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