1e2f0ceb2f
vnode usecount drops to 0 all the time (e.g. for directories during path lookup). When that happens the kernel would always lock the exclusive lock for the vnode in order to call vinactive(). This blocks other threads who want to use the vnode for looukp. vinactive is very rarely needed and can be tested for without the vnode lock held. This patch gives filesytems an opportunity to do it, sample total wait time for tmpfs over 500 minutes of poudriere -j 104: before: 557563641706 (lockmgr:tmpfs) after: 46309603301 (lockmgr:tmpfs) Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D21371 |
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| .. | ||
| union_subr.c | ||
| union_vfsops.c | ||
| union_vnops.c | ||
| union.h | ||