On 6 Sep 2020, at 21:46, Alan Somers <asom...@freebsd.org> wrote: > > On Mon, Aug 24, 2020 at 3:01 AM Mateusz Guzik <m...@freebsd.org> wrote: > Author: mjg > Date: Mon Aug 24 09:00:57 2020 > New Revision: 364637 > URL: https://svnweb.freebsd.org/changeset/base/364637 > > Log: > cache: lockless reverse lookup > > This enables fully scalable operation for getcwd and significantly improves > realpath. > > For example: > PATH_CUSTOM=/usr/src ./getcwd_processes -t 104 > before: 1550851 > after: 380135380 > > Tested by: pho > > Modified: > head/sys/kern/vfs_cache.c > > Modified: head/sys/kern/vfs_cache.c > ============================================================================== > --- head/sys/kern/vfs_cache.c Mon Aug 24 09:00:07 2020 (r364636) > +++ head/sys/kern/vfs_cache.c Mon Aug 24 09:00:57 2020 (r364637) > @@ -477,6 +485,8 @@ STATNODE_COUNTER(shrinking_skipped, > static void cache_zap_locked(struct namecache *ncp); > static int vn_fullpath_hardlink(struct nameidata *ndp, char **retbuf, > char **freebuf, size_t *buflen); > +static int vn_fullpath_any_smr(struct vnode *vp, struct vnode *rdir, char > *buf, > + char **retbuf, size_t *buflen, bool slash_prefixed, size_t addend); > static int vn_fullpath_any(struct vnode *vp, struct vnode *rdir, char *buf, > char **retbuf, size_t *buflen); > static int vn_fullpath_dir(struct vnode *vp, struct vnode *rdir, char *buf, > @@ -2476,9 +2486,17 @@ vn_getcwd(char *buf, char **retbuf, size_t *buflen) > > What does the "smr" stand for?
Safe Memory Reclamation (see sys/sys/smr.h and sys/kern/subr_smr.c). Jess _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
