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[131.111.193.104]) by smtp.gmail.com with ESMTPSA id 9sm4141836wmf.7.2020.09.06.14.11.17 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Sun, 06 Sep 2020 14:11:17 -0700 (PDT) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 13.4 \(3608.120.23.2.1\)) Subject: Re: svn commit: r364637 - head/sys/kern From: Jessica Clarke In-Reply-To: Date: Sun, 6 Sep 2020 22:11:15 +0100 Cc: Mateusz Guzik , src-committers , svn-src-all , svn-src-head Content-Transfer-Encoding: quoted-printable Message-Id: <98DF431F-0187-43B7-9A23-FD31928B9504@freebsd.org> References: <202008240900.07O90w9Y093073@repo.freebsd.org> To: Alan Somers X-Mailer: Apple Mail (2.3608.120.23.2.1) X-Rspamd-Queue-Id: 4Bl3xN1CDBz4V57 X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=pass (mx1.freebsd.org: domain of jrtc27@jrtc27.com designates 209.85.128.46 as permitted sender) smtp.mailfrom=jrtc27@jrtc27.com X-Spamd-Result: default: False [-2.62 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; R_SPF_ALLOW(-0.20)[+ip4:209.85.128.0/17:c]; MV_CASE(0.50)[]; RCPT_COUNT_FIVE(0.00)[5]; RCVD_COUNT_THREE(0.00)[3]; TO_DN_ALL(0.00)[]; NEURAL_HAM_SHORT(-1.04)[-1.042]; FORGED_SENDER(0.30)[jrtc27@freebsd.org,jrtc27@jrtc27.com]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:15169, ipnet:209.85.128.0/17, country:US]; MID_RHS_MATCH_FROM(0.00)[]; FROM_NEQ_ENVFROM(0.00)[jrtc27@freebsd.org,jrtc27@jrtc27.com]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.07)[-1.075]; FREEFALL_USER(0.00)[jrtc27]; FROM_HAS_DN(0.00)[]; NEURAL_HAM_LONG(-1.00)[-0.999]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[svn-src-head@freebsd.org]; DMARC_NA(0.00)[freebsd.org]; TO_MATCH_ENVRCPT_SOME(0.00)[]; RCVD_IN_DNSWL_NONE(0.00)[209.85.128.46:from]; RWL_MAILSPIKE_POSSIBLE(0.00)[209.85.128.46:from]; RCVD_TLS_ALL(0.00)[]; MAILMAN_DEST(0.00)[svn-src-head] X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 06 Sep 2020 21:11:21 -0000 On 6 Sep 2020, at 21:46, Alan Somers wrote: >=20 > On Mon, Aug 24, 2020 at 3:01 AM Mateusz Guzik wrote: > Author: mjg > Date: Mon Aug 24 09:00:57 2020 > New Revision: 364637 > URL: https://svnweb.freebsd.org/changeset/base/364637 >=20 > Log: > cache: lockless reverse lookup >=20 > This enables fully scalable operation for getcwd and significantly = improves > realpath. >=20 > For example: > PATH_CUSTOM=3D/usr/src ./getcwd_processes -t 104 > before: 1550851 > after: 380135380 >=20 > Tested by: pho >=20 > Modified: > head/sys/kern/vfs_cache.c >=20 > Modified: head/sys/kern/vfs_cache.c > = =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D > --- 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) >=20 > What does the "smr" stand for? Safe Memory Reclamation (see sys/sys/smr.h and sys/kern/subr_smr.c). Jess