Date: Tue, 6 Sep 2016 23:58:18 +0200 From: Mateusz Guzik <mjguzik@gmail.com> To: Andriy Gapon <avg@FreeBSD.org> Cc: Mateusz Guzik <mjg@FreeBSD.org>, src-committers@FreeBSD.org, svn-src-all@FreeBSD.org, svn-src-head@FreeBSD.org, Konstantin Belousov <kib@FreeBSD.org> Subject: Re: svn commit: r305504 - head/sys/fs/nullfs Message-ID: <20160906215818.GD23680@dft-labs.eu> In-Reply-To: <20160906215149.GC23680@dft-labs.eu> References: <201609062122.u86LM3hf032522@repo.freebsd.org> <add2d275-797a-81e1-717f-ab2b62c3a946@FreeBSD.org> <20160906215149.GC23680@dft-labs.eu>
next in thread | previous in thread | raw e-mail | index | archive | help
On Tue, Sep 06, 2016 at 11:51:49PM +0200, Mateusz Guzik wrote: > On Wed, Sep 07, 2016 at 12:46:44AM +0300, Andriy Gapon wrote: > > On 07/09/2016 00:22, Mateusz Guzik wrote: > > > nullfs: stop special-casing directories in null_vptocnp > > > > > > The previous code was forcing an expensive walk in vop_stdvptocnp, > > > which was causing performance issues on highly contended zfs. > > > > In other words, the name cache was always bypassed for directories? > > > > Or whatever the target fs had in store for resolving names. > > This particular thing was causing a lot of idle time on my poudriere > tests due to lockmgr contention. > To be clear, this is not name -> vp translation, but the other way around (e.g. for getcwd). -- Mateusz Guzik <mjguzik gmail.com>
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20160906215818.GD23680>