Date: Wed, 24 May 2006 23:46:17 +0300 From: Giorgos Keramidas <keramida@ceid.upatras.gr> To: Kris Kennaway <kris@obsecurity.org> Cc: current@freebsd.org Subject: Re: md /tmp and async mounts Message-ID: <20060524204617.GA13701@gothmog.pc> In-Reply-To: <20060524203747.GA88742@xor.obsecurity.org> References: <20060522211223.GA3621@xor.obsecurity.org> <20060522231437.GC1446@odin.ac.hmc.edu> <20060523133037.GA2908@gothmog.pc> <20060523143013.GA11472@ci0.org> <20060523194106.GA46634@xor.obsecurity.org> <20060524203645.GB13500@gothmog.pc> <20060524203747.GA88742@xor.obsecurity.org>
next in thread | previous in thread | raw e-mail | index | archive | help
On 2006-05-24 16:37, Kris Kennaway <kris@obsecurity.org> wrote: > On Wed, May 24, 2006 at 11:36:45PM +0300, Giorgos Keramidas wrote: > > On 2006-05-23 15:41, Kris Kennaway <kris@obsecurity.org> wrote: > > > You are confusing mdconfig's -o async mode, used only for vnode > > > backing (not the case here anyway): > > > > > > [no]async > > > For vnode backed devices: avoid IO_SYNC for increased > > > performance but at the risk of deadlocking the entire > > > kernel. > > > > > > with mount's -o async mode, used at the filesystem layer on any > > > device. The latter does not have deadlocks. > > > > Hi Kris, > > > > so we can safely add async to `tmpmfs_flags' in /etc/defaults/rc.conf? > > I think so. Also whatever else uses mds (diskless booting, ...?) AFAIK, only /etc/rc.d/tmp and /etc/rc.d/var use the mount_md() function from `rc.subr'. I think `/etc/rc.initdiskless' includes a local version of mount_md() and uses that one. > > If that is so, do you want me to make the change, or do you want to do > > this? > > I don't have a good idea of what needs to be changed to do all of the > above, so if you're familiar with the code you might as well do it. I can certainly prepare a patch for /etc/rc.d/* files and their manpages. I'll post it for review then :)
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20060524204617.GA13701>