From: Peter Zijlstra Subject: Re: [RFC][Resend] Make NFS-Client readahead tunable Date: Thu, 18 Sep 2008 15:20:48 +0200 Message-ID: <1221744048.15314.30.camel@lappy.programming.kicks-ass.net> References: <124712.40022.qm@web32602.mail.mud.yahoo.com> Mime-Version: 1.0 Content-Type: text/plain Cc: Andrew Morton , Greg Banks , linux-nfs list , linux-kernel@vger.kernel.org To: Martin Knoblauch Return-path: In-Reply-To: <124712.40022.qm@web32602.mail.mud.yahoo.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: On Thu, 2008-09-18 at 01:38 -0700, Martin Knoblauch wrote: > I believe Peter wanted to add per bdi stuff for nfs some time ago. Not sure what came out of it. $ mount localhost:/ /mnt/tmp $ grep nfs /proc/$$/mountinfo 21 17 0:17 / /var/lib/nfs/rpc_pipefs rw - rpc_pipefs rpc_pipefs rw 31 13 0:20 / /proc/fs/nfsd rw - nfsd nfsd rw 37 17 0:22 / /mnt/tmp rw - nfs localhost:/ rw,vers=3,rsize=65536,wsize=65536,namlen=255,hard,nointr,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=127.0.0.1,mountvers=3,mountproto=tcp,addr=127.0.0.1 $ ls -la /sys/class/bdi/0\:22/ total 0 drwxr-xr-x 3 root root 0 2008-09-18 15:16 . drwxr-xr-x 21 root root 0 2008-09-18 15:16 .. -rw-r--r-- 1 root root 4096 2008-09-18 15:19 max_ratio -rw-r--r-- 1 root root 4096 2008-09-18 15:19 min_ratio drwxr-xr-x 2 root root 0 2008-09-18 15:19 power -rw-r--r-- 1 root root 4096 2008-09-18 15:19 read_ahead_kb lrwxrwxrwx 1 root root 0 2008-09-18 15:19 subsystem -> ../../bdi -rw-r--r-- 1 root root 4096 2008-09-18 15:19 uevent $ cat /sys/class/bdi/0\:22/read_ahead_kb 960