From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wu Fengguang Subject: Re: [PATCH v2] NFS: introduce writeback wait queue Date: Mon, 5 Oct 2009 15:39:59 +0800 Message-ID: <20091005073959.GA23398@localhost> References: <20091004030153.GA20327@localhost> <20091005071026.GA19262@localhost> <20091005073551.GA23102@localhost> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Chris Mason , Trond Myklebust , Andrew Morton , linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, LKML , linux-nfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: "jens.axboe-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org" Return-path: Content-Disposition: inline In-Reply-To: <20091005073551.GA23102@localhost> Sender: linux-nfs-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-fsdevel.vger.kernel.org On Mon, Oct 05, 2009 at 03:35:51PM +0800, Wu Fengguang wrote: > Trond, I see this trace on linux-next. There are no more dirty pages > when `cp' aborts after filling up the partition: > > cp: writing `/mnt/test/zero3': No space left on device > > I noticed that since then nr_writeback is decreased very slowly > (~100 pages per second). Looks like an interesting behavior. In the mean time, there are constant 7-8MB/s writes in the NFS server. The network flow is much smaller ~400K/s. How can I debug this issue? Thanks, Fengguang > nr_writeback nr_dirty nr_unstable > 41230 36284 8764 > 41230 37307 7755 > 40009 42812 3818 > 32619 42812 11198 > 32314 42812 11503 > 31894 42812 11862 > 31832 42812 11871 > 31770 42812 11871 > 31721 42812 11871 > 31653 42812 11871 > 40789 33754 11871 > 40713 33754 11871 > 40638 33754 11871 > 40566 33754 11871 > 43901 30313 11871 > 74164 0 11871 > 74062 0 11871 > 73978 0 11871 > 73904 0 11871 > 73858 0 11871 > 73798 0 11871 > 73688 0 11871 > 73580 0 11871 > 73477 0 11871 > > Thanks, > Fengguang -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html