From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Serge E. Hallyn" Subject: Re: [PATCH 03/45] Make the slow work pool configurable [ver #41] Date: Fri, 19 Dec 2008 12:33:13 -0600 Message-ID: <20081219183313.GB17113@us.ibm.com> References: <20081120144139.10667.75519.stgit@warthog.procyon.org.uk> <20081120144155.10667.38747.stgit@warthog.procyon.org.uk> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, nfsv4@linux-nfs.org, viro@ZenIV.linux.org.uk To: David Howells Return-path: Content-Disposition: inline In-Reply-To: <20081120144155.10667.38747.stgit@warthog.procyon.org.uk> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: nfsv4-bounces@linux-nfs.org Errors-To: nfsv4-bounces@linux-nfs.org List-Id: linux-fsdevel.vger.kernel.org Quoting David Howells (dhowells@redhat.com): > Make the slow work pool configurable through /proc/sys/kernel/slow-work. > > (*) /proc/sys/kernel/slow-work/min-threads > > The minimum number of threads that should be in the pool as long as it is > in use. This may be anywhere between 2 and max-threads. > > (*) /proc/sys/kernel/slow-work/max-threads > > The maximum number of threads that should in the pool. This may be > anywhere between min-threads and 255 or NR_CPUS * 2, whichever is greater. > > (*) /proc/sys/kernel/slow-work/vslow-percentage > > The percentage of active threads in the pool that may be used to execute > very slow work items. This may be between 1 and 99. The resultant number > is bounded to between 1 and one fewer than the number of active threads. > This ensures there is always at least one thread that can process very > slow work items, and always at least one thread that won't. > > Signed-off-by: David Howells Acked-by: Serge Hallyn