From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jens Axboe Subject: Re: [PATCH resend] bsg: Add support for submitting requests at tail of queue Date: Tue, 24 Mar 2009 13:14:38 +0100 Message-ID: <20090324121438.GQ27476@kernel.dk> References: <49C20CCD.5070607@panasas.com> <49C89CBC.7050306@panasas.com> <20090324210440Z.fujita.tomonori@lab.ntt.co.jp> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from brick.kernel.dk ([93.163.65.50]:42946 "EHLO kernel.dk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754642AbZCXMOk (ORCPT ); Tue, 24 Mar 2009 08:14:40 -0400 Content-Disposition: inline In-Reply-To: <20090324210440Z.fujita.tomonori@lab.ntt.co.jp> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: FUJITA Tomonori Cc: bharrosh@panasas.com, linux-scsi@vger.kernel.org, osd-dev@open-osd.org, dgilbert@interlog.com On Tue, Mar 24 2009, FUJITA Tomonori wrote: > On Tue, 24 Mar 2009 10:41:32 +0200 > Boaz Harrosh wrote: > > > Boaz Harrosh wrote: > > > Hi Tomo Jens > > > > > > Tomo you never ack-by on this patch. I absolutely needs this for the > > > user-mode API of osd-initiator. Which is needed with up-coming exofs > > > utilities. > > > > > > What do you want to do? > > > > > > Thanks > > > > > > > Hi Jens. > > > > I absolutely need this patch for 2.6.30 merge window. It is totally > > un-dangerous since defaults are left unchanged. > > The question is we really need this feature or not. Though I guess > that we need to address this starvation issue. I'd argue that tail insertion should be the most used way to queue commands, head insertion should only be for the cases where you want immediate access (like error handling). -- Jens Axboe