From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Date: Wed, 25 Sep 2013 17:00:16 -0400 From: Tejun Heo To: Alexander Gordeev Cc: Bjorn Helgaas , Michael Ellerman , Benjamin Herrenschmidt , "linux-kernel@vger.kernel.org" , "x86@kernel.org" , "linux-pci@vger.kernel.org" , "linux-ide@vger.kernel.org" , Ingo Molnar , Joerg Roedel , Jan Beulich , linuxppc-dev@lists.ozlabs.org Subject: Re: [PATCH v2 2/6] PCI/MSI: Factor out pci_get_msi_cap() interface Message-ID: <20130925210016.GA8926@htj.dyndns.org> References: <20130909152044.GA24962@dhcp-26-207.brq.redhat.com> <20130916102210.GA14102@dhcp-26-207.brq.redhat.com> <20130917143022.GA7707@concordia> <20130918094759.GA2353@dhcp-26-207.brq.redhat.com> <20130918142231.GA21650@mtj.dyndns.org> <20130918165045.GB2353@dhcp-26-207.brq.redhat.com> <20130920082458.GA10507@dhcp-26-207.brq.redhat.com> <20130920122736.GD7630@mtj.dyndns.org> <20130925180220.GB26273@google.com> <20130925205804.GA21737@dhcp-26-207.brq.redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <20130925205804.GA21737@dhcp-26-207.brq.redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: Hello, On Wed, Sep 25, 2013 at 10:58:05PM +0200, Alexander Gordeev wrote: > Unfortunately, pSeries is a shows-topper here :( It seems we have to > introduce pci_get_msi{,x}_limit() interfaces to honour the quota > thing. I just hope the hardware set for pSeries is limited and we > won't need to use it for all drivers. Can you please go into a bit of detail on that? Why does it matter? Is it because you're worried you might cause performance regression by forcing prevoius partial multiple allocations to single interrupt operation? Thanks. -- tejun