From mboxrd@z Thu Jan 1 00:00:00 1970 From: James Smart Subject: Re: [RFC] pv-scsi driver (scsiback/scsifront) Date: Wed, 16 May 2007 09:10:13 -0400 Message-ID: <464B02B5.5000903@emulex.com> References: <1AC79799C3B324t.horikoshi@jp.fujitsu.com> Reply-To: James.Smart@Emulex.Com Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-2022-JP Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1AC79799C3B324t.horikoshi@jp.fujitsu.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Tomonari Horikoshi Cc: xen-devel List-Id: xen-devel@lists.xenproject.org Tomonari Horikoshi wrote: > Hi all. > > We developped a pv-scsi driver that we refered Fujita-san's scsi-driver > and blkback. > (see, http://www.xensource.com/files/xensummit_4/Xen_Summit_8_Matsumoto.pdf) > > The pv-scsi driver's feature is as follow: > * Guest has dedicated SCSI-HBAs of Dom0. > * Guest can send scsi_cdb to the HBAs. > * Guest recognises the HBAs from hostno of xenstore. > > Currentlly, We are developping FC version based on this. > > * Future work: > * implement python code > * performance tunning > * attach, detach > * suspend, resume > > * We are wondering about: > * We used "scsihost" as xenstore nodename. Is it suitable? > * We consider about configfile format... > scsihost = ['fc,0', 'scsi,1', 'type,num'] > type = "fc" or "scsi" > num = scsi host number on Dom0 I would expect "fc" does not need to be specified, unless there is FC-isms exposed to the guest. > Do you have any comment? > * We have no idea how to implement suspend/resume feature. > ex. Physical HBA mapping for resumed guest. > Pending I/O. > The WWN within FC mode for resumed guest. The WWN is a whole different issue - and I'm going to want to make sure that whatever you do here is consistent with FC NPIV virtual ports instantiated in Dom 0. See: http://marc.info/?l=linux-scsi&m=117768770720886&w=2 > Influence of migration. > ... > > Could you suggest to us about this? > > > > Best regards, > Tomonari Horikoshi > > > > ------------------------------------------------------------------------ > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xensource.com > http://lists.xensource.com/xen-devel