Hi, Boaz, > -----Original Message----- > From: Boaz Harrosh [mailto:bharrosh@xxxxxxxxxxx] > Sent: Friday, August 12, 2011 8:10 AM > To: Peng Tao > Cc: Trond Myklebust; Benny Halevy; linux-nfs@xxxxxxxxxxxxxxx; Peng, Tao > Subject: Re: [PATCH 1/5] pNFS: recoalesce when ld write pagelist fails > > On 08/11/2011 04:53 PM, Peng Tao wrote: > >> > >> You should see if what I say is possible for write. And then maybe some > >> thing will come up also for read. They do not necessarily need to be the > >> same. (I think) > > I agree that it is possible for write. We can re-dirty the pages and > > rely on next flush to write it out to MDS. This is mentioned by Trond > > before. However, the method won't work for read failures. I don't see > > how we can queue failed read pages and let someone else re-send it > > later. > > > > Lets leave the read patch as is for now. Lets try to do it only for > writes. > > It is OK to have write do one way and read do another way, I think. > > Maybe later we can find a better solution for reads as well. I tried to rewrite the write patch to handle failures inside mds_ops->rpc_release. However, I get a problem w.r.t. "redirty and rely on next flush". If the failed write is the *last flush*, we end up with relying no one and the dirty pages are simply dropped. Do you have any suggestions how to handle it? Thanks, Tao ��.n��������+%������w��{.n�����{��w��� jg��� �����ݢj����G���� ���j:+v���w�m������w�������h�����٥
