linux-kernel - RE: [Patch v3 11/19] CIFS: SMBD: Define memory registration for I/O data

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Date:   Wed, 30 Aug 2017 02:12:32 +0000
From:   Long Li <longli@...rosoft.com>
To:     Pavel Shilovsky <piastryyy@...il.com>
CC:     Steve French <sfrench@...ba.org>,
        linux-cifs <linux-cifs@...r.kernel.org>,
        samba-technical <samba-technical@...ts.samba.org>,
        Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
        Christoph Hellwig <hch@...radead.org>,
        "Tom Talpey" <ttalpey@...rosoft.com>,
        Matthew Wilcox <mawilcox@...rosoft.com>
Subject: RE: [Patch v3 11/19] CIFS: SMBD: Define memory registration for I/O
 data



> -----Original Message-----
> From: Pavel Shilovsky [mailto:piastryyy@...il.com]
> Sent: Tuesday, August 29, 2017 5:49 PM
> To: Long Li <longli@...rosoft.com>
> Cc: Steve French <sfrench@...ba.org>; linux-cifs <linux-
> cifs@...r.kernel.org>; samba-technical <samba-technical@...ts.samba.org>;
> Kernel Mailing List <linux-kernel@...r.kernel.org>; linux-
> rdma@...r.kernel.org; Christoph Hellwig <hch@...radead.org>; Tom Talpey
> <ttalpey@...rosoft.com>; Matthew Wilcox <mawilcox@...rosoft.com>;
> Long Li <longli@...rosoft.com>
> Subject: Re: [Patch v3 11/19] CIFS: SMBD: Define memory registration for I/O
> data
> 
> 2017-08-29 12:29 GMT-07:00 Long Li <longli@...hange.microsoft.com>:
> > From: Long Li <longli@...rosoft.com>
> >
> > To prepare for RDMA read/write using memory registration, add memory
> > registartion pointers to upper layer data I/O context.
> >
> > Signed-off-by: Long Li <longli@...rosoft.com>
> > ---
> >  fs/cifs/cifsglob.h | 2 ++
> >  1 file changed, 2 insertions(+)
> >
> > diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index
> > dc5404d..dcd2b63 100644
> > --- a/fs/cifs/cifsglob.h
> > +++ b/fs/cifs/cifsglob.h
> > @@ -1166,6 +1166,7 @@ struct cifs_readdata {
> >                                 struct cifs_readdata *rdata,
> >                                 struct iov_iter *iter);
> >         struct kvec                     iov[2];
> > +       struct smbd_mr                  *mr;
> >         unsigned int                    pagesz;
> >         unsigned int                    tailsz;
> >         unsigned int                    credits;
> > @@ -1188,6 +1189,7 @@ struct cifs_writedata {
> >         pid_t                           pid;
> >         unsigned int                    bytes;
> >         int                             result;
> > +       struct smbd_mr                  *mr;
> >         unsigned int                    pagesz;
> >         unsigned int                    tailsz;
> >         unsigned int                    credits;
> > --
> > 2.7.4
> >
> > --
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> 
> The same thing: let's not add structure fields that the code doesn't do
> anything with.

Okay. I will fold the patch into relevant patches.

> 
> --
> Best regards,
> Pavel Shilovsky