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<20201009195033.3208459-11-ira.weiny@intel.com> Subject: Re: [PATCH RFC PKS/PMEM 10/58] drivers/rdma: Utilize new kmap_thread() From: "Bernard Metzler" To: ira.weiny@intel.com Date: Sat, 10 Oct 2020 11:36:49 +0000 MIME-Version: 1.0 Sensitivity: Importance: Normal X-Priority: 3 (Normal) References: <20201009195033.3208459-11-ira.weiny@intel.com>, <20201009195033.3208459-1-ira.weiny@intel.com> X-Mailer: IBM iNotes ($HaikuForm 1054.1) | IBM Domino Build SCN1812108_20180501T0841_FP65 April 15, 2020 at 09:48 X-LLNOutbound: False X-Disclaimed: 59823 X-TNEFEvaluated: 1 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 x-cbid: 20101011-2475-0000-0000-0000044A0339 X-IBM-SpamModules-Scores: BY=0.233045; FL=0; FP=0; FZ=0; HX=0; KW=0; PH=0; SC=0.421684; ST=0; TS=0; UL=0; ISC=; MB=0.000000 X-IBM-SpamModules-Versions: BY=3.00013982; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000295; SDB=6.01447073; UDB=6.00777937; IPR=6.01229775; MB=3.00034472; 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samba-technical@lists.samba.org, Thomas Gleixner , devel@driverdev.osuosl.org, linux-cifs@vger.kernel.org, linux-nilfs@vger.kernel.org, linux-scsi@vger.kernel.org, linux-nvdimm@lists.01.org, linux-rdma@vger.kernel.org, x86@kernel.org, ceph-devel@vger.kernel.org, io-uring@vger.kernel.org, cluster-devel@redhat.com, Jason Gunthorpe , Doug Ledford , Ingo Molnar , intel-wired-lan@lists.osuosl.org, xen-devel@lists.xenproject.org, linux-ext4@vger.kernel.org, Fenghua Yu , linux-afs@lists.infradead.org, Faisal Latif , linux-um@lists.infradead.org, intel-gfx@lists.freedesktop.org, ecryptfs@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-nfs@vger.kernel.org, reiserfs-devel@vger.kernel.org, linux-block@vger.kernel.org, linux-bcache@vger.kernel.org, Borislav Petkov , Andy Lutomirski , drbd-dev@tron.linbit.com, amd-gfx@lists.freed.esktop.org, Dan Williams , Shiraz Saleem , bpf@vger.kernel.org, linux-cachefs@redhat.com, Mike Marciniszyn , linux-ntfs-dev@lists.sourceforge.net, netdev@vger.kernel.org, Dennis Dalessandro , kexec@lists.infradead.org, linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, Andrew Morton , linuxppc-dev@lists.ozlabs.org, linux-btrfs@vger.kernel.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" -----ira.weiny@intel.com wrote: ----- >To: "Andrew Morton" , "Thomas Gleixner" >, "Ingo Molnar" , "Borislav >Petkov" , "Andy Lutomirski" , "Peter >Zijlstra" >From: ira.weiny@intel.com >Date: 10/09/2020 09:52PM >Cc: "Ira Weiny" , "Mike Marciniszyn" >, "Dennis Dalessandro" >, "Doug Ledford" , >"Jason Gunthorpe" , "Faisal Latif" >, "Shiraz Saleem" , >"Bernard Metzler" , x86@kernel.org, "Dave Hansen" >, "Dan Williams" >, "Fenghua Yu" , >linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, >linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org, >linux-mm@kvack.org, linux-kselftest@vger.kernel.org, >linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, >netdev@vger.kernel.org, bpf@vger.kernel.org, >kexec@lists.infradead.org, linux-bcache@vger.kernel.org, >linux-mtd@lists.infradead.org, devel@driverdev.osuosl.org, >linux-efi@vger.kernel.org, linux-mmc@vger.kernel.org, >linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, >linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, >linux-ext4@vger.kernel.org, linux-aio@kvack.org, >io-uring@vger.kernel.org, linux-erofs@lists.ozlabs.org, >linux-um@lists.infradead.org, linux-ntfs-dev@lists.sourceforge.net, >reiserfs-devel@vger.kernel.org, >linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, >cluster-devel@redhat.com, ecryptfs@vger.kernel.org, >linux-cifs@vger.kernel.org, linux-btrfs@vger.kernel.org, >linux-afs@lists.infradead.org, linux-rdma@vger.kernel.org, >amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, >intel-gfx@lists.freedesktop.org, drbd-dev@tron.linbit.com, >linux-block@vger.kernel.org, xen-devel@lists.xenproject.org, >linux-cachefs@redhat.com, samba-technical@lists.samba.org, >intel-wired-lan@lists.osuosl.org >Subject: [EXTERNAL] [PATCH RFC PKS/PMEM 10/58] drivers/rdma: Utilize >new kmap=5Fthread() > >From: Ira Weiny > >The kmap() calls in these drivers are localized to a single thread. >To >avoid the over head of global PKRS updates use the new kmap=5Fthread() >call. > >Cc: Mike Marciniszyn >Cc: Dennis Dalessandro >Cc: Doug Ledford >Cc: Jason Gunthorpe >Cc: Faisal Latif >Cc: Shiraz Saleem >Cc: Bernard Metzler >Signed-off-by: Ira Weiny >--- > drivers/infiniband/hw/hfi1/sdma.c | 4 ++-- > drivers/infiniband/hw/i40iw/i40iw=5Fcm.c | 10 +++++----- > drivers/infiniband/sw/siw/siw=5Fqp=5Ftx.c | 14 +++++++------- > 3 files changed, 14 insertions(+), 14 deletions(-) > >diff --git a/drivers/infiniband/hw/hfi1/sdma.c >b/drivers/infiniband/hw/hfi1/sdma.c >index 04575c9afd61..09d206e3229a 100644 >--- a/drivers/infiniband/hw/hfi1/sdma.c >+++ b/drivers/infiniband/hw/hfi1/sdma.c >@@ -3130,7 +3130,7 @@ int ext=5Fcoal=5Fsdma=5Ftx=5Fdescs(struct hfi1=5Fdev= data >*dd, struct sdma=5Ftxreq *tx, > } >=20 > if (type =3D=3D SDMA=5FMAP=5FPAGE) { >- kvaddr =3D kmap(page); >+ kvaddr =3D kmap=5Fthread(page); > kvaddr +=3D offset; > } else if (WARN=5FON(!kvaddr)) { > =5F=5Fsdma=5Ftxclean(dd, tx); >@@ -3140,7 +3140,7 @@ int ext=5Fcoal=5Fsdma=5Ftx=5Fdescs(struct hfi1=5Fdev= data >*dd, struct sdma=5Ftxreq *tx, > memcpy(tx->coalesce=5Fbuf + tx->coalesce=5Fidx, kvaddr, len); > tx->coalesce=5Fidx +=3D len; > if (type =3D=3D SDMA=5FMAP=5FPAGE) >- kunmap(page); >+ kunmap=5Fthread(page); >=20 > /* If there is more data, return */ > if (tx->tlen - tx->coalesce=5Fidx) >diff --git a/drivers/infiniband/hw/i40iw/i40iw=5Fcm.c >b/drivers/infiniband/hw/i40iw/i40iw=5Fcm.c >index a3b95805c154..122d7a5642a1 100644 >--- a/drivers/infiniband/hw/i40iw/i40iw=5Fcm.c >+++ b/drivers/infiniband/hw/i40iw/i40iw=5Fcm.c >@@ -3721,7 +3721,7 @@ int i40iw=5Faccept(struct iw=5Fcm=5Fid *cm=5Fid, str= uct >iw=5Fcm=5Fconn=5Fparam *conn=5Fparam) > ibmr->device =3D iwpd->ibpd.device; > iwqp->lsmm=5Fmr =3D ibmr; > if (iwqp->page) >- iwqp->sc=5Fqp.qp=5Fuk.sq=5Fbase =3D kmap(iwqp->page); >+ iwqp->sc=5Fqp.qp=5Fuk.sq=5Fbase =3D kmap=5Fthread(iwqp->page); > dev->iw=5Fpriv=5Fqp=5Fops->qp=5Fsend=5Flsmm(&iwqp->sc=5Fqp, > iwqp->ietf=5Fmem.va, > (accept.size + conn=5Fparam->private=5Fdata=5Flen), >@@ -3729,12 +3729,12 @@ int i40iw=5Faccept(struct iw=5Fcm=5Fid *cm=5Fid, >struct iw=5Fcm=5Fconn=5Fparam *conn=5Fparam) >=20 > } else { > if (iwqp->page) >- iwqp->sc=5Fqp.qp=5Fuk.sq=5Fbase =3D kmap(iwqp->page); >+ iwqp->sc=5Fqp.qp=5Fuk.sq=5Fbase =3D kmap=5Fthread(iwqp->page); > dev->iw=5Fpriv=5Fqp=5Fops->qp=5Fsend=5Flsmm(&iwqp->sc=5Fqp, NULL, 0, 0); > } >=20 > if (iwqp->page) >- kunmap(iwqp->page); >+ kunmap=5Fthread(iwqp->page); >=20 > iwqp->cm=5Fid =3D cm=5Fid; > cm=5Fnode->cm=5Fid =3D cm=5Fid; >@@ -4102,10 +4102,10 @@ static void i40iw=5Fcm=5Fevent=5Fconnected(struct >i40iw=5Fcm=5Fevent *event) > i40iw=5Fcm=5Finit=5Ftsa=5Fconn(iwqp, cm=5Fnode); > read0 =3D (cm=5Fnode->send=5Frdma0=5Fop =3D=3D SEND=5FRDMA=5FREAD=5FZERO= ); > if (iwqp->page) >- iwqp->sc=5Fqp.qp=5Fuk.sq=5Fbase =3D kmap(iwqp->page); >+ iwqp->sc=5Fqp.qp=5Fuk.sq=5Fbase =3D kmap=5Fthread(iwqp->page); > dev->iw=5Fpriv=5Fqp=5Fops->qp=5Fsend=5Frtt(&iwqp->sc=5Fqp, read0); > if (iwqp->page) >- kunmap(iwqp->page); >+ kunmap=5Fthread(iwqp->page); >=20 > memset(&attr, 0, sizeof(attr)); > attr.qp=5Fstate =3D IB=5FQPS=5FRTS; >diff --git a/drivers/infiniband/sw/siw/siw=5Fqp=5Ftx.c >b/drivers/infiniband/sw/siw/siw=5Fqp=5Ftx.c >index d19d8325588b..4ed37c328d02 100644 >--- a/drivers/infiniband/sw/siw/siw=5Fqp=5Ftx.c >+++ b/drivers/infiniband/sw/siw/siw=5Fqp=5Ftx.c >@@ -76,7 +76,7 @@ static int siw=5Ftry=5F1seg(struct siw=5Fiwarp=5Ftx *c= =5Ftx, >void *paddr) > if (unlikely(!p)) > return -EFAULT; >=20 >- buffer =3D kmap(p); >+ buffer =3D kmap=5Fthread(p); >=20 > if (likely(PAGE=5FSIZE - off >=3D bytes)) { > memcpy(paddr, buffer + off, bytes); >@@ -84,7 +84,7 @@ static int siw=5Ftry=5F1seg(struct siw=5Fiwarp=5Ftx *c= =5Ftx, >void *paddr) > unsigned long part =3D bytes - (PAGE=5FSIZE - off); >=20 > memcpy(paddr, buffer + off, part); >- kunmap(p); >+ kunmap=5Fthread(p); >=20 > if (!mem->is=5Fpbl) > p =3D siw=5Fget=5Fupage(mem->umem, >@@ -96,10 +96,10 @@ static int siw=5Ftry=5F1seg(struct siw=5Fiwarp=5Ftx >*c=5Ftx, void *paddr) > if (unlikely(!p)) > return -EFAULT; >=20 >- buffer =3D kmap(p); >+ buffer =3D kmap=5Fthread(p); > memcpy(paddr + part, buffer, bytes - part); > } >- kunmap(p); >+ kunmap=5Fthread(p); > } > } > return (int)bytes; >@@ -505,7 +505,7 @@ static int siw=5Ftx=5Fhdt(struct siw=5Fiwarp=5Ftx *c= =5Ftx, >struct socket *s) > page=5Farray[seg] =3D p; >=20 > if (!c=5Ftx->use=5Fsendpage) { >- iov[seg].iov=5Fbase =3D kmap(p) + fp=5Foff; >+ iov[seg].iov=5Fbase =3D kmap=5Fthread(p) + fp=5Foff; This misses a corresponding kunmap=5Fthread() in siw=5Funmap=5Fpages() (pls change line 403 in siw=5Fqp=5Ftx.c as well) Thanks, Bernard. > iov[seg].iov=5Flen =3D plen; >=20 > /* Remember for later kunmap() */ >@@ -518,9 +518,9 @@ static int siw=5Ftx=5Fhdt(struct siw=5Fiwarp=5Ftx *c= =5Ftx, >struct socket *s) > plen); > } else if (do=5Fcrc) { > crypto=5Fshash=5Fupdate(c=5Ftx->mpa=5Fcrc=5Fhd, >- kmap(p) + fp=5Foff, >+ kmap=5Fthread(p) + fp=5Foff, > plen); >- kunmap(p); >+ kunmap=5Fthread(p); > } > } else { > u64 va =3D sge->laddr + sge=5Foff; >--=20 >2.28.0.rc0.12.gb6a658bd00c9 > >