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From: "Bernard Metzler" <BMT@zurich.ibm.com>
To: ira.weiny@intel.com
Cc: "Andrew Morton" <akpm@linux-foundation.org>,
	"Thomas Gleixner" <tglx@linutronix.de>,
	"Ingo Molnar" <mingo@redhat.com>,
	"Borislav Petkov" <bp@alien8.de>,
	"Andy Lutomirski" <luto@kernel.org>,
	"Peter Zijlstra" <peterz@infradead.org>,
	"Mike Marciniszyn" <mike.marciniszyn@intel.com>,
	"Dennis Dalessandro" <dennis.dalessandro@intel.com>,
	"Doug Ledford" <dledford@redhat.com>,
	"Jason Gunthorpe" <jgg@ziepe.ca>,
	"Faisal Latif" <faisal.latif@intel.com>,
	"Shiraz Saleem" <shiraz.saleem@intel.com>,
	x86@kernel.org, "Dave Hansen" <dave.hansen@linux.intel.com>,
	"Dan Williams" <dan.j.williams@intel.com>,
	"Fenghua Yu" <fenghua.yu@intel.com>,
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Subject: Re: [PATCH RFC PKS/PMEM 10/58] drivers/rdma: Utilize new kmap_thread()
Date: Sat, 10 Oct 2020 11:36:49 +0000
Message-ID: <OF849D92D8.F4735ECA-ON002585FD.003F5F27-002585FD.003FCBD6@notes.na.collabserv.com> (raw)
In-Reply-To: <20201009195033.3208459-11-ira.weiny@intel.com>

-----ira.weiny@intel.com wrote: -----

>To: "Andrew Morton" <akpm@linux-foundation.org>, "Thomas Gleixner"
><tglx@linutronix.de>, "Ingo Molnar" <mingo@redhat.com>, "Borislav
>Petkov" <bp@alien8.de>, "Andy Lutomirski" <luto@kernel.org>, "Peter
>Zijlstra" <peterz@infradead.org>
>From: ira.weiny@intel.com
>Date: 10/09/2020 09:52PM
>Cc: "Ira Weiny" <ira.weiny@intel.com>, "Mike Marciniszyn"
><mike.marciniszyn@intel.com>, "Dennis Dalessandro"
><dennis.dalessandro@intel.com>, "Doug Ledford" <dledford@redhat.com>,
>"Jason Gunthorpe" <jgg@ziepe.ca>, "Faisal Latif"
><faisal.latif@intel.com>, "Shiraz Saleem" <shiraz.saleem@intel.com>,
>"Bernard Metzler" <bmt@zurich.ibm.com>, x86@kernel.org, "Dave Hansen"
><dave.hansen@linux.intel.com>, "Dan Williams"
><dan.j.williams@intel.com>, "Fenghua Yu" <fenghua.yu@intel.com>,
>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_thread()
>
>From: Ira Weiny <ira.weiny@intel.com>
>
>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_thread()
>call.
>
>Cc: Mike Marciniszyn <mike.marciniszyn@intel.com>
>Cc: Dennis Dalessandro <dennis.dalessandro@intel.com>
>Cc: Doug Ledford <dledford@redhat.com>
>Cc: Jason Gunthorpe <jgg@ziepe.ca>
>Cc: Faisal Latif <faisal.latif@intel.com>
>Cc: Shiraz Saleem <shiraz.saleem@intel.com>
>Cc: Bernard Metzler <bmt@zurich.ibm.com>
>Signed-off-by: Ira Weiny <ira.weiny@intel.com>
>---
> drivers/infiniband/hw/hfi1/sdma.c      |  4 ++--
> drivers/infiniband/hw/i40iw/i40iw_cm.c | 10 +++++-----
> drivers/infiniband/sw/siw/siw_qp_tx.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_coal_sdma_tx_descs(struct hfi1_devdata
>*dd, struct sdma_txreq *tx,
> 		}
> 
> 		if (type == SDMA_MAP_PAGE) {
>-			kvaddr = kmap(page);
>+			kvaddr = kmap_thread(page);
> 			kvaddr += offset;
> 		} else if (WARN_ON(!kvaddr)) {
> 			__sdma_txclean(dd, tx);
>@@ -3140,7 +3140,7 @@ int ext_coal_sdma_tx_descs(struct hfi1_devdata
>*dd, struct sdma_txreq *tx,
> 		memcpy(tx->coalesce_buf + tx->coalesce_idx, kvaddr, len);
> 		tx->coalesce_idx += len;
> 		if (type == SDMA_MAP_PAGE)
>-			kunmap(page);
>+			kunmap_thread(page);
> 
> 		/* If there is more data, return */
> 		if (tx->tlen - tx->coalesce_idx)
>diff --git a/drivers/infiniband/hw/i40iw/i40iw_cm.c
>b/drivers/infiniband/hw/i40iw/i40iw_cm.c
>index a3b95805c154..122d7a5642a1 100644
>--- a/drivers/infiniband/hw/i40iw/i40iw_cm.c
>+++ b/drivers/infiniband/hw/i40iw/i40iw_cm.c
>@@ -3721,7 +3721,7 @@ int i40iw_accept(struct iw_cm_id *cm_id, struct
>iw_cm_conn_param *conn_param)
> 		ibmr->device = iwpd->ibpd.device;
> 		iwqp->lsmm_mr = ibmr;
> 		if (iwqp->page)
>-			iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
>+			iwqp->sc_qp.qp_uk.sq_base = kmap_thread(iwqp->page);
> 		dev->iw_priv_qp_ops->qp_send_lsmm(&iwqp->sc_qp,
> 							iwqp->ietf_mem.va,
> 							(accept.size + conn_param->private_data_len),
>@@ -3729,12 +3729,12 @@ int i40iw_accept(struct iw_cm_id *cm_id,
>struct iw_cm_conn_param *conn_param)
> 
> 	} else {
> 		if (iwqp->page)
>-			iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
>+			iwqp->sc_qp.qp_uk.sq_base = kmap_thread(iwqp->page);
> 		dev->iw_priv_qp_ops->qp_send_lsmm(&iwqp->sc_qp, NULL, 0, 0);
> 	}
> 
> 	if (iwqp->page)
>-		kunmap(iwqp->page);
>+		kunmap_thread(iwqp->page);
> 
> 	iwqp->cm_id = cm_id;
> 	cm_node->cm_id = cm_id;
>@@ -4102,10 +4102,10 @@ static void i40iw_cm_event_connected(struct
>i40iw_cm_event *event)
> 	i40iw_cm_init_tsa_conn(iwqp, cm_node);
> 	read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO);
> 	if (iwqp->page)
>-		iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
>+		iwqp->sc_qp.qp_uk.sq_base = kmap_thread(iwqp->page);
> 	dev->iw_priv_qp_ops->qp_send_rtt(&iwqp->sc_qp, read0);
> 	if (iwqp->page)
>-		kunmap(iwqp->page);
>+		kunmap_thread(iwqp->page);
> 
> 	memset(&attr, 0, sizeof(attr));
> 	attr.qp_state = IB_QPS_RTS;
>diff --git a/drivers/infiniband/sw/siw/siw_qp_tx.c
>b/drivers/infiniband/sw/siw/siw_qp_tx.c
>index d19d8325588b..4ed37c328d02 100644
>--- a/drivers/infiniband/sw/siw/siw_qp_tx.c
>+++ b/drivers/infiniband/sw/siw/siw_qp_tx.c
>@@ -76,7 +76,7 @@ static int siw_try_1seg(struct siw_iwarp_tx *c_tx,
>void *paddr)
> 			if (unlikely(!p))
> 				return -EFAULT;
> 
>-			buffer = kmap(p);
>+			buffer = kmap_thread(p);
> 
> 			if (likely(PAGE_SIZE - off >= bytes)) {
> 				memcpy(paddr, buffer + off, bytes);
>@@ -84,7 +84,7 @@ static int siw_try_1seg(struct siw_iwarp_tx *c_tx,
>void *paddr)
> 				unsigned long part = bytes - (PAGE_SIZE - off);
> 
> 				memcpy(paddr, buffer + off, part);
>-				kunmap(p);
>+				kunmap_thread(p);
> 
> 				if (!mem->is_pbl)
> 					p = siw_get_upage(mem->umem,
>@@ -96,10 +96,10 @@ static int siw_try_1seg(struct siw_iwarp_tx
>*c_tx, void *paddr)
> 				if (unlikely(!p))
> 					return -EFAULT;
> 
>-				buffer = kmap(p);
>+				buffer = kmap_thread(p);
> 				memcpy(paddr + part, buffer, bytes - part);
> 			}
>-			kunmap(p);
>+			kunmap_thread(p);
> 		}
> 	}
> 	return (int)bytes;
>@@ -505,7 +505,7 @@ static int siw_tx_hdt(struct siw_iwarp_tx *c_tx,
>struct socket *s)
> 				page_array[seg] = p;
> 
> 				if (!c_tx->use_sendpage) {
>-					iov[seg].iov_base = kmap(p) + fp_off;
>+					iov[seg].iov_base = kmap_thread(p) + fp_off;

This misses a corresponding kunmap_thread() in siw_unmap_pages()
(pls change line 403 in siw_qp_tx.c as well)

Thanks,
Bernard.

> 					iov[seg].iov_len = plen;
> 
> 					/* Remember for later kunmap() */
>@@ -518,9 +518,9 @@ static int siw_tx_hdt(struct siw_iwarp_tx *c_tx,
>struct socket *s)
> 							plen);
> 				} else if (do_crc) {
> 					crypto_shash_update(c_tx->mpa_crc_hd,
>-							    kmap(p) + fp_off,
>+							    kmap_thread(p) + fp_off,
> 							    plen);
>-					kunmap(p);
>+					kunmap_thread(p);
> 				}
> 			} else {
> 				u64 va = sge->laddr + sge_off;
>-- 
>2.28.0.rc0.12.gb6a658bd00c9
>
>


  parent reply index

Thread overview: 93+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-09 19:49 [PATCH RFC PKS/PMEM 00/58] PMEM: Introduce stray write protection for PMEM ira.weiny
2020-10-09 19:49 ` [PATCH RFC PKS/PMEM 01/58] x86/pks: Add a global pkrs option ira.weiny
2020-10-09 19:49 ` [PATCH RFC PKS/PMEM 02/58] x86/pks/test: Add testing for global option ira.weiny
2020-10-09 19:49 ` [PATCH RFC PKS/PMEM 03/58] memremap: Add zone device access protection ira.weiny
2020-10-09 19:49 ` [PATCH RFC PKS/PMEM 04/58] kmap: Add stray access protection for device pages ira.weiny
2020-10-09 19:49 ` [PATCH RFC PKS/PMEM 05/58] kmap: Introduce k[un]map_thread ira.weiny
2020-11-10  1:13   ` Thomas Gleixner
2020-11-10  4:59     ` Ira Weiny
2020-11-10  8:48       ` Thomas Gleixner
2020-10-09 19:49 ` [PATCH RFC PKS/PMEM 06/58] kmap: Introduce k[un]map_thread debugging ira.weiny
2020-10-09 19:49 ` [PATCH RFC PKS/PMEM 07/58] drivers/drbd: Utilize new kmap_thread() ira.weiny
2020-10-09 19:49 ` [PATCH RFC PKS/PMEM 08/58] drivers/firmware_loader: " ira.weiny
2020-10-09 19:49 ` [PATCH RFC PKS/PMEM 09/58] drivers/gpu: " ira.weiny
2020-10-09 22:03   ` Daniel Vetter
2020-10-10 23:01     ` Ira Weiny
2020-10-09 19:49 ` [PATCH RFC PKS/PMEM 10/58] drivers/rdma: " ira.weiny
2020-10-09 19:49 ` [PATCH RFC PKS/PMEM 11/58] drivers/net: " ira.weiny
2020-10-09 19:49 ` [PATCH RFC PKS/PMEM 12/58] fs/afs: " ira.weiny
2020-10-09 19:49 ` [PATCH RFC PKS/PMEM 13/58] fs/btrfs: " ira.weiny
2020-10-09 19:49 ` [PATCH RFC PKS/PMEM 14/58] fs/cifs: " ira.weiny
2020-10-09 19:49 ` [PATCH RFC PKS/PMEM 15/58] fs/ecryptfs: " ira.weiny
2020-10-09 19:49 ` [PATCH RFC PKS/PMEM 16/58] fs/gfs2: " ira.weiny
2020-10-09 19:49 ` [PATCH RFC PKS/PMEM 17/58] fs/nilfs2: " ira.weiny
2020-10-09 19:49 ` [PATCH RFC PKS/PMEM 18/58] fs/hfs: " ira.weiny
2020-10-09 19:49 ` [PATCH RFC PKS/PMEM 19/58] fs/hfsplus: " ira.weiny
2020-10-09 19:49 ` [PATCH RFC PKS/PMEM 20/58] fs/jffs2: " ira.weiny
2020-10-09 19:49 ` [PATCH RFC PKS/PMEM 21/58] fs/nfs: " ira.weiny
2020-10-09 19:49 ` [PATCH RFC PKS/PMEM 22/58] fs/f2fs: " ira.weiny
2020-10-09 21:34   ` Eric Biggers
2020-10-10  0:39     ` Matthew Wilcox
2020-10-10  1:30       ` Eric Biggers
2020-10-12  6:56         ` Ira Weiny
2020-10-12 16:19           ` Eric Biggers
2020-10-12 16:28             ` Dave Hansen
2020-10-12 16:44               ` Matthew Wilcox
2020-10-12 19:53                 ` Ira Weiny
2020-10-12 20:02                   ` Matthew Wilcox
2020-10-12 23:31                     ` Ira Weiny
2020-10-10  2:43     ` James Bottomley
2020-10-09 19:49 ` [PATCH RFC PKS/PMEM 23/58] fs/fuse: " ira.weiny
2020-10-09 19:49 ` [PATCH RFC PKS/PMEM 24/58] fs/freevxfs: " ira.weiny
2020-10-13 11:25   ` Christoph Hellwig
2020-10-13 20:52     ` Ira Weiny
2020-10-09 19:50 ` [PATCH RFC PKS/PMEM 25/58] fs/reiserfs: " ira.weiny
2020-10-09 19:50 ` [PATCH RFC PKS/PMEM 26/58] fs/zonefs: " ira.weiny
2020-10-12  2:30   ` Damien Le Moal
2020-10-09 19:50 ` [PATCH RFC PKS/PMEM 27/58] fs/ubifs: " ira.weiny
2020-10-09 19:50 ` [PATCH RFC PKS/PMEM 28/58] fs/cachefiles: " ira.weiny
2020-10-09 19:50 ` [PATCH RFC PKS/PMEM 29/58] fs/ntfs: " ira.weiny
2020-10-09 19:50 ` [PATCH RFC PKS/PMEM 30/58] fs/romfs: " ira.weiny
2020-10-09 19:50 ` [PATCH RFC PKS/PMEM 31/58] fs/vboxsf: " ira.weiny
2020-10-09 19:50 ` [PATCH RFC PKS/PMEM 32/58] fs/hostfs: " ira.weiny
2020-10-09 19:50 ` [PATCH RFC PKS/PMEM 33/58] fs/cramfs: " ira.weiny
2020-10-13 18:36   ` Nicolas Pitre
2020-10-13 18:44   ` Dan Williams
2020-10-13 19:36     ` Matthew Wilcox
2020-10-13 19:41       ` Dan Williams
2020-10-13 20:01       ` Al Viro
2020-10-13 20:50         ` Ira Weiny
2020-10-13 20:45       ` Ira Weiny
2020-10-09 19:50 ` [PATCH RFC PKS/PMEM 34/58] fs/erofs: " ira.weiny
2020-10-09 19:50 ` [PATCH RFC PKS/PMEM 35/58] fs: " ira.weiny
2020-10-09 19:50 ` [PATCH RFC PKS/PMEM 36/58] fs/ext2: Use ext2_put_page ira.weiny
2020-10-09 19:50 ` [PATCH RFC PKS/PMEM 37/58] fs/ext2: Utilize new kmap_thread() ira.weiny
2020-10-09 19:50 ` [PATCH RFC PKS/PMEM 38/58] fs/isofs: " ira.weiny
2020-10-09 19:50 ` [PATCH RFC PKS/PMEM 39/58] fs/jffs2: " ira.weiny
2020-10-09 19:50 ` [PATCH RFC PKS/PMEM 40/58] net: " ira.weiny
2020-10-09 19:50 ` [PATCH RFC PKS/PMEM 41/58] drivers/target: " ira.weiny
2020-10-09 19:50 ` [PATCH RFC PKS/PMEM 42/58] drivers/scsi: " ira.weiny
2020-10-09 19:50 ` [PATCH RFC PKS/PMEM 43/58] drivers/mmc: " ira.weiny
2020-10-09 19:50 ` [PATCH RFC PKS/PMEM 44/58] drivers/xen: " ira.weiny
2020-10-09 19:50 ` [PATCH RFC PKS/PMEM 45/58] drivers/firmware: " ira.weiny
2020-10-09 19:50 ` [PATCH RFC PKS/PMEM 46/58] drives/staging: " ira.weiny
2020-10-09 19:50 ` [PATCH RFC PKS/PMEM 47/58] drivers/mtd: " ira.weiny
2020-10-09 19:50 ` [PATCH RFC PKS/PMEM 48/58] drivers/md: " ira.weiny
2020-10-10  2:20   ` Coly Li
2020-10-12  5:28     ` Ira Weiny
2020-10-12  7:40       ` Coly Li
2020-10-09 19:50 ` [PATCH RFC PKS/PMEM 49/58] drivers/misc: " ira.weiny
2020-10-09 19:50 ` [PATCH RFC PKS/PMEM 50/58] drivers/android: " ira.weiny
2020-10-09 19:50 ` [PATCH RFC PKS/PMEM 51/58] kernel: " ira.weiny
2020-10-10  3:43   ` Eric W. Biederman
2020-10-09 19:50 ` [PATCH RFC PKS/PMEM 52/58] mm: " ira.weiny
2020-10-09 19:50 ` [PATCH RFC PKS/PMEM 53/58] lib: " ira.weiny
2020-10-09 19:50 ` [PATCH RFC PKS/PMEM 54/58] powerpc: " ira.weiny
2020-10-09 19:50 ` [PATCH RFC PKS/PMEM 55/58] samples: " ira.weiny
2020-10-09 19:50 ` [PATCH RFC PKS/PMEM 56/58] dax: Stray access protection for dax_direct_access() ira.weiny
2020-10-09 19:50 ` [PATCH RFC PKS/PMEM 57/58] nvdimm/pmem: Stray access protection for pmem->virt_addr ira.weiny
2020-10-10  2:53   ` John Hubbard
2020-10-12  5:52     ` Ira Weiny
2020-10-09 19:50 ` [PATCH RFC PKS/PMEM 58/58] [dax|pmem]: Enable stray access protection ira.weiny
2020-10-10 11:36 ` Bernard Metzler [this message]
2020-10-12  4:47   ` [PATCH RFC PKS/PMEM 10/58] drivers/rdma: Utilize new kmap_thread() Ira Weiny

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