linux-kselftest.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Ira Weiny <ira.weiny@intel.com>
To: John Hubbard <jhubbard@nvidia.com>
Cc: "Andrew Morton" <akpm@linux-foundation.org>,
	"Al Viro" <viro@zeniv.linux.org.uk>,
	"Alex Williamson" <alex.williamson@redhat.com>,
	"Benjamin Herrenschmidt" <benh@kernel.crashing.org>,
	"Björn Töpel" <bjorn.topel@intel.com>,
	"Christoph Hellwig" <hch@infradead.org>,
	"Dan Williams" <dan.j.williams@intel.com>,
	"Daniel Vetter" <daniel@ffwll.ch>,
	"Dave Chinner" <david@fromorbit.com>,
	"David Airlie" <airlied@linux.ie>,
	"David S . Miller" <davem@davemloft.net>,
	"Jan Kara" <jack@suse.cz>, "Jason Gunthorpe" <jgg@ziepe.ca>,
	"Jens Axboe" <axboe@kernel.dk>,
	"Jonathan Corbet" <corbet@lwn.net>,
	"Jérôme Glisse" <jglisse@redhat.com>,
	"Magnus Karlsson" <magnus.karlsson@intel.com>,
	"Mauro Carvalho Chehab" <mchehab@kernel.org>,
	"Michael Ellerman" <mpe@ellerman.id.au>,
	"Michal Hocko" <mhocko@suse.com>,
	"Mike Kravetz" <mike.kravetz@oracle.com>,
	"Paul Mackerras" <paulus@samba.org>,
	"Shuah Khan" <shuah@kernel.org>,
	"Vlastimil Babka" <vbabka@suse.cz>,
	bpf@vger.kernel.org, dri-devel@lists.freedesktop.org,
	kvm@vger.kernel.org, linux-block@vger.kernel.org,
	linux-doc@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	linux-kselftest@vger.kernel.org, linux-media@vger.kernel.org,
	linux-rdma@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
	netdev@vger.kernel.org, linux-mm@kvack.org,
	LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 07/19] infiniband: set FOLL_PIN, FOLL_LONGTERM via pin_longterm_pages*()
Date: Thu, 31 Oct 2019 16:25:48 -0700	[thread overview]
Message-ID: <20191031232546.GG14771@iweiny-DESK2.sc.intel.com> (raw)
In-Reply-To: <20191030224930.3990755-8-jhubbard@nvidia.com>

On Wed, Oct 30, 2019 at 03:49:18PM -0700, John Hubbard wrote:
> Convert infiniband to use the new wrapper calls, and stop
> explicitly setting FOLL_LONGTERM at the call sites.
> 
> The new pin_longterm_*() calls replace get_user_pages*()
> calls, and set both FOLL_LONGTERM and a new FOLL_PIN
> flag. The FOLL_PIN flag requires that the caller must
> return the pages via put_user_page*() calls, but
> infiniband was already doing that as part of an earlier
> commit.
> 

NOTE: I'm not 100% convinced that mixing the flags and new calls like this is
good.  I think we are going to need a lot more documentation on which flags are
"user" accessible vs not...

Reviewed-by: Ira Weiny <ira.weiny@intel.com>

> Signed-off-by: John Hubbard <jhubbard@nvidia.com>
> ---
>  drivers/infiniband/core/umem.c              |  5 ++---
>  drivers/infiniband/core/umem_odp.c          | 10 +++++-----
>  drivers/infiniband/hw/hfi1/user_pages.c     |  4 ++--
>  drivers/infiniband/hw/mthca/mthca_memfree.c |  3 +--
>  drivers/infiniband/hw/qib/qib_user_pages.c  |  8 ++++----
>  drivers/infiniband/hw/qib/qib_user_sdma.c   |  2 +-
>  drivers/infiniband/hw/usnic/usnic_uiom.c    |  9 ++++-----
>  drivers/infiniband/sw/siw/siw_mem.c         |  5 ++---
>  8 files changed, 21 insertions(+), 25 deletions(-)
> 
> diff --git a/drivers/infiniband/core/umem.c b/drivers/infiniband/core/umem.c
> index 24244a2f68cc..c5a78d3e674b 100644
> --- a/drivers/infiniband/core/umem.c
> +++ b/drivers/infiniband/core/umem.c
> @@ -272,11 +272,10 @@ struct ib_umem *ib_umem_get(struct ib_udata *udata, unsigned long addr,
>  
>  	while (npages) {
>  		down_read(&mm->mmap_sem);
> -		ret = get_user_pages(cur_base,
> +		ret = pin_longterm_pages(cur_base,
>  				     min_t(unsigned long, npages,
>  					   PAGE_SIZE / sizeof (struct page *)),
> -				     gup_flags | FOLL_LONGTERM,
> -				     page_list, NULL);
> +				     gup_flags, page_list, NULL);
>  		if (ret < 0) {
>  			up_read(&mm->mmap_sem);
>  			goto umem_release;
> diff --git a/drivers/infiniband/core/umem_odp.c b/drivers/infiniband/core/umem_odp.c
> index 163ff7ba92b7..a38b67b83db5 100644
> --- a/drivers/infiniband/core/umem_odp.c
> +++ b/drivers/infiniband/core/umem_odp.c
> @@ -534,7 +534,7 @@ static int ib_umem_odp_map_dma_single_page(
>  	} else if (umem_odp->page_list[page_index] == page) {
>  		umem_odp->dma_list[page_index] |= access_mask;
>  	} else {
> -		pr_err("error: got different pages in IB device and from get_user_pages. IB device page: %p, gup page: %p\n",
> +		pr_err("error: got different pages in IB device and from pin_longterm_pages. IB device page: %p, gup page: %p\n",
>  		       umem_odp->page_list[page_index], page);
>  		/* Better remove the mapping now, to prevent any further
>  		 * damage. */
> @@ -639,11 +639,11 @@ int ib_umem_odp_map_dma_pages(struct ib_umem_odp *umem_odp, u64 user_virt,
>  		/*
>  		 * Note: this might result in redundent page getting. We can
>  		 * avoid this by checking dma_list to be 0 before calling
> -		 * get_user_pages. However, this make the code much more
> -		 * complex (and doesn't gain us much performance in most use
> -		 * cases).
> +		 * pin_longterm_pages. However, this makes the code much
> +		 * more complex (and doesn't gain us much performance in most
> +		 * use cases).
>  		 */
> -		npages = get_user_pages_remote(owning_process, owning_mm,
> +		npages = pin_longterm_pages_remote(owning_process, owning_mm,
>  				user_virt, gup_num_pages,
>  				flags, local_page_list, NULL, NULL);
>  		up_read(&owning_mm->mmap_sem);
> diff --git a/drivers/infiniband/hw/hfi1/user_pages.c b/drivers/infiniband/hw/hfi1/user_pages.c
> index 469acb961fbd..9b55b0a73e29 100644
> --- a/drivers/infiniband/hw/hfi1/user_pages.c
> +++ b/drivers/infiniband/hw/hfi1/user_pages.c
> @@ -104,9 +104,9 @@ int hfi1_acquire_user_pages(struct mm_struct *mm, unsigned long vaddr, size_t np
>  			    bool writable, struct page **pages)
>  {
>  	int ret;
> -	unsigned int gup_flags = FOLL_LONGTERM | (writable ? FOLL_WRITE : 0);
> +	unsigned int gup_flags = (writable ? FOLL_WRITE : 0);
>  
> -	ret = get_user_pages_fast(vaddr, npages, gup_flags, pages);
> +	ret = pin_longterm_pages_fast(vaddr, npages, gup_flags, pages);
>  	if (ret < 0)
>  		return ret;
>  
> diff --git a/drivers/infiniband/hw/mthca/mthca_memfree.c b/drivers/infiniband/hw/mthca/mthca_memfree.c
> index edccfd6e178f..beec7e4b8a96 100644
> --- a/drivers/infiniband/hw/mthca/mthca_memfree.c
> +++ b/drivers/infiniband/hw/mthca/mthca_memfree.c
> @@ -472,8 +472,7 @@ int mthca_map_user_db(struct mthca_dev *dev, struct mthca_uar *uar,
>  		goto out;
>  	}
>  
> -	ret = get_user_pages_fast(uaddr & PAGE_MASK, 1,
> -				  FOLL_WRITE | FOLL_LONGTERM, pages);
> +	ret = pin_longterm_pages_fast(uaddr & PAGE_MASK, 1, FOLL_WRITE, pages);
>  	if (ret < 0)
>  		goto out;
>  
> diff --git a/drivers/infiniband/hw/qib/qib_user_pages.c b/drivers/infiniband/hw/qib/qib_user_pages.c
> index 6bf764e41891..684a14e14d9b 100644
> --- a/drivers/infiniband/hw/qib/qib_user_pages.c
> +++ b/drivers/infiniband/hw/qib/qib_user_pages.c
> @@ -108,10 +108,10 @@ int qib_get_user_pages(unsigned long start_page, size_t num_pages,
>  
>  	down_read(&current->mm->mmap_sem);
>  	for (got = 0; got < num_pages; got += ret) {
> -		ret = get_user_pages(start_page + got * PAGE_SIZE,
> -				     num_pages - got,
> -				     FOLL_LONGTERM | FOLL_WRITE | FOLL_FORCE,
> -				     p + got, NULL);
> +		ret = pin_longterm_pages(start_page + got * PAGE_SIZE,
> +					 num_pages - got,
> +					 FOLL_WRITE | FOLL_FORCE,
> +					 p + got, NULL);
>  		if (ret < 0) {
>  			up_read(&current->mm->mmap_sem);
>  			goto bail_release;
> diff --git a/drivers/infiniband/hw/qib/qib_user_sdma.c b/drivers/infiniband/hw/qib/qib_user_sdma.c
> index 05190edc2611..fd86a9d19370 100644
> --- a/drivers/infiniband/hw/qib/qib_user_sdma.c
> +++ b/drivers/infiniband/hw/qib/qib_user_sdma.c
> @@ -670,7 +670,7 @@ static int qib_user_sdma_pin_pages(const struct qib_devdata *dd,
>  		else
>  			j = npages;
>  
> -		ret = get_user_pages_fast(addr, j, FOLL_LONGTERM, pages);
> +		ret = pin_longterm_pages_fast(addr, j, 0, pages);
>  		if (ret != j) {
>  			i = 0;
>  			j = ret;
> diff --git a/drivers/infiniband/hw/usnic/usnic_uiom.c b/drivers/infiniband/hw/usnic/usnic_uiom.c
> index 62e6ffa9ad78..6b90ca1c3771 100644
> --- a/drivers/infiniband/hw/usnic/usnic_uiom.c
> +++ b/drivers/infiniband/hw/usnic/usnic_uiom.c
> @@ -141,11 +141,10 @@ static int usnic_uiom_get_pages(unsigned long addr, size_t size, int writable,
>  	ret = 0;
>  
>  	while (npages) {
> -		ret = get_user_pages(cur_base,
> -				     min_t(unsigned long, npages,
> -				     PAGE_SIZE / sizeof(struct page *)),
> -				     gup_flags | FOLL_LONGTERM,
> -				     page_list, NULL);
> +		ret = pin_longterm_pages(cur_base,
> +					 min_t(unsigned long, npages,
> +					     PAGE_SIZE / sizeof(struct page *)),
> +					 gup_flags, page_list, NULL);
>  
>  		if (ret < 0)
>  			goto out;
> diff --git a/drivers/infiniband/sw/siw/siw_mem.c b/drivers/infiniband/sw/siw/siw_mem.c
> index e99983f07663..20e663d7ada8 100644
> --- a/drivers/infiniband/sw/siw/siw_mem.c
> +++ b/drivers/infiniband/sw/siw/siw_mem.c
> @@ -426,9 +426,8 @@ struct siw_umem *siw_umem_get(u64 start, u64 len, bool writable)
>  		while (nents) {
>  			struct page **plist = &umem->page_chunk[i].plist[got];
>  
> -			rv = get_user_pages(first_page_va, nents,
> -					    foll_flags | FOLL_LONGTERM,
> -					    plist, NULL);
> +			rv = pin_longterm_pages(first_page_va, nents,
> +						foll_flags, plist, NULL);
>  			if (rv < 0)
>  				goto out_sem_up;
>  
> -- 
> 2.23.0
> 

  reply	other threads:[~2019-10-31 23:25 UTC|newest]

Thread overview: 47+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-30 22:49 [PATCH 00/19] mm/gup: track dma-pinned pages: FOLL_PIN, FOLL_LONGTERM John Hubbard
2019-10-30 22:49 ` [PATCH 01/19] mm/gup: pass flags arg to __gup_device_* functions John Hubbard
2019-10-31 18:18   ` Ira Weiny
2019-10-30 22:49 ` [PATCH 02/19] mm/gup: factor out duplicate code from four routines John Hubbard
2019-10-31 18:35   ` Ira Weiny
2019-10-31 18:43     ` John Hubbard
2019-10-31 21:09       ` Ira Weiny
2019-10-31 22:01         ` John Hubbard
2019-10-30 22:49 ` [PATCH 03/19] goldish_pipe: rename local pin_user_pages() routine John Hubbard
2019-10-31 18:36   ` Ira Weiny
2019-10-30 22:49 ` [PATCH 04/19] media/v4l2-core: set pages dirty upon releasing DMA buffers John Hubbard
2019-10-30 22:49 ` [PATCH 05/19] mm/gup: introduce pin_user_pages*() and FOLL_PIN John Hubbard
2019-10-31 23:15   ` Ira Weiny
2019-10-31 23:43     ` John Hubbard
2019-10-30 22:49 ` [PATCH 06/19] goldish_pipe: convert to pin_user_pages() and put_user_page() John Hubbard
2019-10-30 22:49 ` [PATCH 07/19] infiniband: set FOLL_PIN, FOLL_LONGTERM via pin_longterm_pages*() John Hubbard
2019-10-31 23:25   ` Ira Weiny [this message]
2019-10-31 23:49     ` John Hubbard
2019-10-30 22:49 ` [PATCH 08/19] mm/process_vm_access: set FOLL_PIN via pin_user_pages_remote() John Hubbard
2019-10-31 23:35   ` Ira Weiny
2019-10-31 23:46     ` John Hubbard
2019-10-30 22:49 ` [PATCH 09/19] drm/via: set FOLL_PIN via pin_user_pages_fast() John Hubbard
2019-10-31 23:36   ` Ira Weiny
2019-11-04 18:10     ` Daniel Vetter
2019-11-04 19:20       ` John Hubbard
2019-11-05  9:49         ` Daniel Vetter
2019-11-05 18:16           ` John Hubbard
2019-10-30 22:49 ` [PATCH 10/19] fs/io_uring: set FOLL_PIN via pin_user_pages() John Hubbard
2019-10-31 23:37   ` Ira Weiny
2019-11-01 14:49   ` Jens Axboe
2019-10-30 22:49 ` [PATCH 11/19] net/xdp: " John Hubbard
2019-10-31 23:37   ` Ira Weiny
2019-11-02 11:01   ` Björn Töpel
2019-10-30 22:49 ` [PATCH 12/19] mm/gup: track FOLL_PIN pages John Hubbard
2019-10-30 22:49 ` [PATCH 13/19] media/v4l2-core: pin_longterm_pages (FOLL_PIN) and put_user_page() conversion John Hubbard
2019-10-31 23:38   ` Ira Weiny
2019-10-30 22:49 ` [PATCH 14/19] vfio, mm: " John Hubbard
2019-10-30 23:05   ` John Hubbard
2019-10-30 22:49 ` [PATCH 15/19] powerpc: book3s64: convert to pin_longterm_pages() and put_user_page() John Hubbard
2019-10-30 22:49 ` [PATCH 16/19] mm/gup_benchmark: support pin_user_pages() and related calls John Hubbard
2019-10-30 22:49 ` [PATCH 17/19] selftests/vm: run_vmtests: invoke gup_benchmark with basic FOLL_PIN coverage John Hubbard
2019-10-30 22:49 ` [PATCH 18/19] mm/gup: remove support for gup(FOLL_LONGTERM) John Hubbard
2019-10-30 22:49 ` [PATCH 19/19] Documentation/vm: add pin_user_pages.rst John Hubbard
2019-10-31 23:49   ` Ira Weiny
2019-10-31 23:53     ` John Hubbard
2019-11-01  0:48     ` John Hubbard
2019-11-03 19:53   ` John Hubbard

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20191031232546.GG14771@iweiny-DESK2.sc.intel.com \
    --to=ira.weiny@intel.com \
    --cc=airlied@linux.ie \
    --cc=akpm@linux-foundation.org \
    --cc=alex.williamson@redhat.com \
    --cc=axboe@kernel.dk \
    --cc=benh@kernel.crashing.org \
    --cc=bjorn.topel@intel.com \
    --cc=bpf@vger.kernel.org \
    --cc=corbet@lwn.net \
    --cc=dan.j.williams@intel.com \
    --cc=daniel@ffwll.ch \
    --cc=davem@davemloft.net \
    --cc=david@fromorbit.com \
    --cc=dri-devel@lists.freedesktop.org \
    --cc=hch@infradead.org \
    --cc=jack@suse.cz \
    --cc=jgg@ziepe.ca \
    --cc=jglisse@redhat.com \
    --cc=jhubbard@nvidia.com \
    --cc=kvm@vger.kernel.org \
    --cc=linux-block@vger.kernel.org \
    --cc=linux-doc@vger.kernel.org \
    --cc=linux-fsdevel@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-kselftest@vger.kernel.org \
    --cc=linux-media@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=linux-rdma@vger.kernel.org \
    --cc=linuxppc-dev@lists.ozlabs.org \
    --cc=magnus.karlsson@intel.com \
    --cc=mchehab@kernel.org \
    --cc=mhocko@suse.com \
    --cc=mike.kravetz@oracle.com \
    --cc=mpe@ellerman.id.au \
    --cc=netdev@vger.kernel.org \
    --cc=paulus@samba.org \
    --cc=shuah@kernel.org \
    --cc=vbabka@suse.cz \
    --cc=viro@zeniv.linux.org.uk \
    --subject='Re: [PATCH 07/19] infiniband: set FOLL_PIN, FOLL_LONGTERM via pin_longterm_pages*()' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).