linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Ankur Arora <ankur.a.arora@oracle.com>
To: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org
Cc: mingo@kernel.org, bp@alien8.de, luto@kernel.org,
	akpm@linux-foundation.org, mike.kravetz@oracle.com,
	jon.grimm@amd.com, kvm@vger.kernel.org, konrad.wilk@oracle.com,
	boris.ostrovsky@oracle.com,
	Ankur Arora <ankur.a.arora@oracle.com>,
	alex.williamson@redhat.com
Subject: [PATCH v2 13/14] vfio_iommu_type1: specify FOLL_HINT_BULK to pin_user_pages()
Date: Wed, 20 Oct 2021 11:52:07 -0700	[thread overview]
Message-ID: <20211020185207.18509-1-ankur.a.arora@oracle.com> (raw)
In-Reply-To: <20211020170305.376118-1-ankur.a.arora@oracle.com>

Specify FOLL_HINT_BULK to pin_user_pages() so it is aware that
this pin is part of a larger region being pinned, so it can
optimize based on that expectation.

Cc: alex.williamson@redhat.com
Signed-off-by: Ankur Arora <ankur.a.arora@oracle.com>
---
 drivers/vfio/vfio_iommu_type1.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
index 0e9217687f5c..0d45b0c6464d 100644
--- a/drivers/vfio/vfio_iommu_type1.c
+++ b/drivers/vfio/vfio_iommu_type1.c
@@ -557,6 +557,9 @@ static int vaddr_get_pfns(struct mm_struct *mm, unsigned long vaddr,
 	if (prot & IOMMU_WRITE)
 		flags |= FOLL_WRITE;
 
+	/* Tell gup that this iterations is part of larger set of pins. */
+	flags |= FOLL_HINT_BULK;
+
 	mmap_read_lock(mm);
 	ret = pin_user_pages_remote(mm, vaddr, npages, flags | FOLL_LONGTERM,
 				    pages, NULL, NULL);
-- 
2.29.2


  parent reply	other threads:[~2021-10-20 18:52 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-20 17:02 [PATCH v2 00/14] Use uncached stores while clearing huge pages Ankur Arora
2021-10-20 17:02 ` [PATCH v2 01/14] x86/asm: add memset_movnti() Ankur Arora
2021-10-20 17:02 ` [PATCH v2 02/14] perf bench: " Ankur Arora
2021-10-20 17:02 ` [PATCH v2 03/14] x86/asm: add uncached page clearing Ankur Arora
2021-10-20 17:02 ` [PATCH v2 04/14] x86/asm: add clzero based " Ankur Arora
2021-10-20 17:02 ` [PATCH v2 05/14] x86/cpuid: add X86_FEATURE_MOVNT_SLOW Ankur Arora
2021-10-20 17:02 ` [PATCH v2 06/14] sparse: add address_space __incoherent Ankur Arora
2021-10-20 17:02 ` [PATCH v2 07/14] x86/clear_page: add clear_page_uncached() Ankur Arora
2021-12-08  8:58   ` Yu Xu
2021-12-10  4:37     ` Ankur Arora
2021-12-10  4:48       ` Yu Xu
2021-12-10 14:26         ` Ankur Arora
2021-10-20 17:02 ` [PATCH v2 08/14] mm/clear_page: add clear_page_uncached_threshold() Ankur Arora
2021-10-20 17:03 ` [PATCH v2 09/14] x86/clear_page: add arch_clear_page_uncached_threshold() Ankur Arora
2021-10-20 17:03 ` [PATCH v2 10/14] clear_huge_page: use uncached path Ankur Arora
2021-10-20 17:03 ` [PATCH v2 11/14] gup: add FOLL_HINT_BULK, FAULT_FLAG_UNCACHED Ankur Arora
2021-10-20 17:03 ` [PATCH v2 12/14] gup: use uncached path when clearing large regions Ankur Arora
2021-10-20 18:52 ` Ankur Arora [this message]
2021-10-20 18:52 ` [PATCH v2 14/14] x86/cpu/intel: set X86_FEATURE_MOVNT_SLOW for Skylake Ankur Arora

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=20211020185207.18509-1-ankur.a.arora@oracle.com \
    --to=ankur.a.arora@oracle.com \
    --cc=akpm@linux-foundation.org \
    --cc=alex.williamson@redhat.com \
    --cc=boris.ostrovsky@oracle.com \
    --cc=bp@alien8.de \
    --cc=jon.grimm@amd.com \
    --cc=konrad.wilk@oracle.com \
    --cc=kvm@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=luto@kernel.org \
    --cc=mike.kravetz@oracle.com \
    --cc=mingo@kernel.org \
    --cc=x86@kernel.org \
    /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
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
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).