From: Jason Wang <jasowang@redhat.com> To: jasowang@redhat.com, mst@redhat.com, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Cc: peterx@redhat.com, linux-mm@kvack.org, aarcange@redhat.com Subject: [RFC PATCH V2 0/5] vhost: accelerate metadata access through vmap() Date: Wed, 6 Mar 2019 02:18:07 -0500 [thread overview] Message-ID: <1551856692-3384-1-git-send-email-jasowang@redhat.com> (raw) This series tries to access virtqueue metadata through kernel virtual address instead of copy_user() friends since they had too much overheads like checks, spec barriers or even hardware feature toggling. This is done through setup kernel address through vmap() and resigter MMU notifier for invalidation. Test shows about 24% improvement on TX PPS. TCP_STREAM doesn't see obvious improvement. Thanks Changes from V4: - use invalidate_range() instead of invalidate_range_start() - track dirty pages Changes from V3: - don't try to use vmap for file backed pages - rebase to master Changes from V2: - fix buggy range overlapping check - tear down MMU notifier during vhost ioctl to make sure invalidation request can read metadata userspace address and vq size without holding vq mutex. Changes from V1: - instead of pinning pages, use MMU notifier to invalidate vmaps and remap duing metadata prefetch - fix build warning on MIPS Jason Wang (5): vhost: generalize adding used elem vhost: fine grain userspace memory accessors vhost: rename vq_iotlb_prefetch() to vq_meta_prefetch() vhost: introduce helpers to get the size of metadata area vhost: access vq metadata through kernel virtual address drivers/vhost/net.c | 6 +- drivers/vhost/vhost.c | 434 ++++++++++++++++++++++++++++++++++++++++++++------ drivers/vhost/vhost.h | 18 ++- 3 files changed, 407 insertions(+), 51 deletions(-) -- 1.8.3.1
WARNING: multiple messages have this Message-ID (diff)
From: Jason Wang <jasowang@redhat.com> To: jasowang@redhat.com, mst@redhat.com, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Cc: aarcange@redhat.com, linux-mm@kvack.org Subject: [RFC PATCH V2 0/5] vhost: accelerate metadata access through vmap() Date: Wed, 6 Mar 2019 02:18:07 -0500 [thread overview] Message-ID: <1551856692-3384-1-git-send-email-jasowang@redhat.com> (raw) This series tries to access virtqueue metadata through kernel virtual address instead of copy_user() friends since they had too much overheads like checks, spec barriers or even hardware feature toggling. This is done through setup kernel address through vmap() and resigter MMU notifier for invalidation. Test shows about 24% improvement on TX PPS. TCP_STREAM doesn't see obvious improvement. Thanks Changes from V4: - use invalidate_range() instead of invalidate_range_start() - track dirty pages Changes from V3: - don't try to use vmap for file backed pages - rebase to master Changes from V2: - fix buggy range overlapping check - tear down MMU notifier during vhost ioctl to make sure invalidation request can read metadata userspace address and vq size without holding vq mutex. Changes from V1: - instead of pinning pages, use MMU notifier to invalidate vmaps and remap duing metadata prefetch - fix build warning on MIPS Jason Wang (5): vhost: generalize adding used elem vhost: fine grain userspace memory accessors vhost: rename vq_iotlb_prefetch() to vq_meta_prefetch() vhost: introduce helpers to get the size of metadata area vhost: access vq metadata through kernel virtual address drivers/vhost/net.c | 6 +- drivers/vhost/vhost.c | 434 ++++++++++++++++++++++++++++++++++++++++++++------ drivers/vhost/vhost.h | 18 ++- 3 files changed, 407 insertions(+), 51 deletions(-) -- 1.8.3.1
next reply other threads:[~2019-03-06 7:18 UTC|newest] Thread overview: 185+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-03-06 7:18 Jason Wang [this message] 2019-03-06 7:18 ` [RFC PATCH V2 0/5] vhost: accelerate metadata access through vmap() Jason Wang 2019-03-06 7:18 ` [RFC PATCH V2 1/5] vhost: generalize adding used elem Jason Wang 2019-03-06 7:18 ` Jason Wang 2019-03-06 7:18 ` [RFC PATCH V2 2/5] vhost: fine grain userspace memory accessors Jason Wang 2019-03-06 7:18 ` Jason Wang 2019-03-06 10:45 ` Christophe de Dinechin 2019-03-06 10:45 ` Christophe de Dinechin 2019-03-06 10:45 ` Christophe de Dinechin 2019-03-07 2:38 ` Jason Wang 2019-03-07 2:38 ` Jason Wang 2019-03-07 2:38 ` Jason Wang 2019-03-06 7:18 ` [RFC PATCH V2 3/5] vhost: rename vq_iotlb_prefetch() to vq_meta_prefetch() Jason Wang 2019-03-06 7:18 ` Jason Wang 2019-03-06 7:18 ` [RFC PATCH V2 4/5] vhost: introduce helpers to get the size of metadata area Jason Wang 2019-03-06 10:56 ` Christophe de Dinechin 2019-03-06 10:56 ` Christophe de Dinechin 2019-03-07 2:40 ` Jason Wang 2019-03-07 2:40 ` Jason Wang 2019-03-06 18:43 ` Souptick Joarder 2019-03-06 18:43 ` Souptick Joarder 2019-03-07 2:42 ` Jason Wang 2019-03-07 2:42 ` Jason Wang 2019-03-06 7:18 ` Jason Wang 2019-03-06 7:18 ` [RFC PATCH V2 5/5] vhost: access vq metadata through kernel virtual address Jason Wang 2019-03-06 7:18 ` Jason Wang 2019-03-06 16:31 ` Michael S. Tsirkin 2019-03-06 16:31 ` Michael S. Tsirkin 2019-03-07 2:45 ` Jason Wang 2019-03-07 15:34 ` Michael S. Tsirkin 2019-03-07 15:34 ` Michael S. Tsirkin 2019-03-07 19:09 ` Jerome Glisse 2019-03-07 19:09 ` Jerome Glisse 2019-03-07 19:38 ` Andrea Arcangeli 2019-03-07 19:38 ` Andrea Arcangeli 2019-03-07 20:17 ` Jerome Glisse 2019-03-07 20:17 ` Jerome Glisse 2019-03-07 21:27 ` Andrea Arcangeli 2019-03-08 9:13 ` Jason Wang 2019-03-08 19:11 ` Andrea Arcangeli 2019-03-11 7:21 ` Jason Wang 2019-03-11 7:21 ` Jason Wang 2019-03-08 19:11 ` Andrea Arcangeli 2019-03-08 9:13 ` Jason Wang 2019-03-11 14:45 ` Jan Kara 2019-03-11 14:45 ` Jan Kara 2019-03-07 21:27 ` Andrea Arcangeli 2019-03-08 8:31 ` Jason Wang 2019-03-08 8:31 ` Jason Wang 2019-03-07 2:45 ` Jason Wang 2019-03-07 15:47 ` Michael S. Tsirkin 2019-03-07 17:56 ` Michael S. Tsirkin 2019-03-07 17:56 ` Michael S. Tsirkin 2019-03-07 19:16 ` Andrea Arcangeli 2019-03-08 8:50 ` Jason Wang 2019-03-08 8:50 ` Jason Wang 2019-03-08 14:58 ` Jerome Glisse 2019-03-11 7:18 ` Jason Wang 2019-03-11 7:18 ` Jason Wang 2019-03-08 14:58 ` Jerome Glisse 2019-03-08 19:48 ` Andrea Arcangeli 2019-03-08 19:48 ` Andrea Arcangeli 2019-03-08 20:06 ` Jerome Glisse 2019-03-08 20:06 ` Jerome Glisse 2019-03-11 7:40 ` Jason Wang 2019-03-11 7:40 ` Jason Wang 2019-03-11 12:48 ` Michael S. Tsirkin 2019-03-11 13:43 ` Andrea Arcangeli 2019-03-12 2:56 ` Jason Wang 2019-03-12 2:56 ` Jason Wang 2019-03-12 3:51 ` Michael S. Tsirkin 2019-03-12 3:51 ` Michael S. Tsirkin 2019-03-11 13:43 ` Andrea Arcangeli 2019-03-12 2:52 ` Jason Wang 2019-03-12 2:52 ` Jason Wang 2019-03-12 3:50 ` Michael S. Tsirkin 2019-03-12 3:50 ` Michael S. Tsirkin 2019-03-12 7:15 ` Jason Wang 2019-03-12 7:15 ` Jason Wang 2019-03-11 12:48 ` Michael S. Tsirkin 2019-03-07 19:16 ` Andrea Arcangeli 2019-03-07 19:17 ` Jerome Glisse 2019-03-07 19:17 ` Jerome Glisse 2019-03-08 2:21 ` Michael S. Tsirkin 2019-03-08 2:21 ` Michael S. Tsirkin 2019-03-08 2:55 ` Jerome Glisse 2019-03-08 2:55 ` Jerome Glisse 2019-03-08 3:16 ` Michael S. Tsirkin 2019-03-08 3:16 ` Michael S. Tsirkin 2019-03-08 3:40 ` Jerome Glisse 2019-03-08 3:40 ` Jerome Glisse 2019-03-08 3:43 ` Michael S. Tsirkin 2019-03-08 3:43 ` Michael S. Tsirkin 2019-03-08 3:45 ` Jerome Glisse 2019-03-08 9:15 ` Jason Wang 2019-03-08 9:15 ` Jason Wang 2019-03-08 3:45 ` Jerome Glisse 2019-03-08 8:58 ` Jason Wang 2019-03-08 8:58 ` Jason Wang 2019-03-08 12:56 ` Michael S. Tsirkin 2019-03-08 12:56 ` Michael S. Tsirkin 2019-03-08 15:02 ` Jerome Glisse 2019-03-08 15:02 ` Jerome Glisse 2019-03-08 19:13 ` Andrea Arcangeli 2019-03-08 19:13 ` Andrea Arcangeli 2019-03-07 15:47 ` Michael S. Tsirkin 2019-03-08 14:12 ` [RFC PATCH V2 0/5] vhost: accelerate metadata access through vmap() Christoph Hellwig 2019-03-08 14:12 ` Christoph Hellwig 2019-03-08 14:12 ` Christoph Hellwig 2019-03-11 7:13 ` Jason Wang 2019-03-11 7:13 ` Jason Wang 2019-03-11 7:13 ` Jason Wang 2019-03-11 13:59 ` Michael S. Tsirkin 2019-03-11 13:59 ` Michael S. Tsirkin 2019-03-11 13:59 ` Michael S. Tsirkin 2019-03-11 18:14 ` David Miller 2019-03-11 18:14 ` David Miller 2019-03-11 18:14 ` David Miller 2019-03-12 2:59 ` Jason Wang 2019-03-12 2:59 ` Jason Wang 2019-03-12 3:52 ` Michael S. Tsirkin 2019-03-12 3:52 ` Michael S. Tsirkin 2019-03-12 3:52 ` Michael S. Tsirkin 2019-03-12 7:17 ` Jason Wang 2019-03-12 7:17 ` Jason Wang 2019-03-12 11:54 ` Michael S. Tsirkin 2019-03-12 11:54 ` Michael S. Tsirkin 2019-03-12 11:54 ` Michael S. Tsirkin 2019-03-12 15:46 ` James Bottomley 2019-03-12 15:46 ` James Bottomley 2019-03-12 15:46 ` James Bottomley 2019-03-12 20:04 ` Andrea Arcangeli 2019-03-12 20:04 ` Andrea Arcangeli 2019-03-12 20:04 ` Andrea Arcangeli 2019-03-12 20:53 ` James Bottomley 2019-03-12 20:53 ` James Bottomley 2019-03-12 20:53 ` James Bottomley 2019-03-12 21:11 ` Andrea Arcangeli 2019-03-12 21:11 ` Andrea Arcangeli 2019-03-12 21:11 ` Andrea Arcangeli 2019-03-12 21:19 ` James Bottomley 2019-03-12 21:19 ` James Bottomley 2019-03-12 21:19 ` James Bottomley 2019-03-12 21:53 ` Andrea Arcangeli 2019-03-12 21:53 ` Andrea Arcangeli 2019-03-12 22:02 ` James Bottomley 2019-03-12 22:02 ` James Bottomley 2019-03-12 22:02 ` James Bottomley 2019-03-12 22:50 ` Andrea Arcangeli 2019-03-12 22:50 ` Andrea Arcangeli 2019-03-12 22:50 ` Andrea Arcangeli 2019-03-12 22:57 ` James Bottomley 2019-03-12 22:57 ` James Bottomley 2019-03-12 22:57 ` James Bottomley 2019-03-12 21:53 ` Andrea Arcangeli 2019-03-13 16:05 ` Christoph Hellwig 2019-03-13 16:05 ` Christoph Hellwig 2019-03-13 16:05 ` Christoph Hellwig 2019-03-13 16:37 ` James Bottomley 2019-03-13 16:37 ` James Bottomley 2019-03-13 16:37 ` James Bottomley 2019-03-14 10:42 ` Michael S. Tsirkin 2019-03-14 10:42 ` Michael S. Tsirkin 2019-03-14 10:42 ` Michael S. Tsirkin 2019-03-14 13:49 ` Jason Wang 2019-03-14 13:49 ` Jason Wang 2019-03-14 13:49 ` Jason Wang 2019-03-14 19:33 ` Andrea Arcangeli 2019-03-14 19:33 ` Andrea Arcangeli 2019-03-15 4:39 ` Jason Wang 2019-03-15 4:39 ` Jason Wang 2019-03-15 4:39 ` Jason Wang 2019-03-14 19:33 ` Andrea Arcangeli 2019-03-13 16:05 ` Christoph Hellwig 2019-03-12 7:17 ` Jason Wang 2019-03-12 5:14 ` James Bottomley 2019-03-12 5:14 ` James Bottomley 2019-03-12 5:14 ` James Bottomley 2019-03-12 7:51 ` Jason Wang 2019-03-12 7:51 ` Jason Wang 2019-03-12 7:51 ` Jason Wang 2019-03-12 7:53 ` Jason Wang 2019-03-12 7:53 ` Jason Wang 2019-03-12 7:53 ` Jason Wang 2019-03-12 2:59 ` Jason Wang
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=1551856692-3384-1-git-send-email-jasowang@redhat.com \ --to=jasowang@redhat.com \ --cc=aarcange@redhat.com \ --cc=kvm@vger.kernel.org \ --cc=linux-kernel@vger.kernel.org \ --cc=linux-mm@kvack.org \ --cc=mst@redhat.com \ --cc=netdev@vger.kernel.org \ --cc=peterx@redhat.com \ --cc=virtualization@lists.linux-foundation.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: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.