On Wed, Apr 14, 2021 at 1:25 PM Eric Dumazet wrote:
>
> On Wed, Apr 14, 2021 at 10:15 PM Arjun Roy wrote:
> >
> > On Wed, Apr 14, 2021 at 10:35 AM Eric Dumazet wrote:
> > >
> > > On Wed, Apr 14, 2021 at 7:15 PM Arjun Roy wrote:
> > > >
>
On Wed, Apr 14, 2021 at 10:35 AM Eric Dumazet wrote:
>
> On Wed, Apr 14, 2021 at 7:15 PM Arjun Roy wrote:
> >
> > On Wed, Apr 14, 2021 at 9:10 AM Eric Dumazet wrote:
> > >
> > > On Wed, Apr 14, 2021 at 6:08 PM David Laight
> > > wrote:
> >
On Wed, Apr 14, 2021 at 9:10 AM Eric Dumazet wrote:
>
> On Wed, Apr 14, 2021 at 6:08 PM David Laight wrote:
> >
> > From: Eric Dumazet
> > > Sent: 14 April 2021 17:00
> > ...
> > > > Repeated unsafe_get_user() calls are crying out for an optimisation.
> > > > You get something like:
> > > >
On Tue, Apr 13, 2021 at 2:19 PM David Laight wrote:
>
> > If we're special-casing 64-bit architectures anyways - unrolling the
> > 32B copy_from_user() for struct rseq_cs appears to be roughly 5-10%
> > savings on x86-64 when I measured it (well, in a microbenchmark, not
> > in rseq_get_rseq_cs()
On Tue, Apr 13, 2021 at 11:22 AM Eric Dumazet wrote:
>
> On Tue, Apr 13, 2021 at 8:00 PM Mathieu Desnoyers
> wrote:
> >
>
> > As long as the ifdefs are localized within clearly identified wrappers in
> > the
> > rseq code I don't mind doing the special-casing there.
> >
> > The point which
On Wed, Mar 24, 2021 at 2:24 PM Johannes Weiner wrote:
>
> On Wed, Mar 24, 2021 at 10:12:46AM +0100, Michal Hocko wrote:
> > On Tue 23-03-21 11:47:54, Arjun Roy wrote:
> > > On Tue, Mar 23, 2021 at 7:34 AM Michal Hocko wrote:
> > > >
> > > > On
On Wed, Mar 24, 2021 at 11:26 AM Shakeel Butt wrote:
>
> On Tue, Mar 23, 2021 at 11:42 AM Arjun Roy wrote:
> >
> [...]
> >
> > To summarize then, it seems to me that we're on the same page now.
> > I'll put together a tentative v3 such that:
> > 1. It use
On Wed, Mar 24, 2021 at 2:12 AM Michal Hocko wrote:
>
> On Tue 23-03-21 11:47:54, Arjun Roy wrote:
> > On Tue, Mar 23, 2021 at 7:34 AM Michal Hocko wrote:
> > >
> > > On Wed 17-03-21 18:12:55, Johannes Weiner wrote:
> > > [...]
> > > > Here is a
On Tue, Mar 23, 2021 at 7:34 AM Michal Hocko wrote:
>
> On Wed 17-03-21 18:12:55, Johannes Weiner wrote:
> [...]
> > Here is an idea of how it could work:
> >
> > struct page already has
> >
> > struct {/* page_pool used by netstack */
> > /**
> >
On Tue, Mar 23, 2021 at 10:01 AM Johannes Weiner wrote:
>
> On Mon, Mar 22, 2021 at 02:35:11PM -0700, Arjun Roy wrote:
> > To make sure we're on the same page, then, here's a tentative
> > mechanism - I'd rather get buy in before spending too much time on
> > something t
On Wed, Mar 17, 2021 at 3:12 PM Johannes Weiner wrote:
>
> On Tue, Mar 16, 2021 at 11:05:11PM -0700, Arjun Roy wrote:
> > On Tue, Mar 16, 2021 at 3:27 AM Johannes Weiner wrote:
> > >
> > > Hello,
> > >
> > > On Mon, Mar 15, 2021 at 09:16:45PM
On Wed, Mar 17, 2021 at 8:21 PM Andrew Morton wrote:
>
> On Mon, 15 Mar 2021 18:30:03 -0700 Arjun Roy wrote:
>
> > From: Arjun Roy
> >
> > TCP zerocopy receive is used by high performance network applications
> > to further scale. For RX zerocopy, the memor
On Tue, Mar 16, 2021 at 3:27 AM Johannes Weiner wrote:
>
> Hello,
>
> On Mon, Mar 15, 2021 at 09:16:45PM -0700, Arjun Roy wrote:
> > From: Arjun Roy
> >
> > TCP zerocopy receive is used by high performance network applications
> > to further scale. Fo
On Mon, Mar 15, 2021 at 11:22 PM Arjun Roy wrote:
>
> On Mon, Mar 15, 2021 at 9:29 PM Shakeel Butt wrote:
> >
> > On Mon, Mar 15, 2021 at 9:20 PM Arjun Roy wrote:
> > >
> > [...]
> > > >
> > >
> > > Apologies for the spam - loo
On Mon, Mar 15, 2021 at 9:29 PM Shakeel Butt wrote:
>
> On Mon, Mar 15, 2021 at 9:20 PM Arjun Roy wrote:
> >
> [...]
> > >
> >
> > Apologies for the spam - looks like I forgot to rebase the first time
> > I sent this out.
> >
> > Actually
On Mon, Mar 15, 2021 at 9:16 PM Arjun Roy wrote:
>
> From: Arjun Roy
>
> TCP zerocopy receive is used by high performance network applications
> to further scale. For RX zerocopy, the memory containing the network
> data filled by the network driver is directly mapped into t
From: Arjun Roy
TCP zerocopy receive is used by high performance network applications
to further scale. For RX zerocopy, the memory containing the network
data filled by the network driver is directly mapped into the address
space of high performance applications. To keep the TLB cost low
From: Arjun Roy
TCP zerocopy receive is used by high performance network applications
to further scale. For RX zerocopy, the memory containing the network
data filled by the network driver is directly mapped into the address
space of high performance applications. To keep the TLB cost low
On Sun, Feb 14, 2021 at 1:13 PM Stephen Rothwell wrote:
>
> Hi all,
>
> On Mon, 25 Jan 2021 11:12:23 +1100 Stephen Rothwell
> wrote:
> >
> > Today's linux-next merge of the bpf-next tree got a conflict in:
> >
> > net/ipv4/tcp.c
> >
> > between commit:
> >
> > 7eeba1706eba ("tcp: Add
On Sun, Jan 24, 2021 at 4:12 PM Stephen Rothwell wrote:
>
> Hi all,
>
> Today's linux-next merge of the bpf-next tree got a conflict in:
>
> net/ipv4/tcp.c
>
> between commit:
>
> 7eeba1706eba ("tcp: Add receive timestamp support for receive zerocopy.")
>
> from the net-next tree and commit:
> > > > On Tue, Jan 12, 2021 at 04:18:44PM -0800, Shakeel Butt wrote:
> > > > > On Tue, Jan 12, 2021 at 4:12 PM Arjun Roy wrote:
> > > > > >
> > > > > > On Tue, Jan 12, 2021 at 3:48 PM Roman Gushchin wrote:
> > > > &
On Wed, Jan 13, 2021 at 10:48 AM Roman Gushchin wrote:
>
> On Tue, Jan 12, 2021 at 04:12:08PM -0800, Arjun Roy wrote:
> > On Tue, Jan 12, 2021 at 3:48 PM Roman Gushchin wrote:
> > >
> > > On Tue, Jan 12, 2021 at 03:36:18PM -0800, Arjun Roy wrote:
> > >
On Tue, Jan 12, 2021 at 3:48 PM Roman Gushchin wrote:
>
> On Tue, Jan 12, 2021 at 03:36:18PM -0800, Arjun Roy wrote:
> > On Tue, Jan 12, 2021 at 3:31 PM Roman Gushchin wrote:
> > >
> > > On Tue, Jan 12, 2021 at 01:41:05PM -0800, Shakeel Butt wrote:
> > >
On Tue, Jan 12, 2021 at 3:31 PM Roman Gushchin wrote:
>
> On Tue, Jan 12, 2021 at 01:41:05PM -0800, Shakeel Butt wrote:
> > From: Arjun Roy
> >
> > TCP zerocopy receive is used by high performance network applications to
> > further scale. For RX zerocopy, the memo
Ack, and thank you very much for the fix.
-Arjun
On Tue, Jun 9, 2020 at 4:30 PM Stephen Rothwell wrote:
>
> Hi all,
>
> Today's linux-next merge of the net tree got a conflict in:
>
> net/ipv4/tcp.c
>
> between commit:
>
> d8ed45c5dcd4 ("mmap locking API: use coccinelle to convert mmap_sem
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