From: a...@linux-foundation.org Date: Sun, 07 Jun 2020 18:54:41 -0700 > From: Arjun Roy <arjun...@google.com> > Subject: net-zerocopy: use vm_insert_pages() for tcp rcv zerocopy > > Use vm_insert_pages() for tcp receive zerocopy. Spin lock cycles (as > reported by perf) drop from a couple of percentage points to a fraction of > a percent. This results in a roughly 6% increase in efficiency, measured > roughly as zerocopy receive count divided by CPU utilization. > > The intention of this patchset is to reduce atomic ops for tcp zerocopy > receives, which normally hits the same spinlock multiple times > consecutively. > > [a...@linux-foundation.org: suppress gcc-7.2.0 warning] > Link: http://lkml.kernel.org/r/20200128025958.43490-3-arjunroy.k...@gmail.com > Signed-off-by: Arjun Roy <arjun...@google.com> > Signed-off-by: Eric Dumazet <eduma...@google.com> > Signed-off-by: Soheil Hassas Yeganeh <soh...@google.com> > Cc: David Miller <da...@davemloft.net> > Cc: Matthew Wilcox <wi...@infradead.org> > Cc: Jason Gunthorpe <j...@ziepe.ca> > Cc: Stephen Rothwell <s...@canb.auug.org.au> > Signed-off-by: Andrew Morton <a...@linux-foundation.org>
Applied, thank you.
