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4f661542a4
linux/include
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Eric Dumazet 4f661542a4 tcp: fix zerocopy and notsent_lowat issues 
My recent patch had at least three problems :

1) TX zerocopy wants notification when skb is acknowledged,
   thus we need to call skb_zcopy_clear() if the skb is
   cached into sk->sk_tx_skb_cache

2) Some applications might expect precise EPOLLOUT
   notifications, so we need to update sk->sk_wmem_queued
   and call sk_mem_uncharge() from sk_wmem_free_skb()
   in all cases. The SOCK_QUEUE_SHRUNK flag must also be set.

3) Reuse of saved skb should have used skb_cloned() instead
  of simply checking if the fast clone has been freed.

Fixes: 472c2e07ee ("tcp: add one skb cache for tx")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Willem de Bruijn <willemb@google.com>
Cc: Soheil Hassas Yeganeh <soheil@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Tested-by: Holger Hoffstätte <holger@applied-asynchrony.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-03-27 13:59:02 -07:00
..
acpi ACPI updates for 5.1-rc1 2019-03-06 13:33:11 -08:00
asm-generic Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-03-10 14:46:56 -07:00
clocksource
crypto crypto: export arc4 defines 2019-02-15 13:21:55 +08:00
drm drm next pull request for 5.1 2019-03-08 08:23:15 -08:00
dt-bindings We have a fairly balanced mix of clk driver updates and clk framework 2019-03-14 08:46:17 -07:00
keys Merge branch 'next-integrity' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2019-03-10 17:32:04 -07:00
kvm
linux Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next 2019-03-26 21:44:13 -07:00
math-emu
media media: include: fix several typos 2019-03-01 09:45:52 -05:00
memory
misc
net tcp: fix zerocopy and notsent_lowat issues 2019-03-27 13:59:02 -07:00
pcmcia
ras
rdma RDMA: Handle ucontext allocations by IB/core 2019-02-22 14:11:37 -07:00
scsi scsi: kill command serial number 2019-02-27 09:19:24 -05:00
soc IOMMU Updates for Linux v5.1 2019-03-10 12:29:52 -07:00
sound Char/Misc driver patches for 5.1-rc1 2019-03-06 14:18:59 -08:00
target
trace dmaengine updates for v5.1-rc1 2019-03-14 09:11:54 -07:00
uapi net: openvswitch: Add a new action check_pkt_len 2019-03-27 13:53:23 -07:00
video media updates for v5.1-rc1 2019-03-09 14:45:54 -08:00
xen x86/xen: dont add memory above max allowed allocation 2019-02-18 06:52:51 +01:00