Eric Dumazet 563d34d057 tcp: dont drop MTU reduction indications ... ICMP messages generated in output path if frame length is bigger than mtu are actually lost because socket is owned by user (doing the xmit) One example is the ipgre_tunnel_xmit() calling icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, htonl(mtu)); We had a similar case fixed in commit a34a101e1e (ipv6: disable GSO on sockets hitting dst_allfrag). Problem of such fix is that it relied on retransmit timers, so short tcp sessions paid a too big latency increase price. This patch uses the tcp_release_cb() infrastructure so that MTU reduction messages (ICMP messages) are not lost, and no extra delay is added in TCP transmits. Reported-by: Maciej Żenczykowski <maze@google.com> Diagnosed-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Nandita Dukkipati <nanditad@google.com> Cc: Tom Herbert <therbert@google.com> Cc: Tore Anderson <tore@fud.no> Signed-off-by: David S. Miller <davem@davemloft.net>		2012-07-23 00:58:46 -07:00
..
acpi	ACPI: fix acpi_bus.h build warnings when ACPI is not enabled	2012-06-04 00:29:11 -04:00
asm-generic	mm: cma: fix condition check when setting global cma area	2012-07-06 12:02:04 +02:00
crypto
drm	drm: drop comment about this header being autogenerated.	2012-06-22 11:04:55 +01:00
keys
linux	tcp: dont drop MTU reduction indications	2012-07-23 00:58:46 -07:00
math-emu
media	[media] patch for Asus My Cinema PS3-100 (1043:48cd)	2012-05-20 16:05:02 -03:00
memory
misc
mtd	UBI: amend commentaries WRT dtype	2012-05-20 20:25:59 +03:00
net	tcp: dont drop MTU reduction indications	2012-07-23 00:58:46 -07:00
pcmcia
rdma	Merge branches 'core', 'cxgb4', 'ipath', 'iser', 'lockdep', 'mlx4', 'nes', 'ocrdma', 'qib' and 'raw-qp' into for-linus	2012-05-21 09:00:47 -07:00
rxrpc
scsi	[SCSI] libsas: fix taskfile corruption in sas_ata_qc_fill_rtf	2012-07-08 09:49:14 +01:00
sound	Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media	2012-06-25 14:53:09 -07:00
target	target: Add TFO->put_session() caller for HW fabric session shutdown	2012-06-12 19:33:05 -07:00
trace	rcu: Update RCU_FAST_NO_HZ tracing for lazy callbacks	2012-06-06 20:43:27 -07:00
video	fbdev updates for 3.5	2012-06-01 16:57:51 -07:00
xen	xen: do not map the same GSI twice in PVHVM guests.	2012-05-21 14:11:36 -04:00
Kbuild