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14558b9953
freebsd-dev/sys
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Richard Scheffenegger 14558b9953 Introduce a lower bound of 2 MSS to TCP Cubic. 
Running TCP Cubic together with ECN could end up reducing cwnd down to 1 byte, if the
receiver continously sets the ECE flag, resulting in very poor transmission speeds.

In line with RFC6582 App. B, a lower bound of 2 MSS is introduced, as well as a typecast
to prevent any potential integer overflows during intermediate calculation steps of the
adjusted cwnd.

Reported by:	Cheng Cui
Reviewed by:	tuexen (mentor)
Approved by:	tuexen (mentor)
MFC after:	2 weeks
Sponsored by:	NetApp, Inc.
Differential Revision:	https://reviews.freebsd.org/D23353
2020-04-30 11:11:28 +00:00
..
amd64 Remove an obsolete TODO comment from several minidump implementations. 2020-04-24 18:47:42 +00:00
arm Convert arm's physmem interface to MI code 2020-04-19 00:12:30 +00:00
arm64 Export tracing facility of GIC500 ITS block. 2020-04-29 14:31:25 +00:00
bsm bsm: add AUE_CLOSERANGE 2020-04-24 01:27:25 +00:00
cam Implement the NVME_GET_NSID and NVME_PASSTHROUGH_CMD ioctls 2020-04-30 00:43:07 +00:00
cddl Avoid the GEOM topology lock recursion when we automatically expand a pool. 2020-04-25 21:45:31 +00:00
compat sysent: re-roll after 360236 (AUE_CLOSERANGE used) 2020-04-24 01:30:33 +00:00
conf Move route-specific ddb commands to route/route_ddb.c 2020-04-28 20:00:17 +00:00
contrib Convert ipfilter to the new routing KPI. 2020-04-19 17:01:17 +00:00
crypto ccp: add a new hardware ID, found on AMD Ryzen 3 3200U 2020-04-24 10:20:54 +00:00
ddb Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (17 of many) 2020-02-26 14:26:36 +00:00
dev Make sure that we get the sbuf resources we need. 2020-04-30 00:43:11 +00:00
dts allwinner: aw_thermal: Cope with DTS changes 2020-04-14 19:05:17 +00:00
fs Get rid of uio_XXX macros used for the Mac OS/X port. 2020-04-28 02:11:02 +00:00
gdb Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (17 of many) 2020-02-26 14:26:36 +00:00
geom Add g_topology_locked() macro that returns true if we already hold the GEOM 2020-04-25 21:41:09 +00:00
gnu dts: Import DTS from Linux 5.6 2020-04-14 18:57:00 +00:00
i386 Remove an obsolete TODO comment from several minidump implementations. 2020-04-24 18:47:42 +00:00
isa sc(4) md bits: stop setting sc->kbd entirely 2019-12-30 02:07:55 +00:00
kern Don't try to set frequendcy for enumerated but newer started CPUs. 2020-04-29 14:14:15 +00:00
kgssapi Remove support for Kernel GSS algorithms deprecated in r348875. 2020-04-10 23:08:41 +00:00
libkern Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (17 of many) 2020-02-26 14:26:36 +00:00
mips Fix a race in pmap_emulate_modified(). 2020-04-24 21:21:49 +00:00
modules None of these use opt_sched.h 2020-04-28 16:09:18 +00:00
net Convert more rtentry field accesses into nhop fields accesses. 2020-04-29 21:54:09 +00:00
net80211 Don't indirect user pointers directly in two 802.11s ioctls. 2020-04-24 22:10:02 +00:00
netgraph Add le_read_buffer_size command and manpage. 2020-04-28 16:00:34 +00:00
netinet Introduce a lower bound of 2 MSS to TCP Cubic. 2020-04-30 11:11:28 +00:00
netinet6 Add nhop to the ifa_rtrequest() callback. 2020-04-29 19:28:56 +00:00
netipsec Fix name of 3DES cipher in deprecation warning. 2020-04-22 21:03:24 +00:00
netpfil Move route_temporal.c and route_var.h to net/route. 2020-04-28 19:14:09 +00:00
netsmb Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (17 of many) 2020-02-26 14:26:36 +00:00
nfs Remove rtable dumping code from bootp. 2020-04-28 07:23:41 +00:00
nfsclient
nfsserver
nlm Make nfslockd depend on xdr. 2020-04-23 09:37:22 +00:00
ofed Convert OFED rtable interactions to the new routing KPI. 2020-04-15 13:06:55 +00:00
opencrypto Retire the CRYPTO_F_IV_GENERATE flag. 2020-04-20 22:24:49 +00:00
powerpc Remove an obsolete TODO comment from several minidump implementations. 2020-04-24 18:47:42 +00:00
riscv Retire the GENERICSF kernel config. 2020-04-27 21:51:22 +00:00
rpc Split XDR into separate kernel module. Make krpc depend on xdr. 2020-04-17 06:04:20 +00:00
security audit_canon_path_vp: don't panic if cdir == NULL 2020-04-17 02:09:31 +00:00
sys Bump __FreeBSD_version for KTLS RX support. 2020-04-28 00:06:49 +00:00
teken
tests Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (17 of many) 2020-02-26 14:26:36 +00:00
tools vfs: stop null checking routines in vop wrappers 2020-01-26 00:41:38 +00:00
ufs Retire two unused background fsck sysctls. 2020-04-21 17:42:32 +00:00
vm Re-check for wirings after busying the page in vm_page_release_locked(). 2020-04-28 13:51:41 +00:00
x86 Fix handling of NMIs from unknown sources (BMC, hypervisor) 2020-04-26 00:41:29 +00:00
xdr Split XDR into separate kernel module. Make krpc depend on xdr. 2020-04-17 06:04:20 +00:00
xen Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (16 of many) 2020-02-25 19:04:39 +00:00
Makefile Remove sparc64 kernel support 2020-02-03 17:35:11 +00:00