Arnd Bergmann 7f5d3f2721 pktgen: document 32-bit timestamp overflow ... Timestamps in pktgen are currently retrieved using the deprecated do_gettimeofday() function that wraps its signed 32-bit seconds in 2038 (on 32-bit architectures) and requires a division operation to calculate microseconds. The pktgen header is also defined with the same limitations, hardcoding to a 32-bit seconds field that can be interpreted as unsigned to produce times that only wrap in 2106. Whatever code reads the timestamps should be aware of that problem in general, but probably doesn't care too much as we are mostly interested in the time passing between packets, and that is correctly represented. Using 64-bit nanoseconds would be cheaper and good for 584 years. Using monotonic times would also make this unambiguous by avoiding the overflow, but would make it harder to correlate to the times with those on remote machines. Either approach would require adding a new runtime flag and implementing the same thing on the remote side, which we probably don't want to do unless someone sees it as a real problem. Also, this should be coordinated with other pktgen implementations and might need a new magic number. For the moment, I'm documenting the overflow in the source code, and changing the implementation over to an open-coded ktime_get_real_ts64() plus division, so we don't have to look at it again while scanning for deprecated time interfaces. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: David S. Miller <davem@davemloft.net>		2017-11-08 15:56:12 +09:00
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6lowpan	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
9p	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
802	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
8021q	add support of IFF_XMIT_DST_RELEASE bit in vlan	2017-11-04 22:33:06 +09:00
appletalk	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
atm	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
ax25	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
batman-adv	batman-adv: Avoid spurious warnings from bat_v neigh_cmp implementation	2017-10-17 08:09:47 +02:00
bluetooth	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
bpf	bpf: add meta pointer for direct access	2017-09-26 13:36:44 -07:00
bridge	Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next	2017-11-08 14:22:50 +09:00
caif	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
can	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
ceph	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
core	pktgen: document 32-bit timestamp overflow	2017-11-08 15:56:12 +09:00
dcb	rtnetlink: make rtnl_register accept a flags parameter	2017-08-09 16:57:38 -07:00
dccp	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
decnet	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
dns_resolver	KEYS: Fix race between updating and finding a negative key	2017-10-18 09:12:40 +01:00
dsa	net: dsa: lan9303: Adjust indenting	2017-11-08 13:29:06 +09:00
ethernet	networking: make skb_push & __skb_push return void pointers	2017-06-16 11:48:40 -04:00
hsr	net: hsr: Convert timers to use timer_setup()	2017-10-25 13:00:27 +09:00
ieee802154	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
ife	MAINTAINERS: Update Yotam's E-mail	2017-11-01 12:19:03 +09:00
ipv4	Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next	2017-11-08 14:22:50 +09:00
ipv6	Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next	2017-11-08 14:22:50 +09:00
ipx	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
iucv	iucv: Convert sk_wmem_alloc accesses to refcount_t.	2017-07-03 02:31:22 -07:00
kcm	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
key	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-08-15 20:23:23 -07:00
l2tp	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
l3mdev	…
lapb	net/lapb: Convert timers to use timer_setup()	2017-10-18 12:39:36 +01:00
llc	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
mac80211	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
mac802154	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
mpls	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
ncsi	net/ncsi: Make local function ncsi_get_filter() static	2017-11-03 15:44:10 +09:00
netfilter	Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next	2017-11-08 14:22:50 +09:00
netlabel	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
netlink	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
netrom	net: netrom: nr_route: mark expected switch fall-throughs	2017-11-01 20:46:41 +09:00
nfc	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
nsh	nsh: add GSO support	2017-08-29 15:16:52 -07:00
openvswitch	openvswitch: reliable interface indentification in port dumps	2017-11-05 21:49:17 +09:00
packet	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
phonet	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
psample	MAINTAINERS: Update Yotam's E-mail	2017-11-01 12:19:03 +09:00
qrtr	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
rds	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
rfkill	net: rfkill: gpio: Switch to devm_acpi_dev_add_driver_gpios()	2017-06-13 11:07:51 +02:00
rose	net: rose: mark expected switch fall-throughs	2017-10-22 02:02:26 +01:00
rxrpc	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
sched	net_sch: cbs: Change TC_SETUP_CBS to TC_SETUP_QDISC_CBS	2017-11-08 12:23:38 +09:00
sctp	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
smc	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
strparser	strparser: Use delayed work instead of timer for msg timeout	2017-10-25 10:37:11 +09:00
sunrpc	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
switchdev	net: switchdev: Remove bridge bypass support from switchdev	2017-08-07 14:48:48 -07:00
tipc	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
tls	tls: make tls_sw_free_resources static	2017-09-14 09:55:21 -07:00
unix	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
vmw_vsock	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
wimax	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
wireless	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
x25	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
xfrm	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
Kconfig	net: Remove CONFIG_NETFILTER_DEBUG and _ASSERT() macros.	2017-09-04 13:25:20 +02:00
Makefile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
compat.c	net: compat: assert the size of cmsg copied in is as expected	2017-09-20 15:36:18 -07:00
socket.c	net: fixes for skb_send_sock	2017-08-16 11:27:52 -07:00
sysctl_net.c	sysctl: Remove dead register_sysctl_root	2017-04-16 23:42:49 -05:00