kernel-ark/net/sunrpc
Eric Dumazet b7aa0bf70c [NET]: convert network timestamps to ktime_t
We currently use a special structure (struct skb_timeval) and plain
'struct timeval' to store packet timestamps in sk_buffs and struct
sock.

This has some drawbacks :
- Fixed resolution of micro second.
- Waste of space on 64bit platforms where sizeof(struct timeval)=16

I suggest using ktime_t that is a nice abstraction of high resolution
time services, currently capable of nanosecond resolution.

As sizeof(ktime_t) is 8 bytes, using ktime_t in 'struct sock' permits
a 8 byte shrink of this structure on 64bit architectures. Some other
structures also benefit from this size reduction (struct ipq in
ipv4/ip_fragment.c, struct frag_queue in ipv6/reassembly.c, ...)

Once this ktime infrastructure adopted, we can more easily provide
nanosecond resolution on top of it. (ioctl SIOCGSTAMPNS and/or
SO_TIMESTAMPNS/SCM_TIMESTAMPNS)

Note : this patch includes a bug correction in
compat_sock_get_timestamp() where a "err = 0;" was missing (so this
syscall returned -ENOENT instead of 0)

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
CC: Stephen Hemminger <shemminger@linux-foundation.org>
CC: John find <linux.kernel@free.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-04-25 22:23:34 -07:00
..
auth_gss Merge branch 'master' of /home/trondmy/kernel/linux-2.6/ 2007-02-12 22:43:25 -08:00
auth_null.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
auth_unix.c SUNRPC: fix print format for tk_pid 2007-02-03 15:35:10 -08:00
auth.c Merge branch 'master' of /home/trondmy/kernel/linux-2.6/ 2007-02-12 22:43:25 -08:00
cache.c Merge branch 'master' of /home/trondmy/kernel/linux-2.6/ 2007-02-12 22:43:25 -08:00
clnt.c RPC: Fix the TCP resend semantics for NFSv4 2007-04-20 22:56:30 -07:00
Makefile
pmap_clnt.c Merge branch 'master' of /home/trondmy/kernel/linux-2.6/ 2007-02-12 22:43:25 -08:00
rpc_pipe.c Merge branch 'master' of /home/trondmy/kernel/linux-2.6/ 2007-02-12 22:43:25 -08:00
sched.c Merge branch 'master' of /home/trondmy/kernel/linux-2.6/ 2007-02-12 22:43:25 -08:00
socklib.c SUNRPC: Rename skb_reader_t and friends 2006-12-06 10:46:52 -05:00
stats.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
sunrpc_syms.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
svc.c [PATCH] knfsd: provide sunrpc pool_mode module option 2007-03-06 09:30:26 -08:00
svcauth_unix.c knfsd: use a spinlock to protect sk_info_authunix 2007-04-17 16:36:27 -07:00
svcauth.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
svcsock.c [NET]: convert network timestamps to ktime_t 2007-04-25 22:23:34 -07:00
sysctl.c [PATCH] sysctl: remove insert_at_head from register_sysctl 2007-02-14 08:09:59 -08:00
timer.c SUNRPC: remove extraneous header inclusions 2006-09-22 23:24:47 -04:00
xdr.c [NET] SUNRPC: Fix whitespace errors. 2007-02-10 23:20:13 -08:00
xprt.c RPC: Fix the TCP resend semantics for NFSv4 2007-04-20 22:56:30 -07:00
xprtsock.c [PATCH] sysctl: remove insert_at_head from register_sysctl 2007-02-14 08:09:59 -08:00