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  1. 26 4月, 2007 1 次提交
    • E
      [NET]: convert network timestamps to ktime_t · b7aa0bf7
      由 Eric Dumazet 提交于 
      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: NEric Dumazet <dada1@cosmosbay.com>
CC: Stephen Hemminger <shemminger@linux-foundation.org>
CC: John find <linux.kernel@free.fr>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      b7aa0bf7
  3. 05 4月, 2007 1 次提交
  5. 17 2月, 2007 2 次提交
  7. 01 10月, 2006 1 次提交
  9. 27 6月, 2006 1 次提交
  11. 01 4月, 2006 1 次提交
    • K
      Fix comments: s/granuality/granularity/ · 8ba8e95e
      由 Kalin KOZHUHAROV 提交于 
      I was grepping through the code and some `grep ganularity -R .` didn't
catch what I thought. Then looking closer I saw the term "granuality"
used in only four places (in comments) and granularity in many more
places describing the same idea. Some other facts:

dictionary.com does not know such a word
define:granuality on google is not found (and pages for granuality are
mostly related to patches to the kernel)
it has not been discussed as a term on LKML, AFAICS (=Can Search)

To be consistent, I think granularity should be used everywhere.
Signed-off-by: NKalin KOZHUHAROV <kalin@thinrope.net>
Signed-off-by: NAdrian Bunk <bunk@stusta.de>
      8ba8e95e
  13. 27 3月, 2006 1 次提交
  15. 26 3月, 2006 1 次提交
  17. 04 2月, 2006 1 次提交
  19. 01 2月, 2006 1 次提交
  21. 12 1月, 2006 1 次提交
  23. 11 1月, 2006 6 次提交
  25. 13 12月, 2005 1 次提交
    • M
      [PATCH] Add getnstimestamp function · 64123fd4
      由 Matt Helsley 提交于 
      There are several functions that might seem appropriate for a timestamp:

get_cycles()
current_kernel_time()
do_gettimeofday()
<read jiffies/jiffies_64>

Each has problems with combinations of SMP-safety, low resolution, and
monotonicity. This patch adds a new function that returns a monotonic SMP-safe
timestamp with nanosecond resolution where available.

Changes:
	Split timestamp into separate patch
	Moved to kernel/time.c
	Renamed to getnstimestamp
	Fixed unintended-pointer-arithmetic bug
Signed-off-by: NMatt Helsley <matthltc@us.ibm.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      64123fd4
  27. 31 10月, 2005 1 次提交
    • J
      [PATCH] NTP shift_right cleanup · 1bb34a41
      由 john stultz 提交于 
      Create a macro shift_right() that avoids the numerous ugly conditionals in the
NTP code that look like:

        if(a < 0)
                b = -(-a >> shift);
        else
                b = a >> shift;

Replacing it with:

        b = shift_right(a, shift);

This should have zero effect on the logic, however it should probably have
a bit of testing just to be sure.

Also replace open-coded min/max with the macros.

Signed-off-by : John Stultz <johnstul@us.ibm.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      1bb34a41
  29. 30 10月, 2005 1 次提交
  31. 15 10月, 2005 1 次提交
  33. 28 7月, 2005 1 次提交
  35. 28 4月, 2005 1 次提交
    • C
      [PATCH] time interpolator: Fix settimeofday inaccuracy · 9acf6597
      由 Christoph Lameter 提交于 
      settimeofday will set the time a little bit too early on systems using
time interpolation since it subtracts the current interpolator offset
from the time. This used to be necessary with the code in 2.6.9 and earlier
but the new code resets the time interpolator after setting the time.
Thus the time is set too early and gettimeofday will return a time slightly
before the time specified with settimeofday if invoked immeditely after
settimeofday.

This removes the obsolete subtraction of the time interpolator offset
and makes settimeofday set the time accurately. 
Signed-off-by: NChristoph Lameter <clameter@sgi.com>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      9acf6597
  37. 17 4月, 2005 1 次提交
    • L
      Linux-2.6.12-rc2 · 1da177e4
      由 Linus Torvalds 提交于 
      Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
      1da177e4