1. 26 Aug, 2011 1 commit
  2. 20 Jul, 2011 1 commit
  3. 28 May, 2011 1 commit
    • Eric W. Biederman's avatar
      ns: Wire up the setns system call · 7b21fddd
      Eric W. Biederman authored
      32bit and 64bit on x86 are tested and working.  The rest I have looked
      at closely and I can't find any problems.
      
      setns is an easy system call to wire up.  It just takes two ints so I
      don't expect any weird architecture porting problems.
      
      While doing this I have noticed that we have some architectures that are
      very slow to get new system calls.  cris seems to be the slowest where
      the last system calls wired up were preadv and pwritev.  avr32 is weird
      in that recvmmsg was wired up but never declared in unistd.h.  frv is
      behind with perf_event_open being the last syscall wired up.  On h8300
      the last system call wired up was epoll_wait.  On m32r the last system
      call wired up was fallocate.  mn10300 has recvmmsg as the last system
      call wired up.  The rest seem to at least have syncfs wired up which was
      new in the 2.6.39.
      
      v2: Most of the architecture support added by Daniel Lezcano <dlezcano@fr.ibm.com>
      v3: ported to v2.6.36-rc4 by: Eric W. Biederman <ebiederm@xmission.com>
      v4: Moved wiring up of the system call to another patch
      v5: ported to v2.6.39-rc6
      v6: rebased onto parisc-next and net-next to avoid syscall  conflicts.
      v7: ported to Linus's latest post 2.6.39 tree.
      
      >  arch/blackfin/include/asm/unistd.h     |    3 ++-
      >  arch/blackfin/mach-common/entry.S      |    1 +
      Acked-by: default avatarMike Frysinger <vapier@gentoo.org>
      
      Oh - ia64 wiring looks good.
      Acked-by: default avatarTony Luck <tony.luck@intel.com>
      Signed-off-by: default avatarEric W. Biederman <ebiederm@xmission.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      7b21fddd
  4. 19 May, 2011 1 commit
  5. 10 May, 2011 1 commit
  6. 25 Mar, 2011 2 commits
  7. 18 Oct, 2010 2 commits
  8. 04 Oct, 2010 1 commit
  9. 13 Oct, 2009 1 commit
    • Arnaldo Carvalho de Melo's avatar
      net: Introduce recvmmsg socket syscall · a2e27255
      Arnaldo Carvalho de Melo authored
      Meaning receive multiple messages, reducing the number of syscalls and
      net stack entry/exit operations.
      
      Next patches will introduce mechanisms where protocols that want to
      optimize this operation will provide an unlocked_recvmsg operation.
      
      This takes into account comments made by:
      
      . Paul Moore: sock_recvmsg is called only for the first datagram,
        sock_recvmsg_nosec is used for the rest.
      
      . Caitlin Bestler: recvmmsg now has a struct timespec timeout, that
        works in the same fashion as the ppoll one.
      
        If the underlying protocol returns a datagram with MSG_OOB set, this
        will make recvmmsg return right away with as many datagrams (+ the OOB
        one) it has received so far.
      
      . Rémi Denis-Courmont & Steven Whitehouse: If we receive N < vlen
        datagrams and then recvmsg returns an error, recvmmsg will return
        the successfully received datagrams, store the error and return it
        in the next call.
      
      This paves the way for a subsequent optimization, sk_prot->unlocked_recvmsg,
      where we will be able to acquire the lock only at batch start and end, not at
      every underlying recvmsg call.
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      a2e27255
  10. 21 Sep, 2009 1 commit
    • Ingo Molnar's avatar
      perf: Do the big rename: Performance Counters -> Performance Events · cdd6c482
      Ingo Molnar authored
      Bye-bye Performance Counters, welcome Performance Events!
      
      In the past few months the perfcounters subsystem has grown out its
      initial role of counting hardware events, and has become (and is
      becoming) a much broader generic event enumeration, reporting, logging,
      monitoring, analysis facility.
      
      Naming its core object 'perf_counter' and naming the subsystem
      'perfcounters' has become more and more of a misnomer. With pending
      code like hw-breakpoints support the 'counter' name is less and
      less appropriate.
      
      All in one, we've decided to rename the subsystem to 'performance
      events' and to propagate this rename through all fields, variables
      and API names. (in an ABI compatible fashion)
      
      The word 'event' is also a bit shorter than 'counter' - which makes
      it slightly more convenient to write/handle as well.
      
      Thanks goes to Stephane Eranian who first observed this misnomer and
      suggested a rename.
      
      User-space tooling and ABI compatibility is not affected - this patch
      should be function-invariant. (Also, defconfigs were not touched to
      keep the size down.)
      
      This patch has been generated via the following script:
      
        FILES=$(find * -type f | grep -vE 'oprofile|[^K]config')
      
        sed -i \
          -e 's/PERF_EVENT_/PERF_RECORD_/g' \
          -e 's/PERF_COUNTER/PERF_EVENT/g' \
          -e 's/perf_counter/perf_event/g' \
          -e 's/nb_counters/nb_events/g' \
          -e 's/swcounter/swevent/g' \
          -e 's/tpcounter_event/tp_event/g' \
          $FILES
      
        for N in $(find . -name perf_counter.[ch]); do
          M=$(echo $N | sed 's/perf_counter/perf_event/g')
          mv $N $M
        done
      
        FILES=$(find . -name perf_event.*)
      
        sed -i \
          -e 's/COUNTER_MASK/REG_MASK/g' \
          -e 's/COUNTER/EVENT/g' \
          -e 's/\<event\>/event_id/g' \
          -e 's/counter/event/g' \
          -e 's/Counter/Event/g' \
          $FILES
      
      ... to keep it as correct as possible. This script can also be
      used by anyone who has pending perfcounters patches - it converts
      a Linux kernel tree over to the new naming. We tried to time this
      change to the point in time where the amount of pending patches
      is the smallest: the end of the merge window.
      
      Namespace clashes were fixed up in a preparatory patch - and some
      stylistic fallout will be fixed up in a subsequent patch.
      
      ( NOTE: 'counters' are still the proper terminology when we deal
        with hardware registers - and these sed scripts are a bit
        over-eager in renaming them. I've undone some of that, but
        in case there's something left where 'counter' would be
        better than 'event' we can undo that on an individual basis
        instead of touching an otherwise nicely automated patch. )
      Suggested-by: default avatarStephane Eranian <eranian@google.com>
      Acked-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
      Acked-by: default avatarPaul Mackerras <paulus@samba.org>
      Reviewed-by: default avatarArjan van de Ven <arjan@linux.intel.com>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: David Howells <dhowells@redhat.com>
      Cc: Kyle McMartin <kyle@mcmartin.ca>
      Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
      Cc: "David S. Miller" <davem@davemloft.net>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: <linux-arch@vger.kernel.org>
      LKML-Reference: <new-submission>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      cdd6c482
  11. 17 Sep, 2009 1 commit
  12. 03 Aug, 2009 1 commit
  13. 03 Jul, 2009 1 commit
  14. 02 Apr, 2009 1 commit
  15. 27 Feb, 2009 1 commit
  16. 14 Jan, 2009 1 commit
  17. 04 Dec, 2008 2 commits
  18. 27 Oct, 2008 2 commits
  19. 26 Aug, 2008 1 commit
  20. 20 Jul, 2008 1 commit
  21. 15 Jul, 2008 1 commit
  22. 19 Feb, 2008 1 commit
  23. 05 Feb, 2008 1 commit
    • Davide Libenzi's avatar
      timerfd: new timerfd API · 4d672e7a
      Davide Libenzi authored
      This is the new timerfd API as it is implemented by the following patch:
      
      int timerfd_create(int clockid, int flags);
      int timerfd_settime(int ufd, int flags,
      		    const struct itimerspec *utmr,
      		    struct itimerspec *otmr);
      int timerfd_gettime(int ufd, struct itimerspec *otmr);
      
      The timerfd_create() API creates an un-programmed timerfd fd.  The "clockid"
      parameter can be either CLOCK_MONOTONIC or CLOCK_REALTIME.
      
      The timerfd_settime() API give new settings by the timerfd fd, by optionally
      retrieving the previous expiration time (in case the "otmr" parameter is not
      NULL).
      
      The time value specified in "utmr" is absolute, if the TFD_TIMER_ABSTIME bit
      is set in the "flags" parameter.  Otherwise it's a relative time.
      
      The timerfd_gettime() API returns the next expiration time of the timer, or
      {0, 0} if the timerfd has not been set yet.
      
      Like the previous timerfd API implementation, read(2) and poll(2) are
      supported (with the same interface).  Here's a simple test program I used to
      exercise the new timerfd APIs:
      
      http://www.xmailserver.org/timerfd-test2.c
      
      [akpm@linux-foundation.org: coding-style cleanups]
      [akpm@linux-foundation.org: fix ia64 build]
      [akpm@linux-foundation.org: fix m68k build]
      [akpm@linux-foundation.org: fix mips build]
      [akpm@linux-foundation.org: fix alpha, arm, blackfin, cris, m68k, s390, sparc and sparc64 builds]
      [heiko.carstens@de.ibm.com: fix s390]
      [akpm@linux-foundation.org: fix powerpc build]
      [akpm@linux-foundation.org: fix sparc64 more]
      Signed-off-by: default avatarDavide Libenzi <davidel@xmailserver.org>
      Cc: Michael Kerrisk <mtk-manpages@gmx.net>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Davide Libenzi <davidel@xmailserver.org>
      Cc: Michael Kerrisk <mtk-manpages@gmx.net>
      Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
      Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
      Cc: Michael Kerrisk <mtk.manpages@gmail.com>
      Cc: Davide Libenzi <davidel@xmailserver.org>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      4d672e7a
  24. 31 Jul, 2007 1 commit
  25. 11 Jun, 2007 1 commit
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  27. 29 Nov, 2006 1 commit
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  31. 27 Sep, 2006 1 commit
  32. 13 Jul, 2006 2 commits
  33. 30 Jun, 2006 1 commit
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  35. 23 Jun, 2006 1 commit