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  1. 03 5月, 2019 2 次提交
    • W
      MAINTAINERS: friendly takeover of i2c-gpio driver · fb31fbef
      由 Wolfram Sang 提交于 
      I haven't heard from Haavard in years despite putting him to the CC list for
i2c-gpio related mails. Since I was doing the work on this driver for a while
now, let me take official maintainership, so it will be more clear to users.
Signed-off-by: NWolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: NHaavard Skinnemoen <hskinnemoen@gmail.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>
      fb31fbef
    • K
      MAINTAINERS: Include vendor specific files under arch/*/events/* · 1804569d
      由 Kim Phillips 提交于 
      Add an explicit subdirectory specification for arch/x86/events/amd to
the MAINTAINERS file, to distinguish it from its parent. This will
produce the correct set of maintainers for the files found therein.
Signed-off-by: NKim Phillips <kim.phillips@amd.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Gary Hook <Gary.Hook@amd.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Janakarajan Natarajan <Janakarajan.Natarajan@amd.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Martin Liška <mliska@suse.cz>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Pu Wen <puwen@hygon.cn>
Cc: Stephane Eranian <eranian@google.com>
Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Thomas Lendacky <Thomas.Lendacky@amd.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-kernel@vger.kernel.org
Fixes: 39b0332a ("perf/x86: Move perf_event_amd.c ........... => x86/events/amd/core.c")
Signed-off-by: NIngo Molnar <mingo@kernel.org>
      1804569d
  3. 26 4月, 2019 1 次提交
  5. 25 4月, 2019 1 次提交
  7. 16 4月, 2019 2 次提交
  9. 12 4月, 2019 1 次提交
  11. 11 4月, 2019 1 次提交
  13. 10 4月, 2019 1 次提交
  15. 09 4月, 2019 1 次提交
  17. 08 4月, 2019 1 次提交
  19. 06 4月, 2019 2 次提交
  21. 03 4月, 2019 2 次提交
    • W
      locking/rwsem: Remove arch specific rwsem files · 46ad0840
      由 Waiman Long 提交于 
      As the generic rwsem-xadd code is using the appropriate acquire and
release versions of the atomic operations, the arch specific rwsem.h
files will not be that much faster than the generic code as long as the
atomic functions are properly implemented. So we can remove those arch
specific rwsem.h and stop building asm/rwsem.h to reduce maintenance
effort.

Currently, only x86, alpha and ia64 have implemented architecture
specific fast paths. I don't have access to alpha and ia64 systems for
testing, but they are legacy systems that are not likely to be updated
to the latest kernel anyway.

By using a rwsem microbenchmark, the total locking rates on a 4-socket
56-core 112-thread x86-64 system before and after the patch were as
follows (mixed means equal # of read and write locks):

                      Before Patch              After Patch
   # of Threads  wlock   rlock   mixed     wlock   rlock   mixed
   ------------  -----   -----   -----     -----   -----   -----
        1        29,201  30,143  29,458    28,615  30,172  29,201
        2         6,807  13,299   1,171     7,725  15,025   1,804
        4         6,504  12,755   1,520     7,127  14,286   1,345
        8         6,762  13,412     764     6,826  13,652     726
       16         6,693  15,408     662     6,599  15,938     626
       32         6,145  15,286     496     5,549  15,487     511
       64         5,812  15,495      60     5,858  15,572      60

There were some run-to-run variations for the multi-thread tests. For
x86-64, using the generic C code fast path seems to be a little bit
faster than the assembly version with low lock contention.  Looking at
the assembly version of the fast paths, there are assembly to/from C
code wrappers that save and restore all the callee-clobbered registers
(7 registers on x86-64). The assembly generated from the generic C
code doesn't need to do that. That may explain the slight performance
gain here.

The generic asm rwsem.h can also be merged into kernel/locking/rwsem.h
with no code change as no other code other than those under
kernel/locking needs to access the internal rwsem macros and functions.
Signed-off-by: NWaiman Long <longman@redhat.com>
Signed-off-by: NPeter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: NLinus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-c6x-dev@linux-c6x.org
Cc: linux-m68k@lists.linux-m68k.org
Cc: linux-riscv@lists.infradead.org
Cc: linux-um@lists.infradead.org
Cc: linux-xtensa@linux-xtensa.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: nios2-dev@lists.rocketboards.org
Cc: openrisc@lists.librecores.org
Cc: uclinux-h8-devel@lists.sourceforge.jp
Link: https://lkml.kernel.org/r/20190322143008.21313-2-longman@redhat.comSigned-off-by: NIngo Molnar <mingo@kernel.org>
      46ad0840
    • N
      Update Nicolas Pitre's email address · 9f3bd8fe
      由 Nicolas Pitre 提交于 
      The @linaro version won't be valid much longer.
Signed-off-by: NNicolas Pitre <nico@fluxnic.net>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      9f3bd8fe
  23. 02 4月, 2019 1 次提交
  25. 28 3月, 2019 2 次提交
  27. 27 3月, 2019 2 次提交
  29. 26 3月, 2019 4 次提交
  31. 19 3月, 2019 1 次提交
  33. 16 3月, 2019 1 次提交
  35. 14 3月, 2019 1 次提交
  37. 10 3月, 2019 1 次提交
  39. 08 3月, 2019 2 次提交
  41. 07 3月, 2019 1 次提交
  43. 06 3月, 2019 1 次提交
  45. 28 2月, 2019 2 次提交
  47. 26 2月, 2019 1 次提交
  49. 25 2月, 2019 2 次提交
  51. 23 2月, 2019 3 次提交