1. 17 4月, 2008 7 次提交
  2. 13 3月, 2008 1 次提交
  3. 12 3月, 2008 1 次提交
    • T
      x86: remove quicklists · 985a34bd
      Thomas Gleixner 提交于
      quicklists cause a serious memory leak on 32-bit x86,
      as documented at:
      
        http://bugzilla.kernel.org/show_bug.cgi?id=9991
      
      the reason is that the quicklist pool is a special-purpose
      cache that grows out of proportion. It is not accounted for
      anywhere and users have no way to even realize that it's
      the quicklists that are causing RAM usage spikes. It was
      supposed to be a relatively small pool, but as demonstrated
      by KOSAKI Motohiro, they can grow as large as:
      
        Quicklists:    1194304 kB
      
      given how much trouble this code has caused historically,
      and given that Andrew objected to its introduction on x86
      (years ago), the best option at this point is to remove them.
      
      [ any performance benefits of caching constructed pgds should
        be implemented in a more generic way (possibly within the page
        allocator), while still allowing constructed pages to be
        allocated by other workloads. ]
      Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      985a34bd
  4. 05 3月, 2008 1 次提交
  5. 04 3月, 2008 1 次提交
  6. 23 2月, 2008 1 次提交
  7. 15 2月, 2008 1 次提交
  8. 09 2月, 2008 3 次提交
  9. 08 2月, 2008 2 次提交
    • C
      SLUB: Alternate fast paths using cmpxchg_local · 1f84260c
      Christoph Lameter 提交于
      Provide an alternate implementation of the SLUB fast paths for alloc
      and free using cmpxchg_local. The cmpxchg_local fast path is selected
      for arches that have CONFIG_FAST_CMPXCHG_LOCAL set. An arch should only
      set CONFIG_FAST_CMPXCHG_LOCAL if the cmpxchg_local is faster than an
      interrupt enable/disable sequence. This is known to be true for both
      x86 platforms so set FAST_CMPXCHG_LOCAL for both arches.
      
      Currently another requirement for the fastpath is that the kernel is
      compiled without preemption. The restriction will go away with the
      introduction of a new per cpu allocator and new per cpu operations.
      
      The advantages of a cmpxchg_local based fast path are:
      
      1. Potentially lower cycle count (30%-60% faster)
      
      2. There is no need to disable and enable interrupts on the fast path.
         Currently interrupts have to be disabled and enabled on every
         slab operation. This is likely avoiding a significant percentage
         of interrupt off / on sequences in the kernel.
      
      3. The disposal of freed slabs can occur with interrupts enabled.
      
      The alternate path is realized using #ifdef's. Several attempts to do the
      same with macros and inline functions resulted in a mess (in particular due
      to the strange way that local_interrupt_save() handles its argument and due
      to the need to define macros/functions that sometimes disable interrupts
      and sometimes do something else).
      
      [clameter: Stripped preempt bits and disabled fastpath if preempt is enabled]
      Signed-off-by: NChristoph Lameter <clameter@sgi.com>
      Reviewed-by: NPekka Enberg <penberg@cs.helsinki.fi>
      Cc: <linux-arch@vger.kernel.org>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      1f84260c
    • B
      I8K: add i8k driver to the x86_64 Kconfig · 300ec130
      Bradley Smith 提交于
      Adds i8k driver to the x86_64 Kconfig.
      Signed-off-by: NBradley Smith <bradjsmith@btinternet.com>
      Cc: Frank Sorenson <frank@tuxrocks.com>
      Cc: Jeff Garzik <jeff@garzik.org>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      300ec130
  10. 07 2月, 2008 3 次提交
  11. 06 2月, 2008 2 次提交
  12. 04 2月, 2008 1 次提交
  13. 03 2月, 2008 4 次提交
    • A
      remove Documentation/smp.txt · 03502faa
      Adrian Bunk 提交于
      After seeing the filename I'd have expected something about the
      implementation of SMP in the Linux kernel - not some notes on kernel
      configuration and building trivialities noone would search at this
      place.
      Signed-off-by: NAdrian Bunk <bunk@kernel.org>
      Acked-by: NAlan Cox <alan@redhat.com>
      03502faa
    • M
      Move Kconfig.instrumentation to arch/Kconfig and init/Kconfig · 125e5645
      Mathieu Desnoyers 提交于
      Move the instrumentation Kconfig to
      
      arch/Kconfig for architecture dependent options
        - oprofile
        - kprobes
      
      and
      
      init/Kconfig for architecture independent options
        - profiling
        - markers
      
      Remove the "Instrumentation Support" menu. Everything moves to "General setup".
      Delete the kernel/Kconfig.instrumentation file.
      Signed-off-by: NMathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: <linux-arch@vger.kernel.org>
      Signed-off-by: NSam Ravnborg <sam@ravnborg.org>
      125e5645
    • M
      Add HAVE_KPROBES · 3f550096
      Mathieu Desnoyers 提交于
      Linus:
      
      On the per-architecture side, I do think it would be better to *not* have
      internal architecture knowledge in a generic file, and as such a line like
      
              depends on X86_32 || IA64 || PPC || S390 || SPARC64 || X86_64 || AVR32
      
      really shouldn't exist in a file like kernel/Kconfig.instrumentation.
      
      It would be much better to do
      
              depends on ARCH_SUPPORTS_KPROBES
      
      in that generic file, and then architectures that do support it would just
      have a
      
              bool ARCH_SUPPORTS_KPROBES
                      default y
      
      in *their* architecture files. That would seem to be much more logical,
      and is readable both for arch maintainers *and* for people who have no
      clue - and don't care - about which architecture is supposed to support
      which interface...
      
      Changelog:
      
      Actually, I know I gave this as the magic incantation, but now that I see
      it, I realize that I should have told you to just use
      
              config KPROBES_SUPPORT
                      def_bool y
      
      instead, which is a bit denser.
      
      We seem to use both kinds of syntax for these things, but this is really
      what "def_bool" is there for...
      
      - Use HAVE_KPROBES
      - Use a select
      
      - Yet another update :
      Moving to HAVE_* now.
      
      - Update ARM for kprobes support.
      Signed-off-by: NMathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
      Cc: Jeff Dike <jdike@addtoit.com>
      Cc: David Howells <dhowells@redhat.com>
      Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
      Signed-off-by: NSam Ravnborg <sam@ravnborg.org>
      3f550096
    • M
      Add HAVE_OPROFILE · 42d4b839
      Mathieu Desnoyers 提交于
      Linus:
      On the per-architecture side, I do think it would be better to *not* have
      internal architecture knowledge in a generic file, and as such a line like
      
              depends on X86_32 || IA64 || PPC || S390 || SPARC64 || X86_64 || AVR32
      
      really shouldn't exist in a file like kernel/Kconfig.instrumentation.
      
      It would be much better to do
      
              depends on ARCH_SUPPORTS_KPROBES
      
      in that generic file, and then architectures that do support it would just
      have a
      
              bool ARCH_SUPPORTS_KPROBES
                      default y
      
      in *their* architecture files. That would seem to be much more logical,
      and is readable both for arch maintainers *and* for people who have no
      clue - and don't care - about which architecture is supposed to support
      which interface...
      
      Changelog:
      
      Actually, I know I gave this as the magic incantation, but now that I see
      it, I realize that I should have told you to just use
      
              config ARCH_SUPPORTS_KPROBES
                      def_bool y
      
      instead, which is a bit denser.
      
      We seem to use both kinds of syntax for these things, but this is really
      what "def_bool" is there for...
      
      Changelog :
      
      - Moving to HAVE_*.
      - Add AVR32 oprofile.
      Signed-off-by: NMathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
      Cc: David Howells <dhowells@redhat.com>
      Cc: Jeff Dike <jdike@addtoit.com>
      Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
      Signed-off-by: NSam Ravnborg <sam@ravnborg.org>
      42d4b839
  14. 02 2月, 2008 4 次提交
  15. 01 2月, 2008 1 次提交
  16. 31 1月, 2008 1 次提交
  17. 30 1月, 2008 6 次提交