1. 17 5月, 2010 1 次提交
  2. 25 4月, 2010 4 次提交
  3. 30 3月, 2010 1 次提交
    • T
      include cleanup: Update gfp.h and slab.h includes to prepare for breaking... · 5a0e3ad6
      Tejun Heo 提交于
      include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
      
      percpu.h is included by sched.h and module.h and thus ends up being
      included when building most .c files.  percpu.h includes slab.h which
      in turn includes gfp.h making everything defined by the two files
      universally available and complicating inclusion dependencies.
      
      percpu.h -> slab.h dependency is about to be removed.  Prepare for
      this change by updating users of gfp and slab facilities include those
      headers directly instead of assuming availability.  As this conversion
      needs to touch large number of source files, the following script is
      used as the basis of conversion.
      
        http://userweb.kernel.org/~tj/misc/slabh-sweep.py
      
      The script does the followings.
      
      * Scan files for gfp and slab usages and update includes such that
        only the necessary includes are there.  ie. if only gfp is used,
        gfp.h, if slab is used, slab.h.
      
      * When the script inserts a new include, it looks at the include
        blocks and try to put the new include such that its order conforms
        to its surrounding.  It's put in the include block which contains
        core kernel includes, in the same order that the rest are ordered -
        alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
        doesn't seem to be any matching order.
      
      * If the script can't find a place to put a new include (mostly
        because the file doesn't have fitting include block), it prints out
        an error message indicating which .h file needs to be added to the
        file.
      
      The conversion was done in the following steps.
      
      1. The initial automatic conversion of all .c files updated slightly
         over 4000 files, deleting around 700 includes and adding ~480 gfp.h
         and ~3000 slab.h inclusions.  The script emitted errors for ~400
         files.
      
      2. Each error was manually checked.  Some didn't need the inclusion,
         some needed manual addition while adding it to implementation .h or
         embedding .c file was more appropriate for others.  This step added
         inclusions to around 150 files.
      
      3. The script was run again and the output was compared to the edits
         from #2 to make sure no file was left behind.
      
      4. Several build tests were done and a couple of problems were fixed.
         e.g. lib/decompress_*.c used malloc/free() wrappers around slab
         APIs requiring slab.h to be added manually.
      
      5. The script was run on all .h files but without automatically
         editing them as sprinkling gfp.h and slab.h inclusions around .h
         files could easily lead to inclusion dependency hell.  Most gfp.h
         inclusion directives were ignored as stuff from gfp.h was usually
         wildly available and often used in preprocessor macros.  Each
         slab.h inclusion directive was examined and added manually as
         necessary.
      
      6. percpu.h was updated not to include slab.h.
      
      7. Build test were done on the following configurations and failures
         were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
         distributed build env didn't work with gcov compiles) and a few
         more options had to be turned off depending on archs to make things
         build (like ipr on powerpc/64 which failed due to missing writeq).
      
         * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
         * powerpc and powerpc64 SMP allmodconfig
         * sparc and sparc64 SMP allmodconfig
         * ia64 SMP allmodconfig
         * s390 SMP allmodconfig
         * alpha SMP allmodconfig
         * um on x86_64 SMP allmodconfig
      
      8. percpu.h modifications were reverted so that it could be applied as
         a separate patch and serve as bisection point.
      
      Given the fact that I had only a couple of failures from tests on step
      6, I'm fairly confident about the coverage of this conversion patch.
      If there is a breakage, it's likely to be something in one of the arch
      headers which should be easily discoverable easily on most builds of
      the specific arch.
      Signed-off-by: NTejun Heo <tj@kernel.org>
      Guess-its-ok-by: NChristoph Lameter <cl@linux-foundation.org>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
      5a0e3ad6
  4. 01 3月, 2010 3 次提交
  5. 08 12月, 2009 1 次提交
  6. 03 12月, 2009 2 次提交
    • A
      KVM: Activate Virtualization On Demand · 10474ae8
      Alexander Graf 提交于
      X86 CPUs need to have some magic happening to enable the virtualization
      extensions on them. This magic can result in unpleasant results for
      users, like blocking other VMMs from working (vmx) or using invalid TLB
      entries (svm).
      
      Currently KVM activates virtualization when the respective kernel module
      is loaded. This blocks us from autoloading KVM modules without breaking
      other VMMs.
      
      To circumvent this problem at least a bit, this patch introduces on
      demand activation of virtualization. This means, that instead
      virtualization is enabled on creation of the first virtual machine
      and disabled on destruction of the last one.
      
      So using this, KVM can be easily autoloaded, while keeping other
      hypervisors usable.
      Signed-off-by: NAlexander Graf <agraf@suse.de>
      Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
      Signed-off-by: NAvi Kivity <avi@redhat.com>
      10474ae8
    • A
      KVM: Return -ENOTTY on unrecognized ioctls · 367e1319
      Avi Kivity 提交于
      Not the incorrect -EINVAL.
      Signed-off-by: NAvi Kivity <avi@redhat.com>
      367e1319
  7. 05 11月, 2009 2 次提交
  8. 10 9月, 2009 3 次提交
  9. 10 6月, 2009 1 次提交
  10. 24 3月, 2009 3 次提交
  11. 15 2月, 2009 1 次提交
  12. 31 12月, 2008 5 次提交
  13. 23 12月, 2008 1 次提交
  14. 21 12月, 2008 1 次提交
    • B
      powerpc/mm: Split low level tlb invalidate for nohash processors · 2a4aca11
      Benjamin Herrenschmidt 提交于
      Currently, the various forms of low level TLB invalidations are all
      implemented in misc_32.S for 32-bit processors, in a fairly scary
      mess of #ifdef's and with interesting duplication such as a whole
      bunch of code for FSL _tlbie and _tlbia which are no longer used.
      
      This moves things around such that _tlbie is now defined in
      hash_low_32.S and is only used by the 32-bit hash code, and all
      nohash CPUs use the various _tlbil_* forms that are now moved to
      a new file, tlb_nohash_low.S.
      
      I moved all the definitions for that stuff out of
      include/asm/tlbflush.h as they are really internal mm stuff, into
      mm/mmu_decl.h
      
      The code should have no functional changes.  I kept some variants
      inline for trivial forms on things like 40x and 8xx.
      Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
      Acked-by: NKumar Gala <galak@kernel.crashing.org>
      Signed-off-by: NPaul Mackerras <paulus@samba.org>
      2a4aca11
  15. 25 11月, 2008 1 次提交
  16. 15 10月, 2008 2 次提交
  17. 20 7月, 2008 3 次提交
  18. 04 5月, 2008 1 次提交
  19. 27 4月, 2008 1 次提交