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  1. 12 1月, 2009 17 次提交
    • M
      irq: initialize nr_irqs based on nr_cpu_ids · 9332fccd
      由 Mike Travis 提交于 
      Impact: Reduce memory usage.

This is the second half of the changes to make the irq_desc_ptrs be
variable sized based on nr_cpu_ids.  This is done by adding a new
"max_nr_irqs" macro to irq_vectors.h (and a dummy in irqnr.h) to
return a max NR_IRQS value based on NR_CPUS or nr_cpu_ids.

This necessitated moving the define of MAX_IO_APICS to a separate
file (asm/apicnum.h) so it could be included without the baggage
of the other asm/apicdef.h declarations.
Signed-off-by: NMike Travis <travis@sgi.com>
      9332fccd
    • M
      irq: allocate irq_desc_ptrs array based on nr_irqs · 0fa0ebbf
      由 Mike Travis 提交于 
      Impact: allocate irq_desc_ptrs in preparation for making it variable-sized.

This addresses this memory usage bump when NR_CPUS bumped from 128 to 4096:

    34816   +229376    264192  +658%  irq_desc_ptrs(.data.read_mostly)

The patch is split into two parts, the first simply allocates the
irq_desc_ptrs array.  Then next will deal with making it variable.
This is only when CONFIG_SPARSE_IRQS=y.
Signed-off-by: NMike Travis <travis@sgi.com>
      0fa0ebbf
    • M
      irq: use WARN() instead of WARN_ON(). · e2f4d065
      由 Mike Travis 提交于 
      Impact: cleanup WARN msg.

Ingo requested:
> While at it, could you please also convert this to a WARN() construct
> instead? (in a separate commit)

... and it shall be done.  ;-)
Signed-off-by: NMike Travis <travis@sgi.com>
      e2f4d065
    • M
      irq: change references from NR_IRQS to nr_irqs · 9594949b
      由 Mike Travis 提交于 
      Impact: preparation, cleanup, add KERN_INFO printk

Modify references from NR_IRQS to nr_irqs as the later will become
variable-sized based on nr_cpu_ids when CONFIG_SPARSE_IRQS=y.
Signed-off-by: NMike Travis <travis@sgi.com>
      9594949b
    • M
      Xen: reduce memory required for cpu_evtchn_mask · c7a3589e
      由 Mike Travis 提交于 
      Impact: reduce memory usage.

Reduce this significant gain in the amount of memory used
when NR_CPUS bumped from 128 to 4096 by allocating the
array based on nr_cpu_ids:

    65536  +2031616   2097152 +3100%  cpu_evtchn_mask(.bss)
Signed-off-by: NMike Travis <travis@sgi.com>
Cc: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: Chris Wright <chrisw@sous-sol.org>
Cc: virtualization@lists.osdl.org
Cc: xen-devel@lists.xensource.com
      c7a3589e
    • M
      cpumask: reduce stack usage in find_lowest_rq · d38b223c
      由 Mike Travis 提交于 
      Impact: reduce stack usage, cleanup

Use a cpumask_var_t in find_lowest_rq() and clean up other old
cpumask_t calls.
Signed-off-by: NMike Travis <travis@sgi.com>
      d38b223c
    • M
      cpumask: use cpumask_var_t in dcdbas.c · c90e785b
      由 Mike Travis 提交于 
      Impact: reduce stack usage.

Replace cpumask_t with cpumask_var_t in drivers/firmware/dcdbas.c.
Signed-off-by: NMike Travis <travis@sgi.com>
      c90e785b
    • M
      x86: reduce stack usage in init_intel_cacheinfo · f9b90566
      由 Mike Travis 提交于 
      Impact: reduce stack usage.

init_intel_cacheinfo() does not use the cpumask so define a subset
of struct _cpuid4_info (_cpuid4_info_regs) that can be used instead.
Signed-off-by: NMike Travis <travis@sgi.com>
      f9b90566
    • M
      x86: cleanup remaining cpumask_t code in mce_amd_64.c · a1c33bbe
      由 Mike Travis 提交于 
      Impact: Reduce memory usage, use new cpumask API.

Use cpumask_var_t for 'cpus' cpumask in struct threshold_bank and update
remaining old cpumask_t functions to new cpumask API.
Signed-off-by: NMike Travis <travis@sgi.com>
      a1c33bbe
    • M
      SGI UV cpumask: use static temp cpumask in flush_tlb · 0e21990a
      由 Mike Travis 提交于 
      Impact: Improve tlb flush performance for UV

Calling alloc_cpumask_var a zillion times a second does affect
performance.  Replace with static cpumask.

Note: when CONFIG_X86_UV is defined, this extra PER_CPU memory
will be optimized out for non-UV configs as is_uv_system() will
then return a constant 0.
Signed-off-by: NMike Travis <travis@sgi.com>
      0e21990a
    • R
      x86: change flush_tlb_others to take a const struct cpumask · 4595f962
      由 Rusty Russell 提交于 
      Impact: reduce stack usage, use new cpumask API.

This is made a little more tricky by uv_flush_tlb_others which
actually alters its argument, for an IPI to be sent to the remaining
cpus in the mask.

I solve this by allocating a cpumask_var_t for this case and falling back
to IPI should this fail.

To eliminate temporaries in the caller, all flush_tlb_others implementations
now do the this-cpu-elimination step themselves.

Note also the curious "cpus_or(f->flush_cpumask, cpumask, f->flush_cpumask)"
which has been there since pre-git and yet f->flush_cpumask is always zero
at this point.
Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
Signed-off-by: NMike Travis <travis@sgi.com>
      4595f962
    • M
      cpumask: fix bug in use cpumask_var_t in irq_desc · 802bf931
      由 Mike Travis 提交于 
      Impact: fix bug where new irq_desc uses old cpumask pointers which are freed.

As Yinghai pointed out, init_copy_one_irq_desc() copies the old desc to
the new desc overwriting the cpumask pointers.  Since the old_desc and
the cpumask pointers are freed, then memory corruption will occur if
these old pointers are used.

Move the allocation of these pointers to after the copy.
Signed-off-by: NMike Travis <travis@sgi.com>
Cc: Yinghai Lu <yinghai@kernel.org>
      802bf931
    • R
      cpumask: convert other misc kernel functions · 651f8118
      由 Rusty Russell 提交于 
      Impact: use new cpumask API.

Convert other misc kernel functions to use struct cpumask.
Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
Signed-off-by: NMike Travis <travis@sgi.com>
      651f8118
    • R
      cpumask: convert drivers/net/sfc · 2f8975fb
      由 Rusty Russell 提交于 
      Impact: reduce stack usage, use new cpumask API.

Remove a cpumask from the stack.  Ben Hutchings indicated that printing
a warning and returning 1 was acceptable for the corner case where allocation
fails.
Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
Signed-off-by: NMike Travis <travis@sgi.com>
Cc: Ben Hutchings <bhutchings@solarflare.com>
Cc: linux-net-drivers@solarflare.com
      2f8975fb
    • R
      cpumask: convert misc driver functions · f7df8ed1
      由 Rusty Russell 提交于 
      Impact: use new cpumask API.

Convert misc driver functions to use struct cpumask.

To Do:
  - Convert iucv_buffer_cpumask to cpumask_var_t.
Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
Signed-off-by: NMike Travis <travis@sgi.com>
Acked-by: NDean Nelson <dcn@sgi.com>
Cc: Robert Richter <robert.richter@amd.com>
Cc: oprofile-list@lists.sf.net
Cc: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: Chris Wright <chrisw@sous-sol.org>
Cc: virtualization@lists.osdl.org
Cc: xen-devel@lists.xensource.com
Cc: Ursula Braun <ursula.braun@de.ibm.com>
Cc: linux390@de.ibm.com
Cc: linux-s390@vger.kernel.org
      f7df8ed1
    • R
      cpumask: Use topology_core_cpumask()/topology_thread_cpumask() · fbd59a8d
      由 Rusty Russell 提交于 
      Impact: reduce stack usage, use new cpumask API.

This actually uses topology_core_cpumask() and
topology_thread_cpumask(), removing the only users of
topology_core_siblings() and topology_thread_siblings()
Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
Signed-off-by: NMike Travis <travis@sgi.com>
Cc: linux-net-drivers@solarflare.com
      fbd59a8d
    • M
      cpumask: update irq_desc to use cpumask_var_t · 7f7ace0c
      由 Mike Travis 提交于 
      Impact: reduce memory usage, use new cpumask API.

Replace the affinity and pending_masks with cpumask_var_t's.  This adds
to the significant size reduction done with the SPARSE_IRQS changes.

The added functions (init_alloc_desc_masks & init_copy_desc_masks) are
in the include file so they can be inlined (and optimized out for the
!CONFIG_CPUMASKS_OFFSTACK case.)  [Naming chosen to be consistent with
the other init*irq functions, as well as the backwards arg declaration
of "from, to" instead of the more common "to, from" standard.]

Includes a slight change to the declaration of struct irq_desc to embed
the pending_mask within ifdef(CONFIG_SMP) to be consistent with other
references, and some small changes to Xen.

Tested: sparse/non-sparse/cpumask_offstack/non-cpumask_offstack/nonuma/nosmp on x86_64
Signed-off-by: NMike Travis <travis@sgi.com>
Cc: Chris Wright <chrisw@sous-sol.org>
Cc: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Cc: virtualization@lists.osdl.org
Cc: xen-devel@lists.xensource.com
Cc: Yinghai Lu <yhlu.kernel@gmail.com>
      7f7ace0c
  3. 11 1月, 2009 4 次提交
  5. 10 1月, 2009 19 次提交