lkml.org 
[lkml]   [2011]   [Nov]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    Date
    From
    Subject[PATCH] x86-64: reduce amount of redundant code generated for invalidate_interruptNN
    Previously these up to 32 entry points, consisting of all the same code
    except for their very first instruction, consumed 0x70 bytes per
    instance. Just like for device interrupt entry points, fold them
    together so that they all use a single instance of the code after having
    pushed their vector indicator (resulting in 0x10 bytes per instance, to
    retain 16-byte alignment of the individual entry points).

    Signed-off-by: Jan Beulich <jbeulich@suse.com>

    ---
    arch/x86/kernel/entry_64.S | 15 ++++++++++++---
    1 file changed, 12 insertions(+), 3 deletions(-)

    --- 3.2-rc3/arch/x86/kernel/entry_64.S
    +++ 3.2-rc3-x86_64-entry-invalidate-intr/arch/x86/kernel/entry_64.S
    @@ -953,6 +953,7 @@ END(common_interrupt)
    ENTRY(\sym)
    INTR_FRAME
    pushq_cfi $~(\num)
    +.Lcommon_\sym:
    interrupt \do_sym
    jmp ret_from_intr
    CFI_ENDPROC
    @@ -976,13 +977,21 @@ apicinterrupt X86_PLATFORM_IPI_VECTOR \
    x86_platform_ipi smp_x86_platform_ipi

    #ifdef CONFIG_SMP
    -.irp idx,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15, \
    + ALIGN
    + INTR_FRAME
    +.irp idx,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15, \
    16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31
    .if NUM_INVALIDATE_TLB_VECTORS > \idx
    -apicinterrupt (INVALIDATE_TLB_VECTOR_START)+\idx \
    - invalidate_interrupt\idx smp_invalidate_interrupt
    +ENTRY(invalidate_interrupt\idx)
    + pushq_cfi $~(INVALIDATE_TLB_VECTOR_START+\idx)
    + jmp .Lcommon_invalidate_interrupt0
    + CFI_ADJUST_CFA_OFFSET -8
    +END(invalidate_interrupt\idx)
    .endif
    .endr
    + CFI_ENDPROC
    +apicinterrupt INVALIDATE_TLB_VECTOR_START, \
    + invalidate_interrupt0, smp_invalidate_interrupt
    #endif

    apicinterrupt THRESHOLD_APIC_VECTOR \




    \
     
     \ /
      Last update: 2011-11-29 12:05    [W:0.031 / U:0.080 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site