• Anton Blanchard's avatar
    [POWERPC] Enable SLUB in *_defconfig · 309a1092
    Anton Blanchard authored
    When checking out the new NO_HZ support in powerpc, I noticed we never
    slept for more than 2 seconds.  It turns out SLAB has a 2 second per cpu
    timer that causes this.
    
    After switching to SLUB I see some nice 4 second sleeps which is the
    limit on this POWER6 box (the decrementer ticks at 512MHz):
    
    slept 4.19 sec
    slept 4.19 sec
    slept 4.19 sec
    slept 4.19 sec
    slept 3.96 sec
    slept 3.80 sec
    slept 2.99 sec
    
    Since SLUB is now the default and some powerpc defconfigs already enable
    it, lets enable SLUB across the board for consistency.  While doing this
    I also noticed that the maple defconfig has SLAB debugging enabled which
    is sure to make your box nice and slow.  Fix that too.
    Signed-off-by: default avatarAnton Blanchard <anton@samba.org>
    Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
    309a1092
iseries_defconfig 25.6 KB