[SCM] GNU Mach branch, master, updated. v1.6-34-g0b07275

[Richard Braun]

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- Log -----------------------------------------------------------------
commit 0b07275f60923840dffc80d7b4adb9a1ad7799f5
Author: Richard Braun <address@hidden>
Date:   Sat Feb 6 23:06:33 2016 +0100

    Change computation of slab size
    
    Allocating directly out of the physical memory allocator makes the slab
    allocator vulnerable to failures due to fragmentation. This change makes
    the slab allocator use the lowest possible size for its slabs to reduce
    the chance of contiguous allocation failures.
    
    * kern/slab.c (KMEM_MIN_BUFS_PER_SLAB, KMEM_SLAB_SIZE_THRESHOLD): Remove
    macros.
    (kmem_cache_compute_sizes): Update the algorithm used to determine slab
    size and other cache properties.

-----------------------------------------------------------------------

Summary of changes:
 kern/slab.c |   82 ++++++++++++++++++----------------------------------------
 1 files changed, 26 insertions(+), 56 deletions(-)


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