[SCM] GNU Mach branch, master, updated. v1.6-33-g44d7806

[Richard Braun]

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- Log -----------------------------------------------------------------
commit 44d78061e90e777b51cae8e01eda5c0d3ce63103
Author: Richard Braun <address@hidden>
Date:   Tue Feb 2 23:17:20 2016 +0100

    Fix various memory managment errors
    
    A few errors were introduced in the latest changes.
    
    o Add VM_PAGE_WAIT calls around physical allocation attempts in case of
    memory exhaustion.
    o Fix stack release.
    o Fix memory exhaustion report.
    o Fix free page accounting.
    
    * kern/slab.c (kmem_pagealloc, kmem_pagefree): New functions
    (kmem_slab_create, kmem_slab_destroy, kalloc, kfree): Use kmem_pagealloc
    and kmem_pagefree instead of the raw page allocation functions.
    (kmem_cache_compute_sizes): Don't store slab order.
    * kern/slab.h (struct kmem_cache): Remove `slab_order' member.
    * kern/thread.c (stack_alloc): Call VM_PAGE_WAIT in case of memory
    exhaustion.
    (stack_collect): Call vm_page_free_contig instead of kmem_free to
    release pages.
    * vm/vm_page.c (vm_page_seg_alloc): Fix memory exhaustion report.
    (vm_page_setup): Don't update vm_page_free_count.
    (vm_page_free_pa): Check page parameter.
    (vm_page_mem_free): New function.
    * vm/vm_page.h (vm_page_free_count): Remove extern declaration.
    (vm_page_mem_free): New prototype.
    * vm/vm_pageout.c: Update comments not to refer to vm_page_free_count.
    (vm_pageout_scan, vm_pageout_continue, vm_pageout): Use vm_page_mem_free
    instead of vm_page_free_count, update types accordingly.
    * vm/vm_resident.c (vm_page_free_count, vm_page_free_count_minimum):
    Remove variables.
    (vm_page_free_avail): New variable.
    (vm_page_bootstrap, vm_page_grab, vm_page_release, vm_page_grab_contig,
    vm_page_free_contig, vm_page_wait): Use vm_page_mem_free instead of 
vm_page_free_count,
    update types accordingly, don't set vm_page_free_count_minimum.
    * vm/vm_user.c (vm_statistics): Likewise.

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

Summary of changes:
 kern/slab.c      |   39 +++++++++++++++++++++++++++------------
 kern/slab.h      |    1 -
 kern/thread.c    |   28 +++++++++++++++++-----------
 vm/vm_page.c     |   27 +++++++++++++++++++++++----
 vm/vm_page.h     |   14 ++++++++++++--
 vm/vm_pageout.c  |   20 ++++++++++----------
 vm/vm_resident.c |   45 +++++++++++++++++++--------------------------
 vm/vm_user.c     |    2 +-
 8 files changed, 109 insertions(+), 67 deletions(-)


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