[SCM] GNU Mach branch, master, updated. v1.8-721-gbefadb5a

[Samuel Thibault]

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commit befadb5a31a013a95802478d45707f49043a773c
Author: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date:   Mon Aug 14 22:08:10 2023 +0200

    pmap+slab: Add more smoketests
    
    Checking the range of addresses for operations on the kernel_pmap is
    quite cheap, and allows to catch oddities quite early enough.

commit 160f9286fd8b6e358244e2642c3068c9484d82d0
Author: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date:   Mon Aug 14 22:05:39 2023 +0200

    pmap: Fix mayhem when releasing near the end of virtual memory
    
    l is used to skip over the area mapped by a whole pde. It was clipped to
    e, but if e is already near the end of virtual memory, l will
    wrap-around to 0, and mayhem entails.

commit 0c33f0461f466754b47797f6f860c70520a8ccbb
Author: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date:   Mon Aug 14 16:43:52 2023 +0200

    pmap: Add MAPWINDOW_SIZE macro

commit 5de6c7117d078528e506c7a7030ad6d6005111bd
Author: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date:   Mon Aug 14 16:22:27 2023 +0200

    pmap: reserve last virtual page
    
    So as to catch trying to dereference -1

commit 399e0622ed0dc30a8803a0fcf2dcdb66a509e891
Author: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date:   Mon Aug 14 16:21:52 2023 +0200

    pmap: Add more debugging information when getting a null pv_list

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

Summary of changes:
 i386/intel/pmap.c | 27 ++++++++++++++++-----------
 kern/slab.c       |  3 +++
 2 files changed, 19 insertions(+), 11 deletions(-)


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