GitLab

  + cleanup init.c and split into pgtable.c
  + split declaration of _text, _etext outside into sections.h

The remaining cleanups are to switch to using pfn instead of vaddr, and
improve readability.

This revised patch starts untangling the mess in arch/i386/mm/init.c
- Pull setting bits in cr4 out of the loop
- Make __PAGE_KERNEL a variable and cache the global bit there.
- New pfn_pmd() for large pages.

With all work done by akpm in 2.5 Linus no more has a buffer cache
in the traditional sense.  Still we try to keep estimates about
what would be the buffer cache size by keeping the number of pages
indexed by block device inodes.  This is broken not only because the
old buffercache was also used for file data which is nowdays not
hashed to block device inodes and thus makes every user of this data
assume wrong numbers.  Second is is possible to use block device
pages not through the buffer_head interface (i.e. userspace
block device nodes, possibly JFS also soon).  In addition the atomic_t
used for this bookkepping (buffermem_pages) causes cacheline bouncing
on larger machines.

This is the first patch of a series to get rid of it.  It removes the
useless output of supposedly buffer pages in show_mem(), which is used
by the magic sysrq key code.

Si_meminfo() is basically the same for all architectures (mips is a little
different by providing a value for the shared field that is different from
the originial intent, I will come back to this later), so it makes to have just
one instance of it:

Here is the patch to replace mk_pte_phys() with pfn_pte() and so creates
the counterpart to pte_pfn().

Remove show_buffers().  It really has nothing to show any more.  just
buffermem_pages() - move that out into the callers.

There's a lot of duplication in this code.  better approach would be to
remove all the duplicated code out in the architectures and implement
generic show_memory_state().  Later.

asm/pgtable.h and/or asm/pgalloc.h to asm/cacheflush.h, and
tlb flushing routines to asm/tlbflush.h.

This moves the dmi scan to an earlier stage so that we can trap issues
such as the various laptops that don't like enabling APIC.
It's likely to be useful for trapping other similar early-boot problems.
Originally by Mikael Pettersson

adds simple support for atomically-mapped PTEs. On highmem systems this enables the allocation of the pagetables in highmem.

- Greg KH: USB update
- Richard Gooch: refcounting for devfs
- Jens Axboe: start of new block IO layer

  - Alan Cox: more driver merging
  - Al Viro: make ext2 group allocation more readable

  - Manfred Spraul: /proc/pid/maps cleanup (and bugfix for non-x86)
  - Al Viro: "block device fs" - cleanup of page cache handling
  - Hugh Dickins: VM/shmem cleanups and swap search speedup
  - David Miller: sparc updates, soc driver typo fix, net updates
  - Jeff Garzik: network driver updates (dl2k, yellowfin and tulip)
  - Neil Brown: knfsd cleanups and fixues
  - Ben LaHaise: zap_page_range merge from -ac

  - Chris Mason: daemonize reiserfs commit thread
  - Alan Cox: syncup (AFFS might even work, and official VIA workarounds)
  - Jeff Garzik: network driver updates
  - Paul Mackerras: PPP update
  - David Howells: more rw-sem cleanups, updates. Slowly getting somewhere.

  - Kai Germaschewski: Makefile dependency fixes. ISDN update
  - Chris Mason: another reiserfs tail writing fix
  - unify pte/pmd allocation
  - undo some VIA PCI fixups - conflicting behaviour

  - Paul Mackerras: PPC update for thread-safe page table handling
  - Ingo Molnar: x86 PAE update for thread-safe page table handling
  - Jeff Garzik: network driver updates, i810 rng driver, and
  "alloc_etherdev()" network driver insert race condition fix.
  - David Miller: UltraSparcIII update, network locking fixes
  - Al Viro: fix fs counts on mount failure

  - Rik van Riel and others: mm rw-semaphore (ps/top ok when swapping)
  - IDE: 256 sectors at a time is legal, but apparently confuses some
  drives. Max out at 255 sectors instead.
  - Petko Manolov: USB pegasus driver update
  - make the boottime memory map printout at least almost readable.
  - USB driver updates
  - pte_alloc()/pmd_alloc() need page_table_lock.

  - ReiserFS merge
  - fix DRM R128/AGP dependency