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Move the headers to include/asm-x86 and fixup the
header install make rules
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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It's useful to know which mm is allocating a pagetable. Xen uses this
to determine whether the pagetable being added to is pinned or not.
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
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SLUB cannot run on i386 at this point because i386 uses the page->private and
page->index field of slab pages for the pgd cache.
Make SLUB run on i386 by replacing the pgd slab cache with a quicklist.
Limit the changes as much as possible. Leave the improvised linked list in place
etc etc. This has been working here for a couple of weeks now.
Acked-by: William Lee Irwin III <wli@holomorphy.com>
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Move inclusion of asm/fixmap.h to where it is really used rather than
where it may have been used long ago (requires a few other adjustments
to includes due to previous implicit dependencies).
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andi Kleen <ak@suse.de>
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The VMI backend uses explicit page type notification to track shadow page
tables. The allocation of page table roots is especially tricky. We need to
clone the root for non-PAE mode while it is protected under the pgd lock to
correctly copy the shadow.
We don't need to allocate pgds in PAE mode, (PDPs in Intel terminology) as
they only have 4 entries, and are cached entirely by the processor, which
makes shadowing them rather simple.
For base page table level allocation, pmd_populate provides the exact hook
point we need. Also, we need to allocate pages when splitting a large page,
and we must release pages before returning the page to any free pool.
Despite being required with these slightly odd semantics for VMI, Xen also
uses these hooks to determine the exact moment when page tables are created or
released.
AK: All nops for other architectures
Signed-off-by: Zachary Amsden <zach@vmware.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Andi Kleen <ak@suse.de>
Cc: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
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Signed-off-by: David Woodhouse <dwmw2@infradead.org>
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This patch cleans up asm-*/pgalloc.h by removing the generous includes
which are obsoleted (duplicated) by including linux/mm.h (and friends)
They are double checked and verified by the PLM cross compiling service
(the patched kernel gives the same warnings/errors as the unpatched)
http://osdl.org/plm-cgi/plm?module=patch_info&patch_id=4313
Signed-off-by: Herbert Pötzl <herbert@13thfloor.at>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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i386 works with 2 and 3 levels
Signed-off-by: Andi Kleen <ak@suse.de>
Converted to use pud_t by Nick Piggin
Signed-off-by: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Adapt the i386 architecture to use the generic 2-level folding header.
Just to show how it is done.
Signed-off-by: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Cset exclude: akpm@digeo.com|ChangeSet|20030204165956|06074
Cset exclude: akpm@digeo.com|ChangeSet|20030204165949|06077
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From Bill Irwin
This allocates pgd's and pmd's using the slab and slab ctors. It has a
benefit beyond preconstruction in that PAE pmd's are accounted via
/proc/slabinfo
Profiling of kernel builds by Martin Bligh shows a 30-40% drop in CPU load
due to pgd_alloc()'s page clearing activity. But this was already a tiny
fraction of the overall CPU time.
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A patch from Martin Bligh which cleans up the open-coded uses of
mem_map for ia32. Basically it replaces
mem_map + pagenr
with
pfn_to_page(pagenr)
in lots of places. Because mem_map[] doesn't work like that with
discontigmem.
It also fixes a bug in bad_range, that happens to work for contig mem
systems, but is incorrect. Tested both with and without discontigmem
support.
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It has been noticed that across a kernel build many calls to
tlb_flush_mmu() do not have anything to flush, apparently because glibc
is mmapping a file over a previously-mapped region which has no
faulted-in ptes.
This patch detects this case and optimises away a little over one third
of the tlb invalidations.
The functions which potentially cause an invalidate are
tlb_remove_tlb_entry(), pte_free_tlb() and pmd_free_tlb(). These have
been front-ended in asm-generic/tlb.h and the per-arch versions now
have leading double-underscores. The generic versions tag the
mmu_gather_t as needing a flush and then call the arch-specific
version.
tlb_flush_mmu() looks at tlb->need_flush and if it sees that no real
activity has happened, the invalidation is avoided.
The success rate is displayed in /proc/meminfo for the while. This
should be removed later.
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This removes <linux/mm.h> from <linux/vmalloc.h>.
This then goes and fixes all of the files (x86 and PPC) which relied on
implicit includes which don't happen anymore. This also takes
<linux/kdev_t.h> out of fs/mpage.c and puts it into include/linux/bio.h
where it belongs since <linux/bio.h> references 'kdev_t' directly.
A quick summary of the of the added includes:
arch/i386/kernel/microcode.c: needs extern for num_physpages, in linux/mm.h
include/linux/spinlock.h: local_irq* is defined in <asm/system.h> but
this was never directly included.
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asm/pgtable.h and/or asm/pgalloc.h to asm/cacheflush.h, and
tlb flushing routines to asm/tlbflush.h.
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Add nop definition for x86.
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enables the allocation of the pagetables in highmem.
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On Sat, 2002-02-09 at 01:43, Linus Torvalds wrote:
> That will clean up all your issues with header file ordering.
You are right, it did. I removed all the sched.h dependencies and this
reduced the size of the patch greatly. I now use current_thread_info()
and none of the header or include hackery from before. I've tested this
with and without preemption enabled with success.
I appreciate your help with this.
Again, this is a minimal i386-only patch. I have other arches,
documentation, etc. Patch against 2.5.4-pre5. Enjoy,
Robert Love
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- Al Viro: fix up silly problem in swapfile filp cleanups in 2.5.2
- Tachino Nobuhiro: fix another error return for swapfile filp code
- Robert Love: merge some of Ingo's scheduler fixes
- David Miller: networking, sparc and some scsi driver fixes
- Tim Waugh: parport update
- OGAWA Hirofumi: fatfs cleanups and bugfixes
- Roland Dreier: fix vsscanf buglets.
- Ben LaHaise: include file cleanup
- Andre Hedrick: IDE taskfile update
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- Kai Germaschewski: ISDN updates
- Al Viro: start moving buffer cache indexing to "struct block_device *"
- Greg KH: USB update
- Russell King: fix up some ARM merge issues
- Ingo Molnar: scalable scheduler
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- Greg KH: USB update
- Richard Gooch: refcounting for devfs
- Jens Axboe: start of new block IO layer
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- Neil Brown: md cleanups/fixes
- Andrew Morton: console locking merge
- Andrea Arkangeli: major VM merge
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- Anton Altaparmakov: NTFS error checking
- Johannes Erdfelt: USB updates
- OGAWA Hirofumi: FAT update
- Alan Cox: driver + s390 update merge
- Richard Henderson: fix alpha sigsuspend error return value
- Marcelo Tosatti: per-zone VM shortage
- Daniel Phillips: generic use-once optimization instead of drop-behind
- Bjorn Wesen: Cris architecture update
- Anton Altaparmakov: support for Windows Dynamic Disks
- James Washer: LDT loading SMP bug fix
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- Johannes Erdfelt: USB updates
- David Howells: more rw-sem stuff
- David Miller: network callback cleanups and fixes
- Jan Harkes: make Coda use the proper VFS layer interfaces, so that it can use
"non-traditional-unix" filesystems without inode numbers for backing store.
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- 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
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- 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
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- 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.
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