25 May, 2011
2 commits
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Fold all the mmu_gather rework patches into one for submission
Signed-off-by: Peter Zijlstra
Reported-by: Hugh Dickins
Cc: Benjamin Herrenschmidt
Cc: David Miller
Cc: Martin Schwidefsky
Cc: Russell King
Cc: Paul Mundt
Cc: Jeff Dike
Cc: Richard Weinberger
Cc: Tony Luck
Cc: KAMEZAWA Hiroyuki
Cc: Mel Gorman
Cc: KOSAKI Motohiro
Cc: Nick Piggin
Cc: Namhyung Kim
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
It is not referenced by any Makefile. pte_alloc_one_kernel() and
pte_alloc_one() is implemented in arch/xtensa/include/asm/pgalloc.h.Signed-off-by: Sebastian Andrzej Siewior
Cc: Chris Zankel
Cc: Thomas Gleixner
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
05 Jun, 2010
1 commit
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As explained in commit 1c0fe6e3bd ("mm: invoke oom-killer from page
fault") , we want to call the architecture independent oom killer when
getting an unexplained OOM from handle_mm_fault, rather than simply
killing current.Signed-off-by: Nick Piggin
Acked-by: David Rientjes
Cc: Chris Zankel
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
30 Mar, 2010
1 commit
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…it slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
21 Feb, 2010
1 commit
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On VIVT ARM, when we have multiple shared mappings of the same file
in the same MM, we need to ensure that we have coherency across all
copies. We do this via make_coherent() by making the pages
uncacheable.This used to work fine, until we allowed highmem with highpte - we
now have a page table which is mapped as required, and is not available
for modification via update_mmu_cache().Ralf Beache suggested getting rid of the PTE value passed to
update_mmu_cache():On MIPS update_mmu_cache() calls __update_tlb() which walks pagetables
to construct a pointer to the pte again. Passing a pte_t * is much
more elegant. Maybe we might even replace the pte argument with the
pte_t?Ben Herrenschmidt would also like the pte pointer for PowerPC:
Passing the ptep in there is exactly what I want. I want that
-instead- of the PTE value, because I have issue on some ppc cases,
for I$/D$ coherency, where set_pte_at() may decide to mask out the
_PAGE_EXEC.So, pass in the mapped page table pointer into update_mmu_cache(), and
remove the PTE value, updating all implementations and call sites to
suit.Includes a fix from Stephen Rothwell:
sparc: fix fallout from update_mmu_cache API change
Signed-off-by: Stephen Rothwell
Acked-by: Benjamin Herrenschmidt
Signed-off-by: Russell King
22 Sep, 2009
1 commit
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Commit 96177299416dbccb73b54e6b344260154a445375 ("Drop free_pages()")
modified nr_free_pages() to return 'unsigned long' instead of 'unsigned
int'. This made the casts to 'unsigned long' in most callers superfluous,
so remove them.[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Geert Uytterhoeven
Reviewed-by: Christoph Lameter
Acked-by: Ingo Molnar
Acked-by: Russell King
Acked-by: David S. Miller
Acked-by: Kyle McMartin
Acked-by: WANG Cong
Cc: Richard Henderson
Cc: Ivan Kokshaysky
Cc: Haavard Skinnemoen
Cc: Mikael Starvik
Cc: "Luck, Tony"
Cc: Hirokazu Takata
Cc: Ralf Baechle
Cc: David Howells
Acked-by: Benjamin Herrenschmidt
Cc: Martin Schwidefsky
Cc: Paul Mundt
Cc: Chris Zankel
Cc: Michal Simek
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
22 Jun, 2009
1 commit
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This allows the callers to now pass down the full set of FAULT_FLAG_xyz
flags to handle_mm_fault(). All callers have been (mechanically)
converted to the new calling convention, there's almost certainly room
for architectures to clean up their code and then add FAULT_FLAG_RETRY
when that support is added.Signed-off-by: Linus Torvalds
03 Apr, 2009
4 commits
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Add support for !CONFIG_MMU setups.
Signed-off-by: Johannes Weiner
Signed-off-by: Chris Zankel -
The current assumption of the memory code is that the first RAM PFN in
the system is 0.Adjust the relevant code to play well with setups where memory starts
at higher addresses, indicated by PLATFORM_DEFAULT_MEM_START.The new memory model looks like this:
+----------+--+----------------------+----------------+
| | | | |
| | | RAM | |
| | | | |
+----------+--+----------------------+----------------+
| | | | |
+- PFN 0 | +- min_low_pfn +- max_low_pfn +- max_pfn
|
+- ARCH_PFN_OFFSET
+- PLATFORM_DEFAULT_MEM_START >> PAGE_SIZEThe memory map contains pages starting from pfn ARCH_PFN_OFFSET up to
max_low_pfn. The only zone used right now will span exactly the same
region.Usually, ARCH_PFN_OFFSET and min_low_pfn are the same value. Handle
them separately for robustness. Gapping pages will be in the memory
map but marked as reserved and won't be touched.Signed-off-by: Johannes Weiner
Signed-off-by: Chris Zankel -
If min_low_pfn is non-zero, the bitmap reserved for bootmem is bigger
than needed. The number of pages bootmem has to maintain is the range
from min_low_pfn to max_low_pfn.For now it has only been a theoretical mistake, min_low_pfn was always
zero.Signed-off-by: Johannes Weiner
Signed-off-by: Chris Zankel -
The second argument to init_bootmem_node() is the PFN to place the
bootmem bitmap at and the third argument is the first PFN on the node.This is currently backwards but never made any problems as both values
were always zero.Signed-off-by: Johannes Weiner
Signed-off-by: Chris Zankel
11 Mar, 2009
1 commit
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* ->put_char changes
* HIGHMEM is bogus it seems, there is no kmap_atomic() et al
* some includesSigned-off-by: Alexey Dobriyan
Acked-by: Chris Zankel
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
27 Jul, 2008
2 commits
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Remove arch-specific show_mem() in favor of the generic version.
This also removes the following redundant information display:
- free pages, printed by show_free_areas()
- pages in swapcache, printed by show_swap_cache_info()where show_mem() calls show_free_areas(), which calls
show_swap_cache_info().Signed-off-by: Johannes Weiner
Cc: Chris Zankel
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Kmem cache passed to constructor is only needed for constructors that are
themselves multiplexeres. Nobody uses this "feature", nor does anybody uses
passed kmem cache in non-trivial way, so pass only pointer to object.Non-trivial places are:
arch/powerpc/mm/init_64.c
arch/powerpc/mm/hugetlbpage.cThis is flag day, yes.
Signed-off-by: Alexey Dobriyan
Acked-by: Pekka Enberg
Acked-by: Christoph Lameter
Cc: Jon Tollefson
Cc: Nick Piggin
Cc: Matt Mackall
[akpm@linux-foundation.org: fix arch/powerpc/mm/hugetlbpage.c]
[akpm@linux-foundation.org: fix mm/slab.c]
[akpm@linux-foundation.org: fix ubifs]
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
14 Feb, 2008
4 commits
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Set the execution bit in the temporary TLB when we flush the
instruction cache.Signed-off-by: Chris Zankel
-
The TLB entry for the user address doesn't exist at the time we
want to flush the caches, so use the page address. Note that processor
configurations with cache-aliasing issues are treated separately.Signed-off-by: Chris Zankel
-
The argument list for ctor function element in the
kmem_cache structure has changed.Signed-off-by: Chris Zankel
-
Signed-off-by: Lucas Woods
Signed-off-by: Andrew Morton
Signed-off-by: Christian Zankel
29 Jan, 2008
1 commit
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"make dep" is no longer required in kernel 2.6, but was still mentioned
in some places.Signed-off-by: Adrian Bunk
Signed-off-by: Sam Ravnborg
20 Oct, 2007
1 commit
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is_init() is an ambiguous name for the pid==1 check. Split it into
is_global_init() and is_container_init().A cgroup init has it's tsk->pid == 1.
A global init also has it's tsk->pid == 1 and it's active pid namespace
is the init_pid_ns. But rather than check the active pid namespace,
compare the task structure with 'init_pid_ns.child_reaper', which is
initialized during boot to the /sbin/init process and never changes.Changelog:
2.6.22-rc4-mm2-pidns1:
- Use 'init_pid_ns.child_reaper' to determine if a given task is the
global init (/sbin/init) process. This would improve performance
and remove dependence on the task_pid().2.6.21-mm2-pidns2:
- [Sukadev Bhattiprolu] Changed is_container_init() calls in {powerpc,
ppc,avr32}/traps.c for the _exception() call to is_global_init().
This way, we kill only the cgroup if the cgroup's init has a
bug rather than force a kernel panic.[akpm@linux-foundation.org: fix comment]
[sukadev@us.ibm.com: Use is_global_init() in arch/m32r/mm/fault.c]
[bunk@stusta.de: kernel/pid.c: remove unused exports]
[sukadev@us.ibm.com: Fix capability.c to work with threaded init]
Signed-off-by: Serge E. Hallyn
Signed-off-by: Sukadev Bhattiprolu
Acked-by: Pavel Emelianov
Cc: Eric W. Biederman
Cc: Cedric Le Goater
Cc: Dave Hansen
Cc: Herbert Poetzel
Cc: Kirill Korotaev
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
17 Oct, 2007
1 commit
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We have had complaints where a threaded application is left in a bad state
after one of it's threads is killed when we hit a VM: out_of_memory
condition.Killing just one of the process threads can leave the application in a bad
state, whereas killing the entire process group would allow for the
application to restart, or be otherwise handled, and makes it very obvious
that something has gone wrong.This change allows the entire process group to be taken down, rather
than just the one thread.Signed-off-by: Will Schmidt
Cc: Richard Henderson
Cc: Ivan Kokshaysky
Cc: Russell King
Cc: Ian Molton
Cc: Haavard Skinnemoen
Cc: Mikael Starvik
Cc: David Howells
Cc: Andi Kleen
Cc: "Luck, Tony"
Cc: Hirokazu Takata
Cc: Geert Uytterhoeven
Cc: Roman Zippel
Cc: Ralf Baechle
Cc: Kyle McMartin
Cc: Matthew Wilcox
Cc: Paul Mackerras
Cc: Benjamin Herrenschmidt
Cc: Heiko Carstens
Cc: Martin Schwidefsky
Cc: Paul Mundt
Cc: Kazumoto Kojima
Cc: Richard Curnow
Cc: William Lee Irwin III
Cc: "David S. Miller"
Cc: Chris Zankel
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
28 Aug, 2007
1 commit
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Add support for processors that have cache-aliasing issues, such as
the Stretch S5000 processor. Cache-aliasing means that the size of
the cache (for one way) is larger than the page size, thus, a page
can end up in several places in cache depending on the virtual to
physical translation. The method used here is to map a user page
temporarily through the auto-refill way 0 and of of the DTLB.
We probably will want to revisit this issue and use a better
approach with kmap/kunmap.Signed-off-by: Chris Zankel
20 Jul, 2007
1 commit
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This patch completes Linus's wish that the fault return codes be made into
bit flags, which I agree makes everything nicer. This requires requires
all handle_mm_fault callers to be modified (possibly the modifications
should go further and do things like fault accounting in handle_mm_fault --
however that would be for another patch).[akpm@linux-foundation.org: fix alpha build]
[akpm@linux-foundation.org: fix s390 build]
[akpm@linux-foundation.org: fix sparc build]
[akpm@linux-foundation.org: fix sparc64 build]
[akpm@linux-foundation.org: fix ia64 build]
Signed-off-by: Nick Piggin
Cc: Richard Henderson
Cc: Ivan Kokshaysky
Cc: Russell King
Cc: Ian Molton
Cc: Bryan Wu
Cc: Mikael Starvik
Cc: David Howells
Cc: Yoshinori Sato
Cc: "Luck, Tony"
Cc: Hirokazu Takata
Cc: Geert Uytterhoeven
Cc: Roman Zippel
Cc: Greg Ungerer
Cc: Matthew Wilcox
Cc: Paul Mackerras
Cc: Benjamin Herrenschmidt
Cc: Heiko Carstens
Cc: Martin Schwidefsky
Cc: Paul Mundt
Cc: Kazumoto Kojima
Cc: Richard Curnow
Cc: William Lee Irwin III
Cc: "David S. Miller"
Cc: Jeff Dike
Cc: Paolo 'Blaisorblade' Giarrusso
Cc: Miles Bader
Cc: Chris Zankel
Acked-by: Kyle McMartin
Acked-by: Haavard Skinnemoen
Acked-by: Ralf Baechle
Acked-by: Andi Kleen
Signed-off-by: Andrew Morton
[ Still apparently needs some ARM and PPC loving - Linus ]
Signed-off-by: Linus Torvalds
01 Jun, 2007
1 commit
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Spelling fixes in arch/xtensa/.
Signed-off-by: Simon Arlott
Signed-off-by: Chris Zankel
11 Dec, 2006
1 commit
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The Xtensa port contained many header files that were never needed. This
rather lengthy patch removes all those files. Unfortunately, there were
many dependencies that needed to be updated, so this patch touches quite a
few source files.Signed-off-by: Chris Zankel
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
04 Oct, 2006
1 commit
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Many files include the filename at the beginning, serveral used a wrong one.
Signed-off-by: Uwe Zeisberger
Signed-off-by: Adrian Bunk
30 Sep, 2006
1 commit
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This is an updated version of Eric Biederman's is_init() patch.
(http://lkml.org/lkml/2006/2/6/280). It applies cleanly to 2.6.18-rc3 and
replaces a few more instances of ->pid == 1 with is_init().Further, is_init() checks pid and thus removes dependency on Eric's other
patches for now.Eric's original description:
There are a lot of places in the kernel where we test for init
because we give it special properties. Most significantly init
must not die. This results in code all over the kernel test
->pid == 1.Introduce is_init to capture this case.
With multiple pid spaces for all of the cases affected we are
looking for only the first process on the system, not some other
process that has pid == 1.Signed-off-by: Eric W. Biederman
Signed-off-by: Sukadev Bhattiprolu
Cc: Dave Hansen
Cc: Serge Hallyn
Cc: Cedric Le Goater
Cc:
Acked-by: Paul Mackerras
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
01 Jul, 2006
1 commit
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Signed-off-by: Jörn Engel
Signed-off-by: Adrian Bunk
22 Mar, 2006
3 commits
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set_page_count usage outside mm/ is limited to setting the refcount to 1.
Remove set_page_count from outside mm/, and replace those users with
init_page_count() and set_page_refcounted().This allows more debug checking, and tighter control on how code is allowed
to play around with page->_count.Signed-off-by: Nick Piggin
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Have an explicit mm call to split higher order pages into individual pages.
Should help to avoid bugs and be more explicit about the code's intention.Signed-off-by: Nick Piggin
Cc: Russell King
Cc: David Howells
Cc: Ralf Baechle
Cc: Benjamin Herrenschmidt
Cc: Paul Mundt
Cc: "David S. Miller"
Cc: Chris Zankel
Signed-off-by: Yoichi Yuasa
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
- Don't return uninitialised stack values in case of allocation failure
- Don't bother clearing PageCompound because __GFP_COMP wasn't specified
Increment over the pte page rather than one pte entry in
pte_alloc_one_kernel- Actually increment the page pointer in pte_alloc_one
- Compile fixes, typos.
Signed-off-by: Nick Piggin
Acked-by: Chris Zankel
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
23 Sep, 2005
1 commit
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Remove io_remap_page_range() from all of Linux 2.6.x (as requested and
suggested by Randy Dunlap) and minor clean-ups.Signed-off-by: Chris Zankel
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
24 Jun, 2005
1 commit
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The attached patches provides part 5 of an architecture implementation for the
Tensilica Xtensa CPU series.Signed-off-by: Chris Zankel
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds