linux-next: manual merge of the nommu tree

linux-next: manual merge of the nommu tree

[Stephen Rothwell]

Hi David,

Today's linux-next merge of the nommu tree got a conflict in
Documentation/sysctl/vm.txt between commit
cb8fc7a88a0069ebdab220180bf9b45e568f0ba9 ("slub: Trigger defragmentation
from memory reclaim") from the slab tree and commit
1a5d96d0151ce2ec77bf08498751fe8d9365c95f ("NOMMU: Make mmap allocation
page trimming behaviour configurable.") from the nommu tree.

Just overlapping additions.  I fixed it up (see below) and can carry the
fix as necessary.
-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/

diff --cc Documentation/sysctl/vm.txt
index 5e7329a,e9a5c28..0000000
--- a/Documentation/sysctl/vm.txt
+++ b/Documentation/sysctl/vm.txt
@@@ -38,7 -38,7 +38,8 @@@ Currently, these files are in /proc/sys
  - numa_zonelist_order
  - nr_hugepages
  - nr_overcommit_hugepages
 +- slab_defrag_limit
+ - nr_trim_pages		(only if CONFIG_MMU=n)
  
  ==============================================================
  
@@@ -351,11 -351,17 +352,27 @@@ See Documentation/vm/hugetlbpage.tx
  
  ==============================================================
  
 +slab_defrag_limit
 +
 +Determines the frequency of calls from reclaim into slab defragmentation.
 +Slab defrag reclaims objects from sparsely populates slab pages.
 +The default is 1000. Increase if slab defragmentation occurs
 +too frequently. Decrease if more slab defragmentation passes
 +are needed. The slabinfo tool can report on the frequency of the callbacks.
 +
++==============================================================
++
+ nr_trim_pages
+ 
+ This is available only on NOMMU kernels.
+ 
+ This value adjusts the excess page trimming behaviour of power-of-2 aligned
+ NOMMU mmap allocations.
+ 
+ A value of 0 disables trimming of allocations entirely, while a value of 1
+ trims excess pages aggressively. Any value >= 1 acts as the watermark where
+ trimming of allocations is initiated.
+ 
+ The default value is 1.
+ 
+ See Documentation/nommu-mmap.txt for more information.

Re: linux-next: manual merge of the nommu tree

[Paul Mundt]

On Thu, Dec 11, 2008 at 06:25:30PM +1100, Stephen Rothwell wrote:
> Hi David,
> 
> Today's linux-next merge of the nommu tree got a conflict in
> Documentation/sysctl/vm.txt between commit
> cb8fc7a88a0069ebdab220180bf9b45e568f0ba9 ("slub: Trigger defragmentation
> from memory reclaim") from the slab tree and commit
> 1a5d96d0151ce2ec77bf08498751fe8d9365c95f ("NOMMU: Make mmap allocation
> page trimming behaviour configurable.") from the nommu tree.
> 
> Just overlapping additions.  I fixed it up (see below) and can carry the
> fix as necessary.

I suppose this is what happens when everyone has the same bright idea of
appending to the end of the file. Though I am surprised that there was
contention in Documentation/ of all places. Thanks for fixing this up.

linux-next: manual merge of the nommu tree

[Stephen Rothwell]

Hi David,

Today's linux-next merge of the nommu tree got a conflict in
kernel/fork.c between commit e6df1035b1b488cafde1e69f1a25f2706c3ac1f7
("kmemcheck: add mm functions") from the kmemcheck tree and commit
f65466230e8afd45f716e5b836711ce270f45105 ("NOMMU: Make VMAs per MM as for
MMU-mode linux") from the nommu tree.

I fixed it up as best I can (see below) and can carry the fix as
necessary (though it would be good if you guys could figure out a better
solution).
-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/

diff --cc kernel/fork.c
index 446167a,d7c5b42..0000000
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@@ -1459,23 -1451,21 +1459,21 @@@ void __init proc_caches_init(void
  {
  	sighand_cachep = kmem_cache_create("sighand_cache",
  			sizeof(struct sighand_struct), 0,
 -			SLAB_HWCACHE_ALIGN|SLAB_PANIC|SLAB_DESTROY_BY_RCU,
 -			sighand_ctor);
 +			SLAB_HWCACHE_ALIGN|SLAB_PANIC|SLAB_DESTROY_BY_RCU|
 +			SLAB_NOTRACK, sighand_ctor);
  	signal_cachep = kmem_cache_create("signal_cache",
  			sizeof(struct signal_struct), 0,
 -			SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL);
 +			SLAB_HWCACHE_ALIGN|SLAB_PANIC|SLAB_NOTRACK, NULL);
  	files_cachep = kmem_cache_create("files_cache",
  			sizeof(struct files_struct), 0,
 -			SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL);
 +			SLAB_HWCACHE_ALIGN|SLAB_PANIC|SLAB_NOTRACK, NULL);
  	fs_cachep = kmem_cache_create("fs_cache",
  			sizeof(struct fs_struct), 0,
 -			SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL);
 +			SLAB_HWCACHE_ALIGN|SLAB_PANIC|SLAB_NOTRACK, NULL);
- 	vm_area_cachep = kmem_cache_create("vm_area_struct",
- 			sizeof(struct vm_area_struct), 0,
- 			SLAB_PANIC|SLAB_NOTRACK, NULL);
  	mm_cachep = kmem_cache_create("mm_struct",
  			sizeof(struct mm_struct), ARCH_MIN_MMSTRUCT_ALIGN,
 -			SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL);
 +			SLAB_HWCACHE_ALIGN|SLAB_PANIC|SLAB_NOTRACK, NULL);
+ 	mmap_init();
  }
  
  /*
diff --git a/mm/mmap.c b/mm/mmap.c
index 6e5fc98..d85193e 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -2478,5 +2478,5 @@ void __init mmap_init(void)
 {
 	vm_area_cachep = kmem_cache_create("vm_area_struct",
 			sizeof(struct vm_area_struct), 0,
-			SLAB_PANIC, NULL);
+			SLAB_PANIC|SLAB_NOTRACK, NULL);
 }
diff --git a/mm/nommu.c b/mm/nommu.c
index 61b7f7a..efb3d01 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -447,10 +447,10 @@ void __init mmap_init(void)
 {
 	vm_region_jar = kmem_cache_create("vm_region_jar",
 					  sizeof(struct vm_region), 0,
-					  SLAB_PANIC, NULL);
+					  SLAB_PANIC|SLAB_NOTRACK, NULL);
 	vm_area_cachep = kmem_cache_create("vm_area_struct",
 					   sizeof(struct vm_area_struct), 0,
-					   SLAB_PANIC, NULL);
+					   SLAB_PANIC|SLAB_NOTRACK, NULL);
 }
 
 /*

linux-next: manual merge of the nommu tree

[Stephen Rothwell]

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Hi David,

Today's linux-next merge of the nommu tree got a conflict in
mm/tiny-shmem.c between commit 853ac43ab194f5051b27a55060215d696dc9480d
("shmem: unify regular and tiny shmem") from Linus' tree and commit
d10f9907ba3626261f45dbb498867f441f06c486 ("shmem: remove unused
shmem_get_unmapped_area") from the nommu tree.

The former removed the file and so have I.
-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/

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Re: linux-next: manual merge of the nommu tree

[Matt Mackall]

On Thu, 2009-01-08 at 15:30 +1100, Stephen Rothwell wrote:
> Hi David,
> 
> Today's linux-next merge of the nommu tree got a conflict in
> mm/tiny-shmem.c between commit 853ac43ab194f5051b27a55060215d696dc9480d
> ("shmem: unify regular and tiny shmem") from Linus' tree and commit
> d10f9907ba3626261f45dbb498867f441f06c486 ("shmem: remove unused
> shmem_get_unmapped_area") from the nommu tree.

Thanks for cleaning this up, but this probably shouldn't have happened.
I wrote the remove patch first, then wrote the unify patch on top of it
and sent them both off, numbered, to Hugh. Not sure how or why they went
through different trees.

-- 
Mathematics is the supreme nostalgia of our time.

Re: linux-next: manual merge of the nommu tree

[David Howells]

Stephen Rothwell <sfr@canb.auug.org.au> wrote:

> Today's linux-next merge of the nommu tree got a conflict in
> mm/tiny-shmem.c between commit 853ac43ab194f5051b27a55060215d696dc9480d
> ("shmem: unify regular and tiny shmem") from Linus' tree and commit
> d10f9907ba3626261f45dbb498867f441f06c486 ("shmem: remove unused
> shmem_get_unmapped_area") from the nommu tree.

I've updated the nommu tree.

David

Re: linux-next: manual merge of the nommu tree

[Stephen Rothwell]

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Hi David,

On Thu, 08 Jan 2009 12:46:29 +0000 David Howells <dhowells@redhat.com> wrote:
>
> I've updated the nommu tree.

Thanks.

-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/

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