linux-kernel - Re: 2.6.26-rc5-mm1

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Date:	Mon, 9 Jun 2008 22:52:38 +0530
From:	Balbir Singh <balbir@...ux.vnet.ibm.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: 2.6.26-rc5-mm1

* Balbir Singh <balbir@...ux.vnet.ibm.com> [2008-06-09 22:50:49]:

> Andrew Morton wrote:
> > 
> > +memrlimit-add-memrlimit-controller-documentation.patch
> > +memrlimit-setup-the-memrlimit-controller.patch
> > +memrlimit-cgroup-mm-owner-callback-changes-to-add-task-info.patch
> > +memrlimit-add-memrlimit-controller-accounting-and-control.patch
> > 
> >  New cgroup conrtoller
> > 

Hi, Andrew,

There seems to be a merge fuzz, sorry for not catching it when you sent the mm
merge email

What I sent was

@@ -2056,6 +2058,7 @@ void exit_mmap(struct mm_struct *mm)
 	/* Use -1 here to ensure all VMAs in the mm are unmapped */
 	end = unmap_vmas(&tlb, vma, 0, -1, &nr_accounted, NULL);
 	vm_unacct_memory(nr_accounted);
+	memrlimit_cgroup_uncharge_as(mm, mm->total_vm);

What got merged is

@@ -1756,7 +1783,8 @@ static void unmap_region(struct mm_struc
        update_hiwater_rss(mm);
        unmap_vmas(&tlb, vma, start, end, &nr_accounted, NULL);
        vm_unacct_memory(nr_accounted);
-       free_pgtables(&tlb, vma, prev? prev->vm_end: FIRST_USER_ADDRESS,
+       memrlimit_cgroup_uncharge_as(mm, mm->total_vm);

Here's a patch to fix the problem


Signed-off-by: Balbir Singh <balbir@...ux.vnet.ibm.com>
---

 mm/mmap.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff -puN mm/memory.c~memrlimit-fix-fuzz-in-merge mm/memory.c
diff -puN mm/mmap.c~memrlimit-fix-fuzz-in-merge mm/mmap.c
--- linux-2.6.26-rc5/mm/mmap.c~memrlimit-fix-fuzz-in-merge	2008-06-09 22:49:49.000000000 +0530
+++ linux-2.6.26-rc5-balbir/mm/mmap.c	2008-06-09 22:50:13.000000000 +0530
@@ -1783,7 +1783,6 @@ static void unmap_region(struct mm_struc
 	update_hiwater_rss(mm);
 	unmap_vmas(&tlb, vma, start, end, &nr_accounted, NULL);
 	vm_unacct_memory(nr_accounted);
-	memrlimit_cgroup_uncharge_as(mm, mm->total_vm);
 	free_pgtables(tlb, vma, prev? prev->vm_end: FIRST_USER_ADDRESS,
 				 next? next->vm_start: 0);
 	tlb_finish_mmu(tlb, start, end);
@@ -2111,6 +2110,7 @@ void exit_mmap(struct mm_struct *mm)
 	/* Use -1 here to ensure all VMAs in the mm are unmapped */
 	end = unmap_vmas(&tlb, vma, 0, -1, &nr_accounted, NULL);
 	vm_unacct_memory(nr_accounted);
+	memrlimit_cgroup_uncharge_as(mm, mm->total_vm);
 	free_pgtables(tlb, vma, FIRST_USER_ADDRESS, 0);
 	tlb_finish_mmu(tlb, 0, end);
 
_


-- 
	Warm Regards,
	Balbir Singh
	Linux Technology Center
	IBM, ISTL
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