Re: [GIT PULL] scheduler fixes

Pekka J Enberg
2009-05-25T12:04:27Z

> On Mon, May 25, 2009 at 02:37:59PM +0300, Pekka Enberg wrote:
> > On Mon, May 25, 2009 at 2:25 PM, Nick Piggin <npiggin@suse.de> wrote:
> > > The bootmem allocations of course are required because some hashes may
> > > need to be larger than MAX_ORDER without using vmalloc.
> > >
> > > kmem_cache_init (and mem_init, partially) sets up the kernel memory
> > > allocators...
> >
> > Which comment are you talking about? The "setup kernel memory
> > allocators" one? Yeah, I should probably move it couple of lines down.

On Mon, 25 May 2009, Nick Piggin wrote:
> Yes, just that one.

And oh, we probably want to do this too while at it. Nick?

>From b211497261670ff6f9af6b8b0fab429e848ccc87 Mon Sep 17 00:00:00 2001
From: Pekka Enberg <penberg@cs.helsinki.fi>
Date: Mon, 25 May 2009 15:01:35 +0300
Subject: [PATCH] vmalloc: use kzalloc() instead of alloc_bootmem()

We can call vmalloc_init() after kmem_cache_init() and use kzalloc() instead of
the bootmem allocator when initializing vmalloc data structures.

Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
---
init/main.c | 2 +-
mm/vmalloc.c | 3 +--
2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/init/main.c b/init/main.c
index fb0e004..766194c 100644
--- a/init/main.c
+++ b/init/main.c
@@ -585,13 +585,13 @@ asmlinkage void __init start_kernel(void)
__stop___param - __start___param,
&unknown_bootoption);
pidhash_init();
- vmalloc_init();
vfs_caches_init_early();
/*
* Set up kernel memory allocators
*/
mem_init();
kmem_cache_init();
+ vmalloc_init();
/*
* Set up the scheduler prior starting any interrupts (such as the
* timer interrupt). Full topology setup happens at smp_init()
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 083716e..3235138 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -23,7 +23,6 @@
#include <linux/rbtree.h>
#include <linux/radix-tree.h>
#include <linux/rcupdate.h>
-#include <linux/bootmem.h>
#include <linux/pfn.h>

#include <asm/atomic.h>
@@ -1032,7 +1031,7 @@ void __init vmalloc_init(void)

/* Import existing vmlist entries. */
for (tmp = vmlist; tmp; tmp = tmp->next) {
- va = alloc_bootmem(sizeof(struct vmap_area));
+ va = kzalloc(sizeof(struct vmap_area), GFP_NOWAIT);
va->flags = tmp->flags | VM_VM_AREA;
va->va_start = (unsigned long)tmp->addr;
va->va_end = va->va_start + tmp->size;
--
1.6.0.4