Commit 822c18f2 authored Jan 15, 2009 by Ivan Kokshaysky Committed by Linus Torvalds Jan 15, 2009

alpha: fix vmalloc breakage



On alpha, we have to map some stuff in the VMALLOC space very early in the
boot process (to make SRM console callbacks work and so on, see
arch/alpha/mm/init.c).  For old VM allocator, we just manually placed a
vm_struct onto the global vmlist and this worked for ages.

Unfortunately, the new allocator isn't aware of this, so it constantly
tries to allocate the VM space which is already in use, making vmalloc on
alpha defunct.

This patch forces KVA to import vmlist entries on init.

[akpm@linux-foundation.org: remove unneeded check (per Johannes)]
Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Nick Piggin <npiggin@suse.de>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent b46578ed

mm/vmalloc.c

+11 −0

Original line number	Diff line number	Diff line
		@@ -24,6 +24,7 @@
		#include <linux/rbtree.h>
		#include <linux/radix-tree.h>
		#include <linux/rcupdate.h>
		#include <linux/bootmem.h>

		#include <asm/atomic.h>
		#include <asm/uaccess.h>
		@@ -984,6 +985,8 @@ EXPORT_SYMBOL(vm_map_ram);

		void __init vmalloc_init(void)
		{
		struct vmap_area *va;
		struct vm_struct *tmp;
		int i;

		for_each_possible_cpu(i) {
		@@ -996,6 +999,14 @@ void __init vmalloc_init(void)
		vbq->nr_dirty = 0;
		}

		/* Import existing vmlist entries. */
		for (tmp = vmlist; tmp; tmp = tmp->next) {
		va = alloc_bootmem(sizeof(struct vmap_area));
		va->flags = tmp->flags \| VM_VM_AREA;
		va->va_start = (unsigned long)tmp->addr;
		va->va_end = va->va_start + tmp->size;
		__insert_vmap_area(va);
		}
		vmap_initialized = true;
		}

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