lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

[PATCH] x86_64: Handle empty PXMs that only contain hotplug memory

Browse Source 
The node setup code would try to allocate the node metadata in the node
itself, but that fails if there is no memory in there.

This can happen with memory hotplug when the hotplug area defines an so
far empty node.

Now use bootmem to try to allocate the mem_map in other nodes.

And if it fails don't panic, but just ignore the node.

To make this work I added a new __alloc_bootmem_nopanic function that
does what its name implies.

TBD should try to use nearby nodes here.  Currently we just use any.
It's hard to do it better because bootmem doesn't have proper fallback
lists yet.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Andi Kleen
2006-04-07 19:49:21 +02:00
committed by Linus Torvalds
parent 68a3a7feb0
commit a8062231d8
4 changed files with 47 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
mm/bootmem.c
View File

@@ -401,7 +401,7 @@ unsigned long __init free_all_bootmem (void)
return(free_all_bootmem_core(NODE_DATA(0)));
}
void * __init __alloc_bootmem(unsigned long size, unsigned long align, unsigned long goal)
void * __init __alloc_bootmem_nopanic(unsigned long size, unsigned long align, unsigned long goal)
{
bootmem_data_t *bdata;
void *ptr;
@@ -409,7 +409,14 @@ void * __init __alloc_bootmem(unsigned long size, unsigned long align, unsigned
list_for_each_entry(bdata, &bdata_list, list)
if ((ptr = __alloc_bootmem_core(bdata, size, align, goal, 0)))
return(ptr);
return NULL;
}
void * __init __alloc_bootmem(unsigned long size, unsigned long align, unsigned long goal)
{
void *mem = __alloc_bootmem_nopanic(size,align,goal);
if (mem)
return mem;
/*
* Whoops, we cannot satisfy the allocation request.
*/