On Tue, 2007-10-09 at 16:40 +0100, Mel Gorman wrote:
<snip>
> ====
> Subject: Use specified node ID with GFP_THISNODE if available
>
> It had been assumed that __GFP_THISNODE meant allocating from the local
> node and only the local node. However, users of alloc_pages_node() may also
> specify GFP_THISNODE. In this case, only the specified node should be used.
> This patch will allocate pages only from the requested node when GFP_THISNODE
> is used with alloc_pages_node().
>
> [[email protected]: Detailed analysis of problem]
> Found-by: Lee Schermerhorn <[email protected]>
> Signed-off-by: Mel Gorman <[email protected]>
>
<snip>
Mel: I applied this patch [to your v8 series--the most recent, I
think?] and it does fix the problem. However, now I'm tripping over
this warning in __alloc_pages_nodemask:
/* Specifying both __GFP_THISNODE and nodemask is stupid. Warn user */
WARN_ON(gfp_mask & __GFP_THISNODE);
for each huge page allocated. Rather slow as my console is a virtual
serial line and the warning includes the stack traceback.
I think we want to just drop this warning, but maybe you have a tighter
condition that you want to warn about?
Lee
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