From: Jiang Liu <jiang.liu@linux.intel.com>
To: Andrew Morton <akpm@linux-foundation.org>,
Mel Gorman <mgorman@suse.de>,
David Rientjes <rientjes@google.com>,
Mike Galbraith <umgwanakikbuti@gmail.com>,
Peter Zijlstra <peterz@infradead.org>,
"Rafael J . Wysocki" <rafael.j.wysocki@intel.com>,
Grant Likely <grant.likely@linaro.org>,
Rob Herring <robh+dt@kernel.org>
Cc: Jiang Liu <jiang.liu@linux.intel.com>,
Tony Luck <tony.luck@intel.com>,
linux-mm@kvack.org, linux-hotplug@vger.kernel.org,
linux-kernel@vger.kernel.org, devicetree@vger.kernel.org
Subject: [RFC Patch V1 22/30] mm, of: Use cpu_to_mem()/numa_mem_id() to support memoryless node
Date: Fri, 11 Jul 2014 15:37:39 +0800 [thread overview]
Message-ID: <1405064267-11678-23-git-send-email-jiang.liu@linux.intel.com> (raw)
In-Reply-To: <1405064267-11678-1-git-send-email-jiang.liu@linux.intel.com>
When CONFIG_HAVE_MEMORYLESS_NODES is enabled, cpu_to_node()/numa_node_id()
may return a node without memory, and later cause system failure/panic
when calling kmalloc_node() and friends with returned node id.
So use cpu_to_mem()/numa_mem_id() instead to get the nearest node with
memory for the/current cpu.
If CONFIG_HAVE_MEMORYLESS_NODES is disabled, cpu_to_mem()/numa_mem_id()
is the same as cpu_to_node()/numa_node_id().
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
---
drivers/of/base.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/of/base.c b/drivers/of/base.c
index b9864806e9b8..40d4772973ad 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -85,7 +85,7 @@ EXPORT_SYMBOL(of_n_size_cells);
#ifdef CONFIG_NUMA
int __weak of_node_to_nid(struct device_node *np)
{
- return numa_node_id();
+ return numa_mem_id();
}
#endif
--
1.7.10.4
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next parent reply other threads:[~2014-07-11 7:37 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1405064267-11678-1-git-send-email-jiang.liu@linux.intel.com>
2014-07-11 7:37 ` Jiang Liu [this message]
2014-07-21 17:52 ` [RFC Patch V1 22/30] mm, of: Use cpu_to_mem()/numa_mem_id() to support memoryless node Nishanth Aravamudan
2014-07-28 13:30 ` Grant Likely
2014-07-28 19:26 ` Nishanth Aravamudan
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1405064267-11678-23-git-send-email-jiang.liu@linux.intel.com \
--to=jiang.liu@linux.intel.com \
--cc=akpm@linux-foundation.org \
--cc=devicetree@vger.kernel.org \
--cc=grant.likely@linaro.org \
--cc=linux-hotplug@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=mgorman@suse.de \
--cc=peterz@infradead.org \
--cc=rafael.j.wysocki@intel.com \
--cc=rientjes@google.com \
--cc=robh+dt@kernel.org \
--cc=tony.luck@intel.com \
--cc=umgwanakikbuti@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).