From: Ben Widawsky <ben.widawsky@intel.com>
To: linux-mm <linux-mm@kvack.org>
Subject: [PATCH 07/18] mm/mempolicy: allow preferred code to take a nodemask
Date: Fri, 19 Jun 2020 09:24:03 -0700 [thread overview]
Message-ID: <20200619162414.1052234-8-ben.widawsky@intel.com> (raw)
In-Reply-To: <20200619162414.1052234-1-ben.widawsky@intel.com>
From: Dave Hansen <dave.hansen@linux.intel.com>
Create a helper function (mpol_new_preferred_many()) which is usable
both by the old, single-node MPOL_PREFERRED and the new
MPOL_PREFERRED_MANY.
Enforce the old single-node MPOL_PREFERRED behavior in the "new"
version of mpol_new_preferred() which calls mpol_new_preferred_many().
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Ben Widawsky <ben.widawsky@intel.com>
---
mm/mempolicy.c | 17 +++++++++++++++--
1 file changed, 15 insertions(+), 2 deletions(-)
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 6c7301cefeb6..541675a5b947 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -203,17 +203,30 @@ static int mpol_new_interleave(struct mempolicy *pol, const nodemask_t *nodes)
return 0;
}
-static int mpol_new_preferred(struct mempolicy *pol, const nodemask_t *nodes)
+static int mpol_new_preferred_many(struct mempolicy *pol,
+ const nodemask_t *nodes)
{
if (!nodes)
pol->flags |= MPOL_F_LOCAL; /* local allocation */
else if (nodes_empty(*nodes))
return -EINVAL; /* no allowed nodes */
else
- pol->v.preferred_nodes = nodemask_of_node(first_node(*nodes));
+ pol->v.preferred_nodes = *nodes;
return 0;
}
+static int mpol_new_preferred(struct mempolicy *pol, const nodemask_t *nodes)
+{
+ if (nodes) {
+ /* MPOL_PREFERRED can only take a single node: */
+ nodemask_t tmp = nodemask_of_node(first_node(*nodes));
+
+ return mpol_new_preferred_many(pol, &tmp);
+ }
+
+ return mpol_new_preferred_many(pol, NULL);
+}
+
static int mpol_new_bind(struct mempolicy *pol, const nodemask_t *nodes)
{
if (nodes_empty(*nodes))
--
2.27.0
next prev parent reply other threads:[~2020-06-19 16:25 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-19 16:23 [PATCH 00/18] multiple preferred nodes Ben Widawsky
2020-06-19 16:23 ` [PATCH 01/18] mm/mempolicy: Add comment for missing LOCAL Ben Widawsky
2020-06-19 16:23 ` [PATCH 02/18] mm/mempolicy: Use node_mem_id() instead of node_id() Ben Widawsky
2020-06-19 16:23 ` [PATCH 03/18] mm/page_alloc: start plumbing multi preferred node Ben Widawsky
2020-06-19 16:24 ` [PATCH 04/18] mm/page_alloc: add preferred pass to page allocation Ben Widawsky
2020-06-19 16:24 ` [PATCH 05/18] mm/mempolicy: convert single preferred_node to full nodemask Ben Widawsky
2020-06-19 16:24 ` [PATCH 06/18] mm/mempolicy: Add MPOL_PREFERRED_MANY for multiple preferred nodes Ben Widawsky
2020-06-19 16:24 ` Ben Widawsky [this message]
2020-06-19 16:24 ` [PATCH 08/18] mm/mempolicy: refactor rebind code for PREFERRED_MANY Ben Widawsky
2020-06-19 16:24 ` [PATCH 09/18] mm: Finish handling MPOL_PREFERRED_MANY Ben Widawsky
2020-06-19 16:24 ` [PATCH 10/18] mm: clean up alloc_pages_vma (thp) Ben Widawsky
2020-06-19 16:24 ` [PATCH 11/18] mm: Extract THP hugepage allocation Ben Widawsky
2020-06-19 16:24 ` [PATCH 12/18] mm/mempolicy: Use __alloc_page_node for interleaved Ben Widawsky
2020-06-19 16:24 ` [PATCH 13/18] mm: kill __alloc_pages Ben Widawsky
2020-06-19 16:25 ` [PATCH 00/18] multiple preferred nodes Ben Widawsky
2020-06-19 16:24 Ben Widawsky
2020-06-19 16:24 ` [PATCH 07/18] mm/mempolicy: allow preferred code to take a nodemask Ben Widawsky
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