From: Ben Widawsky <ben.widawsky@intel.com>
To: linux-mm <linux-mm@kvack.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>,
Ben Widawsky <ben.widawsky@intel.com>
Subject: [PATCH 08/18] mm/mempolicy: refactor rebind code for PREFERRED_MANY
Date: Fri, 19 Jun 2020 09:24:15 -0700 [thread overview]
Message-ID: <20200619162425.1052382-9-ben.widawsky@intel.com> (raw)
In-Reply-To: <20200619162425.1052382-1-ben.widawsky@intel.com>
From: Dave Hansen <dave.hansen@linux.intel.com>
Again, this extracts the "only one node must be set" behavior of
MPOL_PREFERRED. It retains virtually all of the existing code so it can
be used by MPOL_PREFERRED_MANY as well.
v2:
Fixed typos in commit message. (Ben)
Merged bits from other patches. (Ben)
annotate mpol_rebind_preferred_many as unused (Ben)
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Ben Widawsky <ben.widawsky@intel.com>
---
mm/mempolicy.c | 29 ++++++++++++++++++++++-------
1 file changed, 22 insertions(+), 7 deletions(-)
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 541675a5b947..bfc4ef2af90d 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -359,14 +359,11 @@ static void mpol_rebind_nodemask(struct mempolicy *pol, const nodemask_t *nodes)
pol->v.nodes = tmp;
}
-static void mpol_rebind_preferred(struct mempolicy *pol,
- const nodemask_t *nodes)
+static void mpol_rebind_preferred_common(struct mempolicy *pol,
+ const nodemask_t *preferred_nodes,
+ const nodemask_t *nodes)
{
nodemask_t tmp;
- nodemask_t preferred_node;
-
- /* MPOL_PREFERRED uses only the first node in the mask */
- preferred_node = nodemask_of_node(first_node(*nodes));
if (pol->flags & MPOL_F_STATIC_NODES) {
int node = first_node(pol->w.user_nodemask);
@@ -381,12 +378,30 @@ static void mpol_rebind_preferred(struct mempolicy *pol,
pol->v.preferred_nodes = tmp;
} else if (!(pol->flags & MPOL_F_LOCAL)) {
nodes_remap(tmp, pol->v.preferred_nodes,
- pol->w.cpuset_mems_allowed, preferred_node);
+ pol->w.cpuset_mems_allowed, *preferred_nodes);
pol->v.preferred_nodes = tmp;
pol->w.cpuset_mems_allowed = *nodes;
}
}
+/* MPOL_PREFERRED_MANY allows multiple nodes to be set in 'nodes' */
+static void __maybe_unused mpol_rebind_preferred_many(struct mempolicy *pol,
+ const nodemask_t *nodes)
+{
+ mpol_rebind_preferred_common(pol, nodes, nodes);
+}
+
+static void mpol_rebind_preferred(struct mempolicy *pol,
+ const nodemask_t *nodes)
+{
+ nodemask_t preferred_node;
+
+ /* MPOL_PREFERRED uses only the first node in 'nodes' */
+ preferred_node = nodemask_of_node(first_node(*nodes));
+
+ mpol_rebind_preferred_common(pol, &preferred_node, nodes);
+}
+
/*
* mpol_rebind_policy - Migrate a policy to a different set of nodes
*
--
2.27.0
next prev parent reply other threads:[~2020-06-19 16:25 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-19 16:24 [PATCH 00/18] multiple preferred nodes Ben Widawsky
2020-06-19 16:24 ` [PATCH 01/18] mm/mempolicy: Add comment for missing LOCAL Ben Widawsky
2020-06-24 7:55 ` Michal Hocko
2020-06-19 16:24 ` [PATCH 02/18] mm/mempolicy: Use node_mem_id() instead of node_id() Ben Widawsky
2020-06-24 8:25 ` Michal Hocko
2020-06-24 16:48 ` Ben Widawsky
2020-06-26 12:30 ` Michal Hocko
2020-06-19 16:24 ` [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 ` [PATCH 07/18] mm/mempolicy: allow preferred code to take a nodemask Ben Widawsky
2020-06-19 16:24 ` Ben Widawsky [this message]
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 16:24 ` [PATCH 14/18] mm/mempolicy: Introduce policy_preferred_nodes() Ben Widawsky
2020-06-19 16:24 ` [PATCH 15/18] mm: convert callers of __alloc_pages_nodemask to pmask Ben Widawsky
2020-06-19 16:24 ` [PATCH 16/18] alloc_pages_nodemask: turn preferred nid into a nodemask Ben Widawsky
2020-06-19 16:24 ` [PATCH 17/18] mm: Use less stack for page allocations Ben Widawsky
2020-06-19 16:24 ` [PATCH 18/18] mm/mempolicy: Advertise new MPOL_PREFERRED_MANY Ben Widawsky
2020-06-22 7:09 ` [PATCH 00/18] multiple preferred nodes Michal Hocko
2020-06-23 11:20 ` Michal Hocko
2020-06-23 16:12 ` Ben Widawsky
2020-06-24 7:52 ` Michal Hocko
2020-06-24 16:16 ` Ben Widawsky
2020-06-24 18:39 ` Michal Hocko
2020-06-24 19:37 ` Ben Widawsky
2020-06-24 19:51 ` Michal Hocko
2020-06-24 20:01 ` Ben Widawsky
2020-06-24 20:07 ` Michal Hocko
2020-06-24 20:23 ` Ben Widawsky
2020-06-24 20:42 ` Michal Hocko
2020-06-24 20:55 ` Ben Widawsky
2020-06-25 6:28 ` Michal Hocko
2020-06-26 21:39 ` Ben Widawsky
2020-06-29 10:16 ` Michal Hocko
2020-06-22 20:54 ` Andi Kleen
2020-06-22 21:02 ` Ben Widawsky
2020-06-22 21:07 ` Dave Hansen
2020-06-22 22:02 ` Andi Kleen
-- strict thread matches above, loose matches on Subject: below --
2020-06-19 16:23 Ben Widawsky
2020-06-19 16:24 ` [PATCH 08/18] mm/mempolicy: refactor rebind code for PREFERRED_MANY Ben Widawsky
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