From: Ben Widawsky <ben.widawsky@intel.com>
To: linux-mm <linux-mm@kvack.org>, Andrew Morton <akpm@linux-foundation.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>,
Dave Hansen <dave.hansen@intel.com>,
Michal Hocko <mhocko@kernel.org>,
Ben Widawsky <ben.widawsky@intel.com>,
linux-kernel@vger.kernel.org
Subject: [PATCH 05/12] mm/mempolicy: refactor rebind code for PREFERRED_MANY
Date: Fri, 30 Oct 2020 12:02:31 -0700 [thread overview]
Message-ID: <20201030190238.306764-6-ben.widawsky@intel.com> (raw)
In-Reply-To: <20201030190238.306764-1-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)
Link: https://lore.kernel.org/r/20200630212517.308045-6-ben.widawsky@intel.com
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 b1b43e511d6f..1b88c133f5c5 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
*
--
2.29.2
next prev parent reply other threads:[~2020-10-30 19:03 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-30 19:02 [PATCH v2 RESEND 00/12] Introduced multi-preference mempolicy Ben Widawsky
2020-10-30 19:02 ` [PATCH 01/12] mm/mempolicy: Add comment for missing LOCAL Ben Widawsky
2020-10-30 19:02 ` [PATCH 02/12] mm/mempolicy: convert single preferred_node to full nodemask Ben Widawsky
2020-10-30 19:02 ` [PATCH 03/12] mm/mempolicy: Add MPOL_PREFERRED_MANY for multiple preferred nodes Ben Widawsky
2020-10-30 19:02 ` [PATCH 04/12] mm/mempolicy: allow preferred code to take a nodemask Ben Widawsky
2021-01-03 13:34 ` [mm/mempolicy] 5ef9c2a53c: Kernel_panic-not_syncing:stack-protector:Kernel_stack_is_corrupted_in:mpol_new_preferred kernel test robot
2021-01-03 13:34 ` kernel test robot
2020-10-30 19:02 ` Ben Widawsky [this message]
2020-10-30 19:02 ` [PATCH 06/12] mm/mempolicy: kill v.preferred_nodes Ben Widawsky
2020-10-30 19:02 ` [PATCH 07/12] mm/mempolicy: handle MPOL_PREFERRED_MANY like BIND Ben Widawsky
2020-10-30 19:02 ` [PATCH 08/12] mm/mempolicy: Create a page allocator for policy Ben Widawsky
2020-10-30 19:02 ` [PATCH 09/12] mm/mempolicy: Thread allocation for many preferred Ben Widawsky
2020-10-30 19:02 ` [PATCH 10/12] mm/mempolicy: VMA " Ben Widawsky
2020-10-30 19:02 ` [PATCH 11/12] mm/mempolicy: huge-page " Ben Widawsky
2020-10-30 19:02 ` [PATCH 12/12] mm/mempolicy: Advertise new MPOL_PREFERRED_MANY Ben Widawsky
-- strict thread matches above, loose matches on Subject: below --
2020-06-30 21:25 [PATCH v2 00/12] Introduced multi-preference mempolicy Ben Widawsky
2020-06-30 21:25 ` [PATCH 05/12] mm/mempolicy: refactor rebind code for PREFERRED_MANY Ben Widawsky
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