From: Feng Tang <feng.tang@intel.com>
To: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>
Cc: Michal Hocko <mhocko@kernel.org>,
Andrea Arcangeli <aarcange@redhat.com>,
David Rientjes <rientjes@google.com>,
Mel Gorman <mgorman@techsingularity.net>,
Mike Kravetz <mike.kravetz@oracle.com>,
Randy Dunlap <rdunlap@infradead.org>,
Vlastimil Babka <vbabka@suse.cz>,
Dave Hansen <dave.hansen@intel.com>,
Ben Widawsky <ben.widawsky@intel.com>,
Andi Kleen <ak@linux.intel.com>,
Dan Williams <dan.j.williams@intel.com>,
Feng Tang <feng.tang@intel.com>
Subject: [PATCH v4 13/13] mem/mempolicy: unify mpol_new_preferred() and mpol_new_preferred_many()
Date: Wed, 17 Mar 2021 11:40:10 +0800 [thread overview]
Message-ID: <1615952410-36895-14-git-send-email-feng.tang@intel.com> (raw)
In-Reply-To: <1615952410-36895-1-git-send-email-feng.tang@intel.com>
To reduce some code duplication.
Signed-off-by: Feng Tang <feng.tang@intel.com>
---
mm/mempolicy.c | 25 +++++++------------------
1 file changed, 7 insertions(+), 18 deletions(-)
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 18aa7dc..ee99ecc 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -201,32 +201,21 @@ static int mpol_new_interleave(struct mempolicy *pol, const nodemask_t *nodes)
return 0;
}
-static int mpol_new_preferred_many(struct mempolicy *pol,
+/* cover both MPOL_PREFERRED and MPOL_PREFERRED_MANY */
+static int mpol_new_preferred(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->nodes = *nodes;
- return 0;
-}
-
-static int mpol_new_preferred(struct mempolicy *pol, const nodemask_t *nodes)
-{
- if (nodes) {
+ else {
/* MPOL_PREFERRED can only take a single node: */
- nodemask_t tmp;
+ nodemask_t tmp = nodemask_of_node(first_node(*nodes));
- if (nodes_empty(*nodes))
- return -EINVAL;
-
- tmp = nodemask_of_node(first_node(*nodes));
- return mpol_new_preferred_many(pol, &tmp);
+ pol->nodes = (pol->mode == MPOL_PREFERRED) ? tmp : *nodes;
}
-
- return mpol_new_preferred_many(pol, NULL);
+ return 0;
}
static int mpol_new_bind(struct mempolicy *pol, const nodemask_t *nodes)
@@ -468,7 +457,7 @@ static const struct mempolicy_operations mpol_ops[MPOL_MAX] = {
},
/* [MPOL_LOCAL] - see mpol_new() */
[MPOL_PREFERRED_MANY] = {
- .create = mpol_new_preferred_many,
+ .create = mpol_new_preferred,
.rebind = mpol_rebind_preferred_many,
},
};
--
2.7.4
next prev parent reply other threads:[~2021-03-17 3:41 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-17 3:39 [PATCH v4 00/13] Introduced multi-preference mempolicy Feng Tang
2021-03-17 3:39 ` [PATCH v4 01/13] mm/mempolicy: Add comment for missing LOCAL Feng Tang
2021-03-17 3:39 ` [PATCH v4 02/13] mm/mempolicy: convert single preferred_node to full nodemask Feng Tang
2021-04-14 12:17 ` Michal Hocko
2021-03-17 3:40 ` [PATCH v4 03/13] mm/mempolicy: Add MPOL_PREFERRED_MANY for multiple preferred nodes Feng Tang
2021-04-14 12:50 ` Michal Hocko
2021-04-20 7:16 ` Feng Tang
2021-05-13 7:23 ` Feng Tang
2021-05-13 7:25 ` [RFC PATCH 2/2] mempolicy: kill MPOL_F_LOCAL bit Feng Tang
2021-05-13 13:55 ` Andi Kleen
2021-03-17 3:40 ` [PATCH v4 04/13] mm/mempolicy: allow preferred code to take a nodemask Feng Tang
2021-04-14 12:55 ` Michal Hocko
2021-04-19 8:49 ` Feng Tang
2021-03-17 3:40 ` [PATCH v4 05/13] mm/mempolicy: refactor rebind code for PREFERRED_MANY Feng Tang
2021-04-14 12:57 ` Michal Hocko
2021-03-17 3:40 ` [PATCH v4 06/13] mm/mempolicy: kill v.preferred_nodes Feng Tang
2021-04-14 12:58 ` Michal Hocko
2021-03-17 3:40 ` [PATCH v4 07/13] mm/mempolicy: handle MPOL_PREFERRED_MANY like BIND Feng Tang
2021-04-14 13:01 ` Michal Hocko
2021-03-17 3:40 ` [PATCH v4 08/13] mm/mempolicy: Create a page allocator for policy Feng Tang
2021-04-14 13:08 ` Michal Hocko
2021-04-15 8:17 ` Feng Tang
2021-03-17 3:40 ` [PATCH v4 09/13] mm/mempolicy: Thread allocation for many preferred Feng Tang
2021-03-17 3:40 ` [PATCH v4 10/13] mm/mempolicy: VMA " Feng Tang
2021-04-14 13:14 ` Michal Hocko
2021-03-17 3:40 ` [PATCH v4 11/13] mm/mempolicy: huge-page " Feng Tang
2021-03-17 7:19 ` kernel test robot
2021-03-17 7:19 ` kernel test robot
2021-04-14 13:25 ` Michal Hocko
2021-04-15 7:41 ` Feng Tang
2021-03-17 3:40 ` [PATCH v4 12/13] mm/mempolicy: Advertise new MPOL_PREFERRED_MANY Feng Tang
2021-03-17 3:40 ` Feng Tang [this message]
2021-04-14 11:21 ` [PATCH v4 00/13] Introduced multi-preference mempolicy Michal Hocko
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