mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-28 09:39:00 +00:00
538a1d740c
The patches were generated from the RPi repo with the following command: git format-patch v6.6.58..rpi-6.6.y Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
116 lines
2.8 KiB
Diff
116 lines
2.8 KiB
Diff
From 4bbdd9335a4784743a5ac30697f24972219559c2 Mon Sep 17 00:00:00 2001
|
|
From: Tvrtko Ursulin <tvrtko.ursulin@igalia.com>
|
|
Date: Wed, 22 May 2024 17:12:16 +0100
|
|
Subject: [PATCH 1340/1350] mm/numa: Allow override of kernel's default NUMA
|
|
policy
|
|
|
|
Add numa_policy kernel argument to allow overriding the kernel's default
|
|
NUMA policy at boot time.
|
|
|
|
Syntax identical to what tmpfs accepts as it's mpol argument is accepted.
|
|
|
|
Some examples:
|
|
|
|
numa_policy=interleave
|
|
numa_policy=interleave=skip-interleave
|
|
numa_policy=bind:0-3,5,7,9-15
|
|
numa_policy=bind=static:1-2
|
|
|
|
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@igalia.com>
|
|
---
|
|
mm/mempolicy.c | 49 ++++++++++++++++++++++++++++++++++++++++++-------
|
|
1 file changed, 42 insertions(+), 7 deletions(-)
|
|
|
|
--- a/mm/mempolicy.c
|
|
+++ b/mm/mempolicy.c
|
|
@@ -2974,7 +2974,9 @@ void __init numa_policy_init(void)
|
|
/* Reset policy of current process to default */
|
|
void numa_default_policy(void)
|
|
{
|
|
- do_set_mempolicy(MPOL_DEFAULT, 0, NULL);
|
|
+ struct mempolicy *pol = &default_policy;
|
|
+
|
|
+ do_set_mempolicy(pol->mode, pol->flags, &pol->nodes);
|
|
}
|
|
|
|
/*
|
|
@@ -2992,7 +2994,6 @@ static const char * const policy_modes[]
|
|
};
|
|
|
|
|
|
-#ifdef CONFIG_TMPFS
|
|
/**
|
|
* mpol_parse_str - parse string to mempolicy, for tmpfs mpol mount option.
|
|
* @str: string containing mempolicy to parse
|
|
@@ -3005,13 +3006,18 @@ static const char * const policy_modes[]
|
|
*/
|
|
int mpol_parse_str(char *str, struct mempolicy **mpol)
|
|
{
|
|
- struct mempolicy *new = NULL;
|
|
+ struct mempolicy *new;
|
|
unsigned short mode_flags;
|
|
nodemask_t nodes;
|
|
char *nodelist = strchr(str, ':');
|
|
char *flags = strchr(str, '=');
|
|
int err = 1, mode;
|
|
|
|
+ if (*mpol)
|
|
+ new = *mpol;
|
|
+ else
|
|
+ new = NULL;
|
|
+
|
|
if (flags)
|
|
*flags++ = '\0'; /* terminate mode string */
|
|
|
|
@@ -3090,9 +3096,16 @@ int mpol_parse_str(char *str, struct mem
|
|
goto out;
|
|
}
|
|
|
|
- new = mpol_new(mode, mode_flags, &nodes);
|
|
- if (IS_ERR(new))
|
|
- goto out;
|
|
+ if (!new) {
|
|
+ new = mpol_new(mode, mode_flags, &nodes);
|
|
+ if (IS_ERR(new))
|
|
+ goto out;
|
|
+ } else {
|
|
+ atomic_set(&new->refcnt, 1);
|
|
+ new->mode = mode;
|
|
+ new->flags = mode_flags;
|
|
+ new->home_node = NUMA_NO_NODE;
|
|
+ }
|
|
|
|
/*
|
|
* Save nodes for mpol_to_str() to show the tmpfs mount options
|
|
@@ -3125,7 +3138,29 @@ out:
|
|
*mpol = new;
|
|
return err;
|
|
}
|
|
-#endif /* CONFIG_TMPFS */
|
|
+
|
|
+static int __init setup_numapolicy(char *str)
|
|
+{
|
|
+ struct mempolicy pol = { }, *ppol = &pol;
|
|
+ char buf[128];
|
|
+ int ret;
|
|
+
|
|
+ if (str)
|
|
+ ret = mpol_parse_str(str, &ppol);
|
|
+ else
|
|
+ ret = -EINVAL;
|
|
+
|
|
+ if (!ret) {
|
|
+ default_policy = pol;
|
|
+ mpol_to_str(buf, sizeof(buf), &pol);
|
|
+ pr_info("NUMA default policy overridden to '%s'\n", buf);
|
|
+ } else {
|
|
+ pr_warn("Unable to parse numa_policy=\n");
|
|
+ }
|
|
+
|
|
+ return ret == 0;
|
|
+}
|
|
+__setup("numa_policy=", setup_numapolicy);
|
|
|
|
/**
|
|
* mpol_to_str - format a mempolicy structure for printing
|