* [patch 096/146] mm/mempolicy: use policy_node helper with MPOL_PREFERRED_MANY
[not found] <20220114140222.6b14f0061194d3200000c52d@linux-foundation.org>
@ 2022-01-14 22:08 ` Andrew Morton
2022-01-14 22:08 ` [patch 097/146] mm/mempolicy: add set_mempolicy_home_node syscall Andrew Morton
2022-01-14 22:08 ` [patch 098/146] mm/mempolicy: wire up syscall set_mempolicy_home_node Andrew Morton
2 siblings, 0 replies; 3+ messages in thread
From: Andrew Morton @ 2022-01-14 22:08 UTC (permalink / raw)
To: aarcange, ak, akpm, aneesh.kumar, ben.widawsky, dan.j.williams,
dave.hansen, feng.tang, linux-api, linux-mm, mgorman, mhocko,
mike.kravetz, mm-commits, rdunlap, torvalds, vbabka, ying.huang
From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Subject: mm/mempolicy: use policy_node helper with MPOL_PREFERRED_MANY
Patch series "mm: add new syscall set_mempolicy_home_node", v6.
This patch (of 3):
A followup patch will enable setting a home node with MPOL_PREFERRED_MANY
memory policy. To facilitate that switch to using policy_node helper.
There is no functional change in this patch.
Link: https://lkml.kernel.org/r/20211202123810.267175-1-aneesh.kumar@linux.ibm.com
Link: https://lkml.kernel.org/r/20211202123810.267175-2-aneesh.kumar@linux.ibm.com
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Ben Widawsky <ben.widawsky@intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Feng Tang <feng.tang@intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Huang Ying <ying.huang@intel.com>
Cc: <linux-api@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
mm/mempolicy.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- a/mm/mempolicy.c~mm-mempolicy-use-policy_node-helper-with-mpol_preferred_many
+++ a/mm/mempolicy.c
@@ -2062,7 +2062,7 @@ static struct page *alloc_pages_preferre
preferred_gfp &= ~(__GFP_DIRECT_RECLAIM | __GFP_NOFAIL);
page = __alloc_pages(preferred_gfp, order, nid, &pol->nodes);
if (!page)
- page = __alloc_pages(gfp, order, numa_node_id(), NULL);
+ page = __alloc_pages(gfp, order, nid, NULL);
return page;
}
@@ -2104,6 +2104,7 @@ struct page *alloc_pages_vma(gfp_t gfp,
}
if (pol->mode == MPOL_PREFERRED_MANY) {
+ node = policy_node(gfp, pol, node);
page = alloc_pages_preferred_many(gfp, order, node, pol);
mpol_cond_put(pol);
goto out;
@@ -2187,7 +2188,7 @@ struct page *alloc_pages(gfp_t gfp, unsi
page = alloc_page_interleave(gfp, order, interleave_nodes(pol));
else if (pol->mode == MPOL_PREFERRED_MANY)
page = alloc_pages_preferred_many(gfp, order,
- numa_node_id(), pol);
+ policy_node(gfp, pol, numa_node_id()), pol);
else
page = __alloc_pages(gfp, order,
policy_node(gfp, pol, numa_node_id()),
_
^ permalink raw reply [flat|nested] 3+ messages in thread
* [patch 097/146] mm/mempolicy: add set_mempolicy_home_node syscall
[not found] <20220114140222.6b14f0061194d3200000c52d@linux-foundation.org>
2022-01-14 22:08 ` [patch 096/146] mm/mempolicy: use policy_node helper with MPOL_PREFERRED_MANY Andrew Morton
@ 2022-01-14 22:08 ` Andrew Morton
2022-01-14 22:08 ` [patch 098/146] mm/mempolicy: wire up syscall set_mempolicy_home_node Andrew Morton
2 siblings, 0 replies; 3+ messages in thread
From: Andrew Morton @ 2022-01-14 22:08 UTC (permalink / raw)
To: aarcange, ak, akpm, aneesh.kumar, ben.widawsky, dan.j.williams,
dave.hansen, feng.tang, linux-api, linux-mm, mgorman, mhocko,
mike.kravetz, mm-commits, rdunlap, torvalds, vbabka, ying.huang
From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Subject: mm/mempolicy: add set_mempolicy_home_node syscall
This syscall can be used to set a home node for the MPOL_BIND and
MPOL_PREFERRED_MANY memory policy. Users should use this syscall after
setting up a memory policy for the specified range as shown below.
mbind(p, nr_pages * page_size, MPOL_BIND, new_nodes->maskp,
new_nodes->size + 1, 0);
sys_set_mempolicy_home_node((unsigned long)p, nr_pages * page_size,
home_node, 0);
The syscall allows specifying a home node/preferred node from which kernel
will fulfill memory allocation requests first.
For address range with MPOL_BIND memory policy, if nodemask specifies more
than one node, page allocations will come from the node in the nodemask
with sufficient free memory that is closest to the home node/preferred
node.
For MPOL_PREFERRED_MANY if the nodemask specifies more than one node, page
allocation will come from the node in the nodemask with sufficient free
memory that is closest to the home node/preferred node. If there is not
enough memory in all the nodes specified in the nodemask, the allocation
will be attempted from the closest numa node to the home node in the
system.
This helps applications to hint at a memory allocation preference node and
fallback to _only_ a set of nodes if the memory is not available on the
preferred node. Fallback allocation is attempted from the node which is
nearest to the preferred node.
This helps applications to have control on memory allocation numa nodes
and avoids default fallback to slow memory NUMA nodes. For example a
system with NUMA nodes 1,2 and 3 with DRAM memory and 10, 11 and 12 of
slow memory
new_nodes = numa_bitmask_alloc(nr_nodes);
numa_bitmask_setbit(new_nodes, 1);
numa_bitmask_setbit(new_nodes, 2);
numa_bitmask_setbit(new_nodes, 3);
p = mmap(NULL, nr_pages * page_size, protflag, mapflag, -1, 0);
mbind(p, nr_pages * page_size, MPOL_BIND, new_nodes->maskp, new_nodes->size + 1, 0);
sys_set_mempolicy_home_node(p, nr_pages * page_size, 2, 0);
This will allocate from nodes closer to node 2 and will make sure the
kernel will only allocate from nodes 1, 2, and 3. Memory will not be
allocated from slow memory nodes 10, 11, and 12. This differs from
default MPOL_BIND behavior in that with default MPOL_BIND the allocation
will be attempted from node closer to the local node. One of the reasons
to specify a home node is to allow allocations from cpu less NUMA node and
its nearby NUMA nodes.
With MPOL_PREFERRED_MANY on the other hand will first try to allocate from
the closest node to node 2 from the node list 1, 2 and 3. If those nodes
don't have enough memory, kernel will allocate from slow memory node 10,
11 and 12 which ever is closer to node 2.
Link: https://lkml.kernel.org/r/20211202123810.267175-3-aneesh.kumar@linux.ibm.com
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Ben Widawsky <ben.widawsky@intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Feng Tang <feng.tang@intel.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Huang Ying <ying.huang@intel.com>
Cc: <linux-api@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
Documentation/admin-guide/mm/numa_memory_policy.rst | 16 +-
include/linux/mempolicy.h | 1
mm/mempolicy.c | 79 ++++++++++
3 files changed, 95 insertions(+), 1 deletion(-)
--- a/Documentation/admin-guide/mm/numa_memory_policy.rst~mm-mempolicy-add-set_mempolicy_home_node-syscall
+++ a/Documentation/admin-guide/mm/numa_memory_policy.rst
@@ -408,7 +408,7 @@ follows:
Memory Policy APIs
==================
-Linux supports 3 system calls for controlling memory policy. These APIS
+Linux supports 4 system calls for controlling memory policy. These APIS
always affect only the calling task, the calling task's address space, or
some shared object mapped into the calling task's address space.
@@ -460,6 +460,20 @@ requested via the 'flags' argument.
See the mbind(2) man page for more details.
+Set home node for a Range of Task's Address Spacec::
+
+ long sys_set_mempolicy_home_node(unsigned long start, unsigned long len,
+ unsigned long home_node,
+ unsigned long flags);
+
+sys_set_mempolicy_home_node set the home node for a VMA policy present in the
+task's address range. The system call updates the home node only for the existing
+mempolicy range. Other address ranges are ignored. A home node is the NUMA node
+closest to which page allocation will come from. Specifying the home node override
+the default allocation policy to allocate memory close to the local node for an
+executing CPU.
+
+
Memory Policy Command Line Interface
====================================
--- a/include/linux/mempolicy.h~mm-mempolicy-add-set_mempolicy_home_node-syscall
+++ a/include/linux/mempolicy.h
@@ -46,6 +46,7 @@ struct mempolicy {
unsigned short mode; /* See MPOL_* above */
unsigned short flags; /* See set_mempolicy() MPOL_F_* above */
nodemask_t nodes; /* interleave/bind/perfer */
+ int home_node; /* Home node to use for MPOL_BIND and MPOL_PREFERRED_MANY */
union {
nodemask_t cpuset_mems_allowed; /* relative to these nodes */
--- a/mm/mempolicy.c~mm-mempolicy-add-set_mempolicy_home_node-syscall
+++ a/mm/mempolicy.c
@@ -296,6 +296,7 @@ static struct mempolicy *mpol_new(unsign
atomic_set(&policy->refcnt, 1);
policy->mode = mode;
policy->flags = flags;
+ policy->home_node = NUMA_NO_NODE;
return policy;
}
@@ -1478,6 +1479,77 @@ static long kernel_mbind(unsigned long s
return do_mbind(start, len, lmode, mode_flags, &nodes, flags);
}
+SYSCALL_DEFINE4(set_mempolicy_home_node, unsigned long, start, unsigned long, len,
+ unsigned long, home_node, unsigned long, flags)
+{
+ struct mm_struct *mm = current->mm;
+ struct vm_area_struct *vma;
+ struct mempolicy *new;
+ unsigned long vmstart;
+ unsigned long vmend;
+ unsigned long end;
+ int err = -ENOENT;
+
+ start = untagged_addr(start);
+ if (start & ~PAGE_MASK)
+ return -EINVAL;
+ /*
+ * flags is used for future extension if any.
+ */
+ if (flags != 0)
+ return -EINVAL;
+
+ /*
+ * Check home_node is online to avoid accessing uninitialized
+ * NODE_DATA.
+ */
+ if (home_node >= MAX_NUMNODES || !node_online(home_node))
+ return -EINVAL;
+
+ len = (len + PAGE_SIZE - 1) & PAGE_MASK;
+ end = start + len;
+
+ if (end < start)
+ return -EINVAL;
+ if (end == start)
+ return 0;
+ mmap_write_lock(mm);
+ vma = find_vma(mm, start);
+ for (; vma && vma->vm_start < end; vma = vma->vm_next) {
+
+ vmstart = max(start, vma->vm_start);
+ vmend = min(end, vma->vm_end);
+ new = mpol_dup(vma_policy(vma));
+ if (IS_ERR(new)) {
+ err = PTR_ERR(new);
+ break;
+ }
+ /*
+ * Only update home node if there is an existing vma policy
+ */
+ if (!new)
+ continue;
+
+ /*
+ * If any vma in the range got policy other than MPOL_BIND
+ * or MPOL_PREFERRED_MANY we return error. We don't reset
+ * the home node for vmas we already updated before.
+ */
+ if (new->mode != MPOL_BIND && new->mode != MPOL_PREFERRED_MANY) {
+ err = -EOPNOTSUPP;
+ break;
+ }
+
+ new->home_node = home_node;
+ err = mbind_range(mm, vmstart, vmend, new);
+ mpol_put(new);
+ if (err)
+ break;
+ }
+ mmap_write_unlock(mm);
+ return err;
+}
+
SYSCALL_DEFINE6(mbind, unsigned long, start, unsigned long, len,
unsigned long, mode, const unsigned long __user *, nmask,
unsigned long, maxnode, unsigned int, flags)
@@ -1802,6 +1874,11 @@ static int policy_node(gfp_t gfp, struct
WARN_ON_ONCE(policy->mode == MPOL_BIND && (gfp & __GFP_THISNODE));
}
+ if ((policy->mode == MPOL_BIND ||
+ policy->mode == MPOL_PREFERRED_MANY) &&
+ policy->home_node != NUMA_NO_NODE)
+ return policy->home_node;
+
return nd;
}
@@ -2344,6 +2421,8 @@ bool __mpol_equal(struct mempolicy *a, s
return false;
if (a->flags != b->flags)
return false;
+ if (a->home_node != b->home_node)
+ return false;
if (mpol_store_user_nodemask(a))
if (!nodes_equal(a->w.user_nodemask, b->w.user_nodemask))
return false;
_
^ permalink raw reply [flat|nested] 3+ messages in thread
* [patch 098/146] mm/mempolicy: wire up syscall set_mempolicy_home_node
[not found] <20220114140222.6b14f0061194d3200000c52d@linux-foundation.org>
2022-01-14 22:08 ` [patch 096/146] mm/mempolicy: use policy_node helper with MPOL_PREFERRED_MANY Andrew Morton
2022-01-14 22:08 ` [patch 097/146] mm/mempolicy: add set_mempolicy_home_node syscall Andrew Morton
@ 2022-01-14 22:08 ` Andrew Morton
2 siblings, 0 replies; 3+ messages in thread
From: Andrew Morton @ 2022-01-14 22:08 UTC (permalink / raw)
To: aarcange, ak, akpm, aneesh.kumar, ben.widawsky, dan.j.williams,
dave.hansen, feng.tang, linux-api, linux-mm, mgorman, mhocko,
mike.kravetz, mm-commits, rdunlap, torvalds, vbabka, ying.huang
From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Subject: mm/mempolicy: wire up syscall set_mempolicy_home_node
Link: https://lkml.kernel.org/r/20211202123810.267175-4-aneesh.kumar@linux.ibm.com
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Ben Widawsky <ben.widawsky@intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Feng Tang <feng.tang@intel.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Huang Ying <ying.huang@intel.com>
Cc: <linux-api@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
arch/alpha/kernel/syscalls/syscall.tbl | 1 +
arch/arm/tools/syscall.tbl | 1 +
arch/arm64/include/asm/unistd.h | 2 +-
arch/arm64/include/asm/unistd32.h | 2 ++
arch/ia64/kernel/syscalls/syscall.tbl | 1 +
arch/m68k/kernel/syscalls/syscall.tbl | 1 +
arch/microblaze/kernel/syscalls/syscall.tbl | 1 +
arch/mips/kernel/syscalls/syscall_n32.tbl | 1 +
arch/mips/kernel/syscalls/syscall_n64.tbl | 1 +
arch/mips/kernel/syscalls/syscall_o32.tbl | 1 +
arch/parisc/kernel/syscalls/syscall.tbl | 1 +
arch/powerpc/kernel/syscalls/syscall.tbl | 1 +
arch/s390/kernel/syscalls/syscall.tbl | 1 +
arch/sh/kernel/syscalls/syscall.tbl | 1 +
arch/sparc/kernel/syscalls/syscall.tbl | 1 +
arch/x86/entry/syscalls/syscall_32.tbl | 1 +
arch/x86/entry/syscalls/syscall_64.tbl | 1 +
arch/xtensa/kernel/syscalls/syscall.tbl | 1 +
include/linux/syscalls.h | 3 +++
include/uapi/asm-generic/unistd.h | 5 ++++-
kernel/sys_ni.c | 1 +
21 files changed, 27 insertions(+), 2 deletions(-)
--- a/arch/alpha/kernel/syscalls/syscall.tbl~mm-mempolicy-wire-up-syscall-set_mempolicy_home_node
+++ a/arch/alpha/kernel/syscalls/syscall.tbl
@@ -489,3 +489,4 @@
# 557 reserved for memfd_secret
558 common process_mrelease sys_process_mrelease
559 common futex_waitv sys_futex_waitv
+560 common set_mempolicy_home_node sys_ni_syscall
--- a/arch/arm64/include/asm/unistd32.h~mm-mempolicy-wire-up-syscall-set_mempolicy_home_node
+++ a/arch/arm64/include/asm/unistd32.h
@@ -905,6 +905,8 @@ __SYSCALL(__NR_landlock_restrict_self, s
__SYSCALL(__NR_process_mrelease, sys_process_mrelease)
#define __NR_futex_waitv 449
__SYSCALL(__NR_futex_waitv, sys_futex_waitv)
+#define __NR_set_mempolicy_home_node 450
+__SYSCALL(__NR_set_mempolicy_home_node, sys_set_mempolicy_home_node)
/*
* Please add new compat syscalls above this comment and update
--- a/arch/arm64/include/asm/unistd.h~mm-mempolicy-wire-up-syscall-set_mempolicy_home_node
+++ a/arch/arm64/include/asm/unistd.h
@@ -38,7 +38,7 @@
#define __ARM_NR_compat_set_tls (__ARM_NR_COMPAT_BASE + 5)
#define __ARM_NR_COMPAT_END (__ARM_NR_COMPAT_BASE + 0x800)
-#define __NR_compat_syscalls 450
+#define __NR_compat_syscalls 451
#endif
#define __ARCH_WANT_SYS_CLONE
--- a/arch/arm/tools/syscall.tbl~mm-mempolicy-wire-up-syscall-set_mempolicy_home_node
+++ a/arch/arm/tools/syscall.tbl
@@ -463,3 +463,4 @@
# 447 reserved for memfd_secret
448 common process_mrelease sys_process_mrelease
449 common futex_waitv sys_futex_waitv
+450 common set_mempolicy_home_node sys_set_mempolicy_home_node
--- a/arch/ia64/kernel/syscalls/syscall.tbl~mm-mempolicy-wire-up-syscall-set_mempolicy_home_node
+++ a/arch/ia64/kernel/syscalls/syscall.tbl
@@ -370,3 +370,4 @@
# 447 reserved for memfd_secret
448 common process_mrelease sys_process_mrelease
449 common futex_waitv sys_futex_waitv
+450 common set_mempolicy_home_node sys_set_mempolicy_home_node
--- a/arch/m68k/kernel/syscalls/syscall.tbl~mm-mempolicy-wire-up-syscall-set_mempolicy_home_node
+++ a/arch/m68k/kernel/syscalls/syscall.tbl
@@ -449,3 +449,4 @@
# 447 reserved for memfd_secret
448 common process_mrelease sys_process_mrelease
449 common futex_waitv sys_futex_waitv
+450 common set_mempolicy_home_node sys_set_mempolicy_home_node
--- a/arch/microblaze/kernel/syscalls/syscall.tbl~mm-mempolicy-wire-up-syscall-set_mempolicy_home_node
+++ a/arch/microblaze/kernel/syscalls/syscall.tbl
@@ -455,3 +455,4 @@
# 447 reserved for memfd_secret
448 common process_mrelease sys_process_mrelease
449 common futex_waitv sys_futex_waitv
+450 common set_mempolicy_home_node sys_set_mempolicy_home_node
--- a/arch/mips/kernel/syscalls/syscall_n32.tbl~mm-mempolicy-wire-up-syscall-set_mempolicy_home_node
+++ a/arch/mips/kernel/syscalls/syscall_n32.tbl
@@ -388,3 +388,4 @@
# 447 reserved for memfd_secret
448 n32 process_mrelease sys_process_mrelease
449 n32 futex_waitv sys_futex_waitv
+450 n32 set_mempolicy_home_node sys_set_mempolicy_home_node
--- a/arch/mips/kernel/syscalls/syscall_n64.tbl~mm-mempolicy-wire-up-syscall-set_mempolicy_home_node
+++ a/arch/mips/kernel/syscalls/syscall_n64.tbl
@@ -364,3 +364,4 @@
# 447 reserved for memfd_secret
448 n64 process_mrelease sys_process_mrelease
449 n64 futex_waitv sys_futex_waitv
+450 common set_mempolicy_home_node sys_set_mempolicy_home_node
--- a/arch/mips/kernel/syscalls/syscall_o32.tbl~mm-mempolicy-wire-up-syscall-set_mempolicy_home_node
+++ a/arch/mips/kernel/syscalls/syscall_o32.tbl
@@ -437,3 +437,4 @@
# 447 reserved for memfd_secret
448 o32 process_mrelease sys_process_mrelease
449 o32 futex_waitv sys_futex_waitv
+450 o32 set_mempolicy_home_node sys_set_mempolicy_home_node
--- a/arch/parisc/kernel/syscalls/syscall.tbl~mm-mempolicy-wire-up-syscall-set_mempolicy_home_node
+++ a/arch/parisc/kernel/syscalls/syscall.tbl
@@ -447,3 +447,4 @@
# 447 reserved for memfd_secret
448 common process_mrelease sys_process_mrelease
449 common futex_waitv sys_futex_waitv
+450 common set_mempolicy_home_node sys_set_mempolicy_home_node
--- a/arch/powerpc/kernel/syscalls/syscall.tbl~mm-mempolicy-wire-up-syscall-set_mempolicy_home_node
+++ a/arch/powerpc/kernel/syscalls/syscall.tbl
@@ -529,3 +529,4 @@
# 447 reserved for memfd_secret
448 common process_mrelease sys_process_mrelease
449 common futex_waitv sys_futex_waitv
+450 nospu set_mempolicy_home_node sys_set_mempolicy_home_node
--- a/arch/s390/kernel/syscalls/syscall.tbl~mm-mempolicy-wire-up-syscall-set_mempolicy_home_node
+++ a/arch/s390/kernel/syscalls/syscall.tbl
@@ -452,3 +452,4 @@
# 447 reserved for memfd_secret
448 common process_mrelease sys_process_mrelease sys_process_mrelease
449 common futex_waitv sys_futex_waitv sys_futex_waitv
+450 common set_mempolicy_home_node sys_set_mempolicy_home_node sys_set_mempolicy_home_node
--- a/arch/sh/kernel/syscalls/syscall.tbl~mm-mempolicy-wire-up-syscall-set_mempolicy_home_node
+++ a/arch/sh/kernel/syscalls/syscall.tbl
@@ -452,3 +452,4 @@
# 447 reserved for memfd_secret
448 common process_mrelease sys_process_mrelease
449 common futex_waitv sys_futex_waitv
+450 common set_mempolicy_home_node sys_set_mempolicy_home_node
--- a/arch/sparc/kernel/syscalls/syscall.tbl~mm-mempolicy-wire-up-syscall-set_mempolicy_home_node
+++ a/arch/sparc/kernel/syscalls/syscall.tbl
@@ -495,3 +495,4 @@
# 447 reserved for memfd_secret
448 common process_mrelease sys_process_mrelease
449 common futex_waitv sys_futex_waitv
+450 common set_mempolicy_home_node sys_set_mempolicy_home_node
--- a/arch/x86/entry/syscalls/syscall_32.tbl~mm-mempolicy-wire-up-syscall-set_mempolicy_home_node
+++ a/arch/x86/entry/syscalls/syscall_32.tbl
@@ -454,3 +454,4 @@
447 i386 memfd_secret sys_memfd_secret
448 i386 process_mrelease sys_process_mrelease
449 i386 futex_waitv sys_futex_waitv
+450 i386 set_mempolicy_home_node sys_set_mempolicy_home_node
--- a/arch/x86/entry/syscalls/syscall_64.tbl~mm-mempolicy-wire-up-syscall-set_mempolicy_home_node
+++ a/arch/x86/entry/syscalls/syscall_64.tbl
@@ -371,6 +371,7 @@
447 common memfd_secret sys_memfd_secret
448 common process_mrelease sys_process_mrelease
449 common futex_waitv sys_futex_waitv
+450 common set_mempolicy_home_node sys_set_mempolicy_home_node
#
# Due to a historical design error, certain syscalls are numbered differently
--- a/arch/xtensa/kernel/syscalls/syscall.tbl~mm-mempolicy-wire-up-syscall-set_mempolicy_home_node
+++ a/arch/xtensa/kernel/syscalls/syscall.tbl
@@ -420,3 +420,4 @@
# 447 reserved for memfd_secret
448 common process_mrelease sys_process_mrelease
449 common futex_waitv sys_futex_waitv
+450 common set_mempolicy_home_node sys_set_mempolicy_home_node
--- a/include/linux/syscalls.h~mm-mempolicy-wire-up-syscall-set_mempolicy_home_node
+++ a/include/linux/syscalls.h
@@ -1057,6 +1057,9 @@ asmlinkage long sys_landlock_add_rule(in
const void __user *rule_attr, __u32 flags);
asmlinkage long sys_landlock_restrict_self(int ruleset_fd, __u32 flags);
asmlinkage long sys_memfd_secret(unsigned int flags);
+asmlinkage long sys_set_mempolicy_home_node(unsigned long start, unsigned long len,
+ unsigned long home_node,
+ unsigned long flags);
/*
* Architecture-specific system calls
--- a/include/uapi/asm-generic/unistd.h~mm-mempolicy-wire-up-syscall-set_mempolicy_home_node
+++ a/include/uapi/asm-generic/unistd.h
@@ -883,8 +883,11 @@ __SYSCALL(__NR_process_mrelease, sys_pro
#define __NR_futex_waitv 449
__SYSCALL(__NR_futex_waitv, sys_futex_waitv)
+#define __NR_set_mempolicy_home_node 450
+__SYSCALL(__NR_set_mempolicy_home_node, sys_set_mempolicy_home_node)
+
#undef __NR_syscalls
-#define __NR_syscalls 450
+#define __NR_syscalls 451
/*
* 32 bit systems traditionally used different
--- a/kernel/sys_ni.c~mm-mempolicy-wire-up-syscall-set_mempolicy_home_node
+++ a/kernel/sys_ni.c
@@ -297,6 +297,7 @@ COND_SYSCALL(get_mempolicy);
COND_SYSCALL(set_mempolicy);
COND_SYSCALL(migrate_pages);
COND_SYSCALL(move_pages);
+COND_SYSCALL(set_mempolicy_home_node);
COND_SYSCALL(perf_event_open);
COND_SYSCALL(accept4);
_
^ permalink raw reply [flat|nested] 3+ messages in thread
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[not found] <20220114140222.6b14f0061194d3200000c52d@linux-foundation.org>
2022-01-14 22:08 ` [patch 096/146] mm/mempolicy: use policy_node helper with MPOL_PREFERRED_MANY Andrew Morton
2022-01-14 22:08 ` [patch 097/146] mm/mempolicy: add set_mempolicy_home_node syscall Andrew Morton
2022-01-14 22:08 ` [patch 098/146] mm/mempolicy: wire up syscall set_mempolicy_home_node Andrew Morton
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