* [PATCH v3 1/3] mm/mempolicy: use policy_node helper with MPOL_PREFERRED_MANY
[not found] <20211028085701.505593-1-aneesh.kumar@linux.ibm.com>
@ 2021-10-28 8:56 ` Aneesh Kumar K.V
2021-10-28 8:57 ` [PATCH v3 2/3] mm/mempolicy: add set_mempolicy_home_node syscall Aneesh Kumar K.V
2021-10-28 8:57 ` [PATCH v3 3/3] mm/mempolicy: wire up syscall set_mempolicy_home_node Aneesh Kumar K.V
2 siblings, 0 replies; 3+ messages in thread
From: Aneesh Kumar K.V @ 2021-10-28 8:56 UTC (permalink / raw)
To: linux-mm
Cc: akpm, Aneesh Kumar K.V, Ben Widawsky, Dave Hansen, Feng Tang,
Michal Hocko, Andrea Arcangeli, Mel Gorman, Mike Kravetz,
Randy Dunlap, Vlastimil Babka, Andi Kleen, Dan Williams,
Huang Ying, linux-api
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.
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: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
---
mm/mempolicy.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index d12e0608fced..35a0e72c74a3 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -2061,7 +2061,7 @@ static struct page *alloc_pages_preferred_many(gfp_t gfp, unsigned int order,
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;
}
@@ -2102,6 +2102,7 @@ struct page *alloc_pages_vma(gfp_t gfp, int order, struct vm_area_struct *vma,
}
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;
@@ -2186,7 +2187,7 @@ struct page *alloc_pages(gfp_t gfp, unsigned order)
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()),
--
2.31.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* [PATCH v3 2/3] mm/mempolicy: add set_mempolicy_home_node syscall
[not found] <20211028085701.505593-1-aneesh.kumar@linux.ibm.com>
2021-10-28 8:56 ` [PATCH v3 1/3] mm/mempolicy: use policy_node helper with MPOL_PREFERRED_MANY Aneesh Kumar K.V
@ 2021-10-28 8:57 ` Aneesh Kumar K.V
2021-10-28 8:57 ` [PATCH v3 3/3] mm/mempolicy: wire up syscall set_mempolicy_home_node Aneesh Kumar K.V
2 siblings, 0 replies; 3+ messages in thread
From: Aneesh Kumar K.V @ 2021-10-28 8:57 UTC (permalink / raw)
To: linux-mm
Cc: akpm, Aneesh Kumar K.V, Ben Widawsky, Dave Hansen, Feng Tang,
Michal Hocko, Andrea Arcangeli, Mel Gorman, Mike Kravetz,
Randy Dunlap, Vlastimil Babka, Andi Kleen, Dan Williams,
Huang Ying, linux-api
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 kernel will
only allocate from nodes 1, 2 and3. Memory will not be allocated from slow memory
nodes 10, 11 and 12
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.
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: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
---
.../admin-guide/mm/numa_memory_policy.rst | 14 ++++-
include/linux/mempolicy.h | 1 +
mm/mempolicy.c | 54 +++++++++++++++++++
3 files changed, 68 insertions(+), 1 deletion(-)
diff --git a/Documentation/admin-guide/mm/numa_memory_policy.rst b/Documentation/admin-guide/mm/numa_memory_policy.rst
index 64fd0ba0d057..6eab52d4c3b2 100644
--- a/Documentation/admin-guide/mm/numa_memory_policy.rst
+++ b/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 +460,18 @@ 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.
+
+
Memory Policy Command Line Interface
====================================
diff --git a/include/linux/mempolicy.h b/include/linux/mempolicy.h
index 4091692bed8c..7a224d11bdd0 100644
--- a/include/linux/mempolicy.h
+++ b/include/linux/mempolicy.h
@@ -47,6 +47,7 @@ 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 */
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 35a0e72c74a3..dfb760d30e7d 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -296,6 +296,7 @@ static struct mempolicy *mpol_new(unsigned short mode, unsigned short flags,
atomic_set(&policy->refcnt, 1);
policy->mode = mode;
policy->flags = flags;
+ policy->home_node = NUMA_NO_NODE;
return policy;
}
@@ -1477,6 +1478,52 @@ static long kernel_mbind(unsigned long start, unsigned long len,
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;
+
+ if (start & ~PAGE_MASK)
+ 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;
+ new->home_node = home_node;
+ err = mbind_range(mm, vmstart, vmend, 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)
@@ -1801,6 +1848,11 @@ static int policy_node(gfp_t gfp, struct mempolicy *policy, int nd)
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;
}
@@ -2251,6 +2303,8 @@ bool __mpol_equal(struct mempolicy *a, struct mempolicy *b)
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;
--
2.31.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* [PATCH v3 3/3] mm/mempolicy: wire up syscall set_mempolicy_home_node
[not found] <20211028085701.505593-1-aneesh.kumar@linux.ibm.com>
2021-10-28 8:56 ` [PATCH v3 1/3] mm/mempolicy: use policy_node helper with MPOL_PREFERRED_MANY Aneesh Kumar K.V
2021-10-28 8:57 ` [PATCH v3 2/3] mm/mempolicy: add set_mempolicy_home_node syscall Aneesh Kumar K.V
@ 2021-10-28 8:57 ` Aneesh Kumar K.V
2 siblings, 0 replies; 3+ messages in thread
From: Aneesh Kumar K.V @ 2021-10-28 8:57 UTC (permalink / raw)
To: linux-mm
Cc: akpm, Aneesh Kumar K.V, Ben Widawsky, Dave Hansen, Feng Tang,
Michal Hocko, Andrea Arcangeli, Mel Gorman, Mike Kravetz,
Randy Dunlap, Vlastimil Babka, Andi Kleen, Dan Williams,
Huang Ying, linux-api
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: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
---
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 | 4 +++-
kernel/sys_ni.c | 1 +
21 files changed, 26 insertions(+), 2 deletions(-)
diff --git a/arch/alpha/kernel/syscalls/syscall.tbl b/arch/alpha/kernel/syscalls/syscall.tbl
index e4a041cd5715..62b01f28ca3e 100644
--- a/arch/alpha/kernel/syscalls/syscall.tbl
+++ b/arch/alpha/kernel/syscalls/syscall.tbl
@@ -488,3 +488,4 @@
556 common landlock_restrict_self sys_landlock_restrict_self
# 557 reserved for memfd_secret
558 common process_mrelease sys_process_mrelease
+559 common set_mempolicy_home_node sys_ni_syscall
diff --git a/arch/arm/tools/syscall.tbl b/arch/arm/tools/syscall.tbl
index e842209e135d..654d36611510 100644
--- a/arch/arm/tools/syscall.tbl
+++ b/arch/arm/tools/syscall.tbl
@@ -462,3 +462,4 @@
446 common landlock_restrict_self sys_landlock_restrict_self
# 447 reserved for memfd_secret
448 common process_mrelease sys_process_mrelease
+449 common set_mempolicy_home_node sys_set_mempolicy_home_node
diff --git a/arch/arm64/include/asm/unistd.h b/arch/arm64/include/asm/unistd.h
index 3cb206aea3db..6bdb5f5db438 100644
--- a/arch/arm64/include/asm/unistd.h
+++ b/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 449
+#define __NR_compat_syscalls 450
#endif
#define __ARCH_WANT_SYS_CLONE
diff --git a/arch/arm64/include/asm/unistd32.h b/arch/arm64/include/asm/unistd32.h
index 844f6ae58662..83dc8cc5040c 100644
--- a/arch/arm64/include/asm/unistd32.h
+++ b/arch/arm64/include/asm/unistd32.h
@@ -903,6 +903,8 @@ __SYSCALL(__NR_landlock_add_rule, sys_landlock_add_rule)
__SYSCALL(__NR_landlock_restrict_self, sys_landlock_restrict_self)
#define __NR_process_mrelease 448
__SYSCALL(__NR_process_mrelease, sys_process_mrelease)
+#define __NR_set_mempolicy_home_node 449
+__SYSCALL(__NR_set_mempolicy_home_node, sys_set_mempolicy_home_node)
/*
* Please add new compat syscalls above this comment and update
diff --git a/arch/ia64/kernel/syscalls/syscall.tbl b/arch/ia64/kernel/syscalls/syscall.tbl
index 6fea1844fb95..c283e041ac2f 100644
--- a/arch/ia64/kernel/syscalls/syscall.tbl
+++ b/arch/ia64/kernel/syscalls/syscall.tbl
@@ -369,3 +369,4 @@
446 common landlock_restrict_self sys_landlock_restrict_self
# 447 reserved for memfd_secret
448 common process_mrelease sys_process_mrelease
+449 common set_mempolicy_home_node sys_set_mempolicy_home_node
diff --git a/arch/m68k/kernel/syscalls/syscall.tbl b/arch/m68k/kernel/syscalls/syscall.tbl
index 7976dff8f879..1306b416ab7f 100644
--- a/arch/m68k/kernel/syscalls/syscall.tbl
+++ b/arch/m68k/kernel/syscalls/syscall.tbl
@@ -448,3 +448,4 @@
446 common landlock_restrict_self sys_landlock_restrict_self
# 447 reserved for memfd_secret
448 common process_mrelease sys_process_mrelease
+449 common set_mempolicy_home_node sys_set_mempolicy_home_node
diff --git a/arch/microblaze/kernel/syscalls/syscall.tbl b/arch/microblaze/kernel/syscalls/syscall.tbl
index 6b0e11362bd2..013c5c84f90c 100644
--- a/arch/microblaze/kernel/syscalls/syscall.tbl
+++ b/arch/microblaze/kernel/syscalls/syscall.tbl
@@ -454,3 +454,4 @@
446 common landlock_restrict_self sys_landlock_restrict_self
# 447 reserved for memfd_secret
448 common process_mrelease sys_process_mrelease
+449 common set_mempolicy_home_node sys_set_mempolicy_home_node
diff --git a/arch/mips/kernel/syscalls/syscall_n32.tbl b/arch/mips/kernel/syscalls/syscall_n32.tbl
index 70e32de2bcaa..fa8fe5553c66 100644
--- a/arch/mips/kernel/syscalls/syscall_n32.tbl
+++ b/arch/mips/kernel/syscalls/syscall_n32.tbl
@@ -387,3 +387,4 @@
446 n32 landlock_restrict_self sys_landlock_restrict_self
# 447 reserved for memfd_secret
448 n32 process_mrelease sys_process_mrelease
+449 n32 set_mempolicy_home_node sys_set_mempolicy_home_node
diff --git a/arch/mips/kernel/syscalls/syscall_n64.tbl b/arch/mips/kernel/syscalls/syscall_n64.tbl
index 1ca7bc337932..3d9826dad90f 100644
--- a/arch/mips/kernel/syscalls/syscall_n64.tbl
+++ b/arch/mips/kernel/syscalls/syscall_n64.tbl
@@ -363,3 +363,4 @@
446 n64 landlock_restrict_self sys_landlock_restrict_self
# 447 reserved for memfd_secret
448 n64 process_mrelease sys_process_mrelease
+449 common set_mempolicy_home_node sys_set_mempolicy_home_node
diff --git a/arch/mips/kernel/syscalls/syscall_o32.tbl b/arch/mips/kernel/syscalls/syscall_o32.tbl
index a61c35edaa74..132bb673960a 100644
--- a/arch/mips/kernel/syscalls/syscall_o32.tbl
+++ b/arch/mips/kernel/syscalls/syscall_o32.tbl
@@ -436,3 +436,4 @@
446 o32 landlock_restrict_self sys_landlock_restrict_self
# 447 reserved for memfd_secret
448 o32 process_mrelease sys_process_mrelease
+449 o32 set_mempolicy_home_node sys_set_mempolicy_home_node
diff --git a/arch/parisc/kernel/syscalls/syscall.tbl b/arch/parisc/kernel/syscalls/syscall.tbl
index bf751e0732b7..25732a07f29f 100644
--- a/arch/parisc/kernel/syscalls/syscall.tbl
+++ b/arch/parisc/kernel/syscalls/syscall.tbl
@@ -446,3 +446,4 @@
446 common landlock_restrict_self sys_landlock_restrict_self
# 447 reserved for memfd_secret
448 common process_mrelease sys_process_mrelease
+449 common set_mempolicy_home_node sys_set_mempolicy_home_node
diff --git a/arch/powerpc/kernel/syscalls/syscall.tbl b/arch/powerpc/kernel/syscalls/syscall.tbl
index 7bef917cc84e..6b95e0371812 100644
--- a/arch/powerpc/kernel/syscalls/syscall.tbl
+++ b/arch/powerpc/kernel/syscalls/syscall.tbl
@@ -528,3 +528,4 @@
446 common landlock_restrict_self sys_landlock_restrict_self
# 447 reserved for memfd_secret
448 common process_mrelease sys_process_mrelease
+449 nospu set_mempolicy_home_node sys_set_mempolicy_home_node
diff --git a/arch/s390/kernel/syscalls/syscall.tbl b/arch/s390/kernel/syscalls/syscall.tbl
index df5261e5cfe1..691932966499 100644
--- a/arch/s390/kernel/syscalls/syscall.tbl
+++ b/arch/s390/kernel/syscalls/syscall.tbl
@@ -451,3 +451,4 @@
446 common landlock_restrict_self sys_landlock_restrict_self sys_landlock_restrict_self
# 447 reserved for memfd_secret
448 common process_mrelease sys_process_mrelease sys_process_mrelease
+449 common set_mempolicy_home_node sys_set_mempolicy_home_node sys_set_mempolicy_home_node
diff --git a/arch/sh/kernel/syscalls/syscall.tbl b/arch/sh/kernel/syscalls/syscall.tbl
index 208f131659c5..9cdc7e105e5d 100644
--- a/arch/sh/kernel/syscalls/syscall.tbl
+++ b/arch/sh/kernel/syscalls/syscall.tbl
@@ -451,3 +451,4 @@
446 common landlock_restrict_self sys_landlock_restrict_self
# 447 reserved for memfd_secret
448 common process_mrelease sys_process_mrelease
+449 common set_mempolicy_home_node sys_set_mempolicy_home_node
diff --git a/arch/sparc/kernel/syscalls/syscall.tbl b/arch/sparc/kernel/syscalls/syscall.tbl
index c37764dc764d..d3667c058e51 100644
--- a/arch/sparc/kernel/syscalls/syscall.tbl
+++ b/arch/sparc/kernel/syscalls/syscall.tbl
@@ -494,3 +494,4 @@
446 common landlock_restrict_self sys_landlock_restrict_self
# 447 reserved for memfd_secret
448 common process_mrelease sys_process_mrelease
+449 common set_mempolicy_home_node sys_set_mempolicy_home_node
diff --git a/arch/x86/entry/syscalls/syscall_32.tbl b/arch/x86/entry/syscalls/syscall_32.tbl
index 960a021d543e..85274bd56756 100644
--- a/arch/x86/entry/syscalls/syscall_32.tbl
+++ b/arch/x86/entry/syscalls/syscall_32.tbl
@@ -453,3 +453,4 @@
446 i386 landlock_restrict_self sys_landlock_restrict_self
447 i386 memfd_secret sys_memfd_secret
448 i386 process_mrelease sys_process_mrelease
+449 i386 set_mempolicy_home_node sys_set_mempolicy_home_node
diff --git a/arch/x86/entry/syscalls/syscall_64.tbl b/arch/x86/entry/syscalls/syscall_64.tbl
index 18b5500ea8bf..b20f43fd95bc 100644
--- a/arch/x86/entry/syscalls/syscall_64.tbl
+++ b/arch/x86/entry/syscalls/syscall_64.tbl
@@ -370,6 +370,7 @@
446 common landlock_restrict_self sys_landlock_restrict_self
447 common memfd_secret sys_memfd_secret
448 common process_mrelease sys_process_mrelease
+449 common set_mempolicy_home_node sys_set_mempolicy_home_node
#
# Due to a historical design error, certain syscalls are numbered differently
diff --git a/arch/xtensa/kernel/syscalls/syscall.tbl b/arch/xtensa/kernel/syscalls/syscall.tbl
index 104b327f8ac9..6879ff2c9c27 100644
--- a/arch/xtensa/kernel/syscalls/syscall.tbl
+++ b/arch/xtensa/kernel/syscalls/syscall.tbl
@@ -419,3 +419,4 @@
446 common landlock_restrict_self sys_landlock_restrict_self
# 447 reserved for memfd_secret
448 common process_mrelease sys_process_mrelease
+449 common set_mempolicy_home_node sys_set_mempolicy_home_node
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 252243c7783d..e64d7213d281 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -1052,6 +1052,9 @@ asmlinkage long sys_landlock_add_rule(int ruleset_fd, enum landlock_rule_type ru
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
diff --git a/include/uapi/asm-generic/unistd.h b/include/uapi/asm-generic/unistd.h
index 1c5fb86d455a..c5dd43db8cef 100644
--- a/include/uapi/asm-generic/unistd.h
+++ b/include/uapi/asm-generic/unistd.h
@@ -879,9 +879,11 @@ __SYSCALL(__NR_memfd_secret, sys_memfd_secret)
#endif
#define __NR_process_mrelease 448
__SYSCALL(__NR_process_mrelease, sys_process_mrelease)
+#define __NR_set_mempolicy_home_node 449
+__SYSCALL(__NR_process_mrelease, sys_process_mrelease)
#undef __NR_syscalls
-#define __NR_syscalls 449
+#define __NR_syscalls 450
/*
* 32 bit systems traditionally used different
diff --git a/kernel/sys_ni.c b/kernel/sys_ni.c
index f43d89d92860..3640d432472c 100644
--- a/kernel/sys_ni.c
+++ b/kernel/sys_ni.c
@@ -296,6 +296,7 @@ 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);
--
2.31.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
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[not found] <20211028085701.505593-1-aneesh.kumar@linux.ibm.com>
2021-10-28 8:56 ` [PATCH v3 1/3] mm/mempolicy: use policy_node helper with MPOL_PREFERRED_MANY Aneesh Kumar K.V
2021-10-28 8:57 ` [PATCH v3 2/3] mm/mempolicy: add set_mempolicy_home_node syscall Aneesh Kumar K.V
2021-10-28 8:57 ` [PATCH v3 3/3] mm/mempolicy: wire up syscall set_mempolicy_home_node Aneesh Kumar K.V
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