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From: Claudio Imbrenda <imbrenda@linux.ibm.com>
To: linux-kernel@vger.kernel.org, linux-mm@kvack.org
Cc: thuth@redhat.com, frankja@linux.ibm.com, borntraeger@de.ibm.com,
	Ulrich.Weigand@de.ibm.com, heiko.carstens@de.ibm.com,
	david@redhat.com, ultrachin@163.com, akpm@linux-foundation.org,
	vbabka@suse.cz, brookxu.cn@gmail.com, xiaoggchen@tencent.com,
	linuszeng@tencent.com, yihuilu@tencent.com, mhocko@suse.com,
	daniel.m.jordan@oracle.com, axboe@kernel.dk, legion@kernel.org,
	peterz@infradead.org, aarcange@redhat.com, christian@brauner.io,
	ebiederm@xmission.com, tglx@linutronix.de
Subject: [RFC v1 3/4] mm: wire up the process_mmput_async syscall
Date: Thu, 11 Nov 2021 10:50:07 +0100	[thread overview]
Message-ID: <20211111095008.264412-5-imbrenda@linux.ibm.com> (raw)
In-Reply-To: <20211111095008.264412-1-imbrenda@linux.ibm.com>

Wire up the process_mmput_async syscall.

Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
---
 arch/alpha/kernel/syscalls/syscall.tbl      | 2 ++
 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       | 2 ++
 arch/m68k/kernel/syscalls/syscall.tbl       | 2 ++
 arch/microblaze/kernel/syscalls/syscall.tbl | 2 ++
 arch/mips/kernel/syscalls/syscall_n32.tbl   | 2 ++
 arch/mips/kernel/syscalls/syscall_n64.tbl   | 2 ++
 arch/mips/kernel/syscalls/syscall_o32.tbl   | 2 ++
 arch/parisc/kernel/syscalls/syscall.tbl     | 2 ++
 arch/powerpc/kernel/syscalls/syscall.tbl    | 2 ++
 arch/s390/kernel/syscalls/syscall.tbl       | 2 ++
 arch/sh/kernel/syscalls/syscall.tbl         | 2 ++
 arch/sparc/kernel/syscalls/syscall.tbl      | 2 ++
 arch/x86/entry/syscalls/syscall_32.tbl      | 1 +
 arch/x86/entry/syscalls/syscall_64.tbl      | 1 +
 arch/xtensa/kernel/syscalls/syscall.tbl     | 2 ++
 include/linux/syscalls.h                    | 1 +
 include/uapi/asm-generic/unistd.h           | 5 ++++-
 kernel/sys_ni.c                             | 1 +
 21 files changed, 38 insertions(+), 2 deletions(-)

diff --git a/arch/alpha/kernel/syscalls/syscall.tbl b/arch/alpha/kernel/syscalls/syscall.tbl
index e4a041cd5715..2ec84b67534e 100644
--- a/arch/alpha/kernel/syscalls/syscall.tbl
+++ b/arch/alpha/kernel/syscalls/syscall.tbl
@@ -488,3 +488,5 @@
 556	common	landlock_restrict_self		sys_landlock_restrict_self
 # 557 reserved for memfd_secret
 558	common	process_mrelease		sys_process_mrelease
+# 559 reserved for futex_waitv
+560	common	process_mmput_async		sys_process_mmput_async
diff --git a/arch/arm/tools/syscall.tbl b/arch/arm/tools/syscall.tbl
index 543100151f2b..8aee1a20f4d5 100644
--- a/arch/arm/tools/syscall.tbl
+++ b/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	process_mmput_async		sys_process_mmput_async
diff --git a/arch/arm64/include/asm/unistd.h b/arch/arm64/include/asm/unistd.h
index 6bdb5f5db438..4e65da3445c7 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		450
+#define __NR_compat_syscalls		451
 #endif
 
 #define __ARCH_WANT_SYS_CLONE
diff --git a/arch/arm64/include/asm/unistd32.h b/arch/arm64/include/asm/unistd32.h
index 41ea1195e44b..e3b75a2896d2 100644
--- a/arch/arm64/include/asm/unistd32.h
+++ b/arch/arm64/include/asm/unistd32.h
@@ -905,6 +905,8 @@ __SYSCALL(__NR_landlock_restrict_self, sys_landlock_restrict_self)
 __SYSCALL(__NR_process_mrelease, sys_process_mrelease)
 #define __NR_futex_waitv 449
 __SYSCALL(__NR_futex_waitv, sys_futex_waitv)
+#define __NR_process_mmput_async 450
+__SYSCALL(__NR_process_mmput_async, sys_process_mmput_async)
 
 /*
  * 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..c1e454342e94 100644
--- a/arch/ia64/kernel/syscalls/syscall.tbl
+++ b/arch/ia64/kernel/syscalls/syscall.tbl
@@ -369,3 +369,5 @@
 446	common	landlock_restrict_self		sys_landlock_restrict_self
 # 447 reserved for memfd_secret
 448	common	process_mrelease		sys_process_mrelease
+# 449 reserved for futex_waitv
+450	common	process_mmput_async		sys_process_mmput_async
diff --git a/arch/m68k/kernel/syscalls/syscall.tbl b/arch/m68k/kernel/syscalls/syscall.tbl
index 7976dff8f879..b89bcb3b50d0 100644
--- a/arch/m68k/kernel/syscalls/syscall.tbl
+++ b/arch/m68k/kernel/syscalls/syscall.tbl
@@ -448,3 +448,5 @@
 446	common	landlock_restrict_self		sys_landlock_restrict_self
 # 447 reserved for memfd_secret
 448	common	process_mrelease		sys_process_mrelease
+# 449 reserved for futex_waitv
+450	common	process_mmput_async		sys_process_mmput_async
diff --git a/arch/microblaze/kernel/syscalls/syscall.tbl b/arch/microblaze/kernel/syscalls/syscall.tbl
index 6b0e11362bd2..cf4df3a9f95d 100644
--- a/arch/microblaze/kernel/syscalls/syscall.tbl
+++ b/arch/microblaze/kernel/syscalls/syscall.tbl
@@ -454,3 +454,5 @@
 446	common	landlock_restrict_self		sys_landlock_restrict_self
 # 447 reserved for memfd_secret
 448	common	process_mrelease		sys_process_mrelease
+# 449 reserved for futex_waitv
+450	common	process_mmput_async		sys_process_mmput_async
diff --git a/arch/mips/kernel/syscalls/syscall_n32.tbl b/arch/mips/kernel/syscalls/syscall_n32.tbl
index 70e32de2bcaa..6374c2acc370 100644
--- a/arch/mips/kernel/syscalls/syscall_n32.tbl
+++ b/arch/mips/kernel/syscalls/syscall_n32.tbl
@@ -387,3 +387,5 @@
 446	n32	landlock_restrict_self		sys_landlock_restrict_self
 # 447 reserved for memfd_secret
 448	n32	process_mrelease		sys_process_mrelease
+# 449 reserved for futex_waitv
+450	common	process_mmput_async		sys_process_mmput_async
diff --git a/arch/mips/kernel/syscalls/syscall_n64.tbl b/arch/mips/kernel/syscalls/syscall_n64.tbl
index 1ca7bc337932..f7d336bcdcad 100644
--- a/arch/mips/kernel/syscalls/syscall_n64.tbl
+++ b/arch/mips/kernel/syscalls/syscall_n64.tbl
@@ -363,3 +363,5 @@
 446	n64	landlock_restrict_self		sys_landlock_restrict_self
 # 447 reserved for memfd_secret
 448	n64	process_mrelease		sys_process_mrelease
+# 449 reserved for futex_waitv
+450	common	process_mmput_async		sys_process_mmput_async
diff --git a/arch/mips/kernel/syscalls/syscall_o32.tbl b/arch/mips/kernel/syscalls/syscall_o32.tbl
index a61c35edaa74..1b4572b4c0f4 100644
--- a/arch/mips/kernel/syscalls/syscall_o32.tbl
+++ b/arch/mips/kernel/syscalls/syscall_o32.tbl
@@ -436,3 +436,5 @@
 446	o32	landlock_restrict_self		sys_landlock_restrict_self
 # 447 reserved for memfd_secret
 448	o32	process_mrelease		sys_process_mrelease
+# 449 reserved for futex_waitv
+450	common	process_mmput_async		sys_process_mmput_async
diff --git a/arch/parisc/kernel/syscalls/syscall.tbl b/arch/parisc/kernel/syscalls/syscall.tbl
index bf751e0732b7..58fca00dd2c4 100644
--- a/arch/parisc/kernel/syscalls/syscall.tbl
+++ b/arch/parisc/kernel/syscalls/syscall.tbl
@@ -446,3 +446,5 @@
 446	common	landlock_restrict_self		sys_landlock_restrict_self
 # 447 reserved for memfd_secret
 448	common	process_mrelease		sys_process_mrelease
+# 449 reserved for futex_waitv
+450	common	process_mmput_async		sys_process_mmput_async
diff --git a/arch/powerpc/kernel/syscalls/syscall.tbl b/arch/powerpc/kernel/syscalls/syscall.tbl
index 7bef917cc84e..9c62f9ca307f 100644
--- a/arch/powerpc/kernel/syscalls/syscall.tbl
+++ b/arch/powerpc/kernel/syscalls/syscall.tbl
@@ -528,3 +528,5 @@
 446	common	landlock_restrict_self		sys_landlock_restrict_self
 # 447 reserved for memfd_secret
 448	common	process_mrelease		sys_process_mrelease
+# 449 reserved for futex_waitv
+450	common	process_mmput_async		sys_process_mmput_async
diff --git a/arch/s390/kernel/syscalls/syscall.tbl b/arch/s390/kernel/syscalls/syscall.tbl
index df5261e5cfe1..aa6b50367a8b 100644
--- a/arch/s390/kernel/syscalls/syscall.tbl
+++ b/arch/s390/kernel/syscalls/syscall.tbl
@@ -451,3 +451,5 @@
 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 reserved for futex_waitv
+450  common	process_mmput_async	sys_process_mmput_async		sys_process_mmput_async
diff --git a/arch/sh/kernel/syscalls/syscall.tbl b/arch/sh/kernel/syscalls/syscall.tbl
index 208f131659c5..372122390fa2 100644
--- a/arch/sh/kernel/syscalls/syscall.tbl
+++ b/arch/sh/kernel/syscalls/syscall.tbl
@@ -451,3 +451,5 @@
 446	common	landlock_restrict_self		sys_landlock_restrict_self
 # 447 reserved for memfd_secret
 448	common	process_mrelease		sys_process_mrelease
+# 449 reserved for futex_waitv
+450	common	process_mmput_async		sys_process_mmput_async
diff --git a/arch/sparc/kernel/syscalls/syscall.tbl b/arch/sparc/kernel/syscalls/syscall.tbl
index c37764dc764d..5c1448ead433 100644
--- a/arch/sparc/kernel/syscalls/syscall.tbl
+++ b/arch/sparc/kernel/syscalls/syscall.tbl
@@ -494,3 +494,5 @@
 446	common	landlock_restrict_self		sys_landlock_restrict_self
 # 447 reserved for memfd_secret
 448	common	process_mrelease		sys_process_mrelease
+# 449 reserved for futex_waitv
+450	common	process_mmput_async		sys_process_mmput_async
diff --git a/arch/x86/entry/syscalls/syscall_32.tbl b/arch/x86/entry/syscalls/syscall_32.tbl
index 7e25543693de..ad034bc349ec 100644
--- a/arch/x86/entry/syscalls/syscall_32.tbl
+++ b/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	process_mmput_async	sys_process_mmput_async
diff --git a/arch/x86/entry/syscalls/syscall_64.tbl b/arch/x86/entry/syscalls/syscall_64.tbl
index fe8f8dd157b4..df659c967932 100644
--- a/arch/x86/entry/syscalls/syscall_64.tbl
+++ b/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	process_mmput_async	sys_process_mmput_async
 
 #
 # 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..7534f2969af6 100644
--- a/arch/xtensa/kernel/syscalls/syscall.tbl
+++ b/arch/xtensa/kernel/syscalls/syscall.tbl
@@ -419,3 +419,5 @@
 446	common	landlock_restrict_self		sys_landlock_restrict_self
 # 447 reserved for memfd_secret
 448	common	process_mrelease		sys_process_mrelease
+# 449 reserved for futex_waitv
+450	common	process_mmput_async		sys_process_mmput_async
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 528a478dbda8..e416f6f8a4b8 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -920,6 +920,7 @@ asmlinkage long sys_mincore(unsigned long start, size_t len,
 asmlinkage long sys_madvise(unsigned long start, size_t len, int behavior);
 asmlinkage long sys_process_madvise(int pidfd, const struct iovec __user *vec,
 			size_t vlen, int behavior, unsigned int flags);
+asmlinkage long sys_process_mmput_async(int pidfd, unsigned int flags);
 asmlinkage long sys_process_mrelease(int pidfd, unsigned int flags);
 asmlinkage long sys_remap_file_pages(unsigned long start, unsigned long size,
 			unsigned long prot, unsigned long pgoff,
diff --git a/include/uapi/asm-generic/unistd.h b/include/uapi/asm-generic/unistd.h
index 4557a8b6086f..bf6b9c3e4957 100644
--- a/include/uapi/asm-generic/unistd.h
+++ b/include/uapi/asm-generic/unistd.h
@@ -883,8 +883,11 @@ __SYSCALL(__NR_process_mrelease, sys_process_mrelease)
 #define __NR_futex_waitv 449
 __SYSCALL(__NR_futex_waitv, sys_futex_waitv)
 
+#define __NR_process_mmput_async 450
+__SYSCALL(__NR_process_mmput_async, sys_process_mmput_async)
+
 #undef __NR_syscalls
-#define __NR_syscalls 450
+#define __NR_syscalls 451
 
 /*
  * 32 bit systems traditionally used different
diff --git a/kernel/sys_ni.c b/kernel/sys_ni.c
index d1944258cfc0..0b69802a3d62 100644
--- a/kernel/sys_ni.c
+++ b/kernel/sys_ni.c
@@ -290,6 +290,7 @@ COND_SYSCALL(munlockall);
 COND_SYSCALL(mincore);
 COND_SYSCALL(madvise);
 COND_SYSCALL(process_madvise);
+COND_SYSCALL(process_mmput_async);
 COND_SYSCALL(process_mrelease);
 COND_SYSCALL(remap_file_pages);
 COND_SYSCALL(mbind);
-- 
2.31.1


  parent reply	other threads:[~2021-11-11  9:51 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-11  9:50 [RFC v1 0/4] Two alternatives for mm async teardown Claudio Imbrenda
2021-11-11  9:50 ` [RFC v1 1/4] add arch mmput hook in exit.c Claudio Imbrenda
2021-11-11  9:50 ` [RFC v1 1/4] exit: add arch mmput hook in exit_mm Claudio Imbrenda
2021-11-11 18:43   ` Eric W. Biederman
2021-11-11  9:50 ` [RFC v1 2/4] kernel/fork.c: implement new process_mmput_async syscall Claudio Imbrenda
2021-11-11 19:20   ` Eric W. Biederman
2021-11-12  9:27     ` Claudio Imbrenda
2021-11-12  9:34     ` Claudio Imbrenda
2021-11-12 14:57       ` Eric W. Biederman
2021-11-12 16:53         ` Claudio Imbrenda
2021-11-15 10:43           ` Michal Hocko
2021-11-11  9:50 ` Claudio Imbrenda [this message]
2021-11-18 18:47   ` [RFC v1 3/4] mm: wire up the " kernel test robot
2021-11-11  9:50 ` [RFC v1 4/4] kernel/fork.c: process_mmput_async: stop OOM while freeing memory Claudio Imbrenda
2021-11-12 10:15 ` [RFC v1 0/4] Two alternatives for mm async teardown Michal Hocko

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