From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
To: Peter Zijlstra <peterz@infradead.org>,
"Paul E . McKenney" <paulmck@linux.vnet.ibm.com>,
Boqun Feng <boqun.feng@gmail.com>,
Andy Lutomirski <luto@amacapital.net>,
Dave Watson <davejwatson@fb.com>
Cc: linux-kernel@vger.kernel.org, linux-api@vger.kernel.org,
Paul Turner <pjt@google.com>,
Andrew Morton <akpm@linux-foundation.org>,
Russell King <linux@arm.linux.org.uk>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H . Peter Anvin" <hpa@zytor.com>,
Andrew Hunter <ahh@google.com>, Andi Kleen <andi@firstfloor.org>,
Chris Lameter <cl@linux.com>, Ben Maurer <bmaurer@fb.com>,
Steven Rostedt <rostedt@goodmis.org>,
Josh Triplett <josh@joshtriplett.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
Michael Kerrisk <mtk.manpages@gmail.com>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>,
linuxppc-dev@lists.ozlabs.org
Subject: [RFC PATCH for 4.15 07/14] Restartable sequences: Wire up powerpc system call
Date: Mon, 6 Nov 2017 15:56:37 -0500 [thread overview]
Message-ID: <20171106205644.29386-8-mathieu.desnoyers@efficios.com> (raw)
In-Reply-To: <20171106205644.29386-1-mathieu.desnoyers@efficios.com>
From: Boqun Feng <boqun.feng@gmail.com>
Wire up the rseq system call on powerpc.
This provides an ABI improving the speed of a user-space getcpu
operation on powerpc by skipping the getcpu system call on the fast
path, as well as improving the speed of user-space operations on per-cpu
data compared to using load-reservation/store-conditional atomics.
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: Paul Mackerras <paulus@samba.org>
CC: Michael Ellerman <mpe@ellerman.id.au>
CC: Peter Zijlstra <peterz@infradead.org>
CC: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
CC: linuxppc-dev@lists.ozlabs.org
---
arch/powerpc/include/asm/systbl.h | 1 +
arch/powerpc/include/asm/unistd.h | 2 +-
arch/powerpc/include/uapi/asm/unistd.h | 1 +
3 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/include/asm/systbl.h b/arch/powerpc/include/asm/systbl.h
index 449912f057f6..964321a5799c 100644
--- a/arch/powerpc/include/asm/systbl.h
+++ b/arch/powerpc/include/asm/systbl.h
@@ -389,3 +389,4 @@ COMPAT_SYS_SPU(preadv2)
COMPAT_SYS_SPU(pwritev2)
SYSCALL(kexec_file_load)
SYSCALL(statx)
+SYSCALL(rseq)
diff --git a/arch/powerpc/include/asm/unistd.h b/arch/powerpc/include/asm/unistd.h
index 9ba11dbcaca9..e76bd5601ea4 100644
--- a/arch/powerpc/include/asm/unistd.h
+++ b/arch/powerpc/include/asm/unistd.h
@@ -12,7 +12,7 @@
#include <uapi/asm/unistd.h>
-#define NR_syscalls 384
+#define NR_syscalls 385
#define __NR__exit __NR_exit
diff --git a/arch/powerpc/include/uapi/asm/unistd.h b/arch/powerpc/include/uapi/asm/unistd.h
index df8684f31919..b1980fcd56d5 100644
--- a/arch/powerpc/include/uapi/asm/unistd.h
+++ b/arch/powerpc/include/uapi/asm/unistd.h
@@ -395,5 +395,6 @@
#define __NR_pwritev2 381
#define __NR_kexec_file_load 382
#define __NR_statx 383
+#define __NR_rseq 384
#endif /* _UAPI_ASM_POWERPC_UNISTD_H_ */
--
2.11.0
WARNING: multiple messages have this Message-ID
From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
To: Peter Zijlstra <peterz@infradead.org>,
"Paul E . McKenney" <paulmck@linux.vnet.ibm.com>,
Boqun Feng <boqun.feng@gmail.com>,
Andy Lutomirski <luto@amacapital.net>,
Dave Watson <davejwatson@fb.com>
Cc: linux-kernel@vger.kernel.org, linux-api@vger.kernel.org,
Paul Turner <pjt@google.com>,
Andrew Morton <akpm@linux-foundation.org>,
Russell King <linux@arm.linux.org.uk>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H . Peter Anvin" <hpa@zytor.com>,
Andrew Hunter <ahh@google.com>, Andi Kleen <andi@firstfloor.org>,
Chris Lameter <cl@linux.com>, Ben Maurer <bmaurer@fb.com>,
Steven Rostedt <rostedt@goodmis.org>,
Josh Triplett <josh@joshtriplett.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
Michael Kerrisk <mtk.manpages@gmail.com>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>Paul
Subject: [RFC PATCH for 4.15 07/14] Restartable sequences: Wire up powerpc system call
Date: Mon, 6 Nov 2017 15:56:37 -0500 [thread overview]
Message-ID: <20171106205644.29386-8-mathieu.desnoyers@efficios.com> (raw)
In-Reply-To: <20171106205644.29386-1-mathieu.desnoyers@efficios.com>
From: Boqun Feng <boqun.feng@gmail.com>
Wire up the rseq system call on powerpc.
This provides an ABI improving the speed of a user-space getcpu
operation on powerpc by skipping the getcpu system call on the fast
path, as well as improving the speed of user-space operations on per-cpu
data compared to using load-reservation/store-conditional atomics.
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: Paul Mackerras <paulus@samba.org>
CC: Michael Ellerman <mpe@ellerman.id.au>
CC: Peter Zijlstra <peterz@infradead.org>
CC: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
CC: linuxppc-dev@lists.ozlabs.org
---
arch/powerpc/include/asm/systbl.h | 1 +
arch/powerpc/include/asm/unistd.h | 2 +-
arch/powerpc/include/uapi/asm/unistd.h | 1 +
3 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/include/asm/systbl.h b/arch/powerpc/include/asm/systbl.h
index 449912f057f6..964321a5799c 100644
--- a/arch/powerpc/include/asm/systbl.h
+++ b/arch/powerpc/include/asm/systbl.h
@@ -389,3 +389,4 @@ COMPAT_SYS_SPU(preadv2)
COMPAT_SYS_SPU(pwritev2)
SYSCALL(kexec_file_load)
SYSCALL(statx)
+SYSCALL(rseq)
diff --git a/arch/powerpc/include/asm/unistd.h b/arch/powerpc/include/asm/unistd.h
index 9ba11dbcaca9..e76bd5601ea4 100644
--- a/arch/powerpc/include/asm/unistd.h
+++ b/arch/powerpc/include/asm/unistd.h
@@ -12,7 +12,7 @@
#include <uapi/asm/unistd.h>
-#define NR_syscalls 384
+#define NR_syscalls 385
#define __NR__exit __NR_exit
diff --git a/arch/powerpc/include/uapi/asm/unistd.h b/arch/powerpc/include/uapi/asm/unistd.h
index df8684f31919..b1980fcd56d5 100644
--- a/arch/powerpc/include/uapi/asm/unistd.h
+++ b/arch/powerpc/include/uapi/asm/unistd.h
@@ -395,5 +395,6 @@
#define __NR_pwritev2 381
#define __NR_kexec_file_load 382
#define __NR_statx 383
+#define __NR_rseq 384
#endif /* _UAPI_ASM_POWERPC_UNISTD_H_ */
--
2.11.0
next prev parent reply other threads:[~2017-11-06 21:00 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-06 20:56 [RFC PATCH for 4.15 00/14] Restartable sequences and CPU op vector v10 Mathieu Desnoyers
2017-11-06 20:56 ` Mathieu Desnoyers
2017-11-06 20:56 ` [RFC PATCH v10 for 4.15 01/14] Restartable sequences system call Mathieu Desnoyers
2017-11-07 1:24 ` Boqun Feng
2017-11-07 1:24 ` Boqun Feng
2017-11-07 2:20 ` Mathieu Desnoyers
2017-11-07 2:20 ` Mathieu Desnoyers
2017-11-06 20:56 ` [RFC PATCH for 4.15 02/14] Restartable sequences: ARM 32 architecture support Mathieu Desnoyers
2017-11-06 20:56 ` [RFC PATCH for 4.15 03/14] Restartable sequences: wire up ARM 32 system call Mathieu Desnoyers
2017-11-06 20:56 ` [RFC PATCH for 4.15 04/14] Restartable sequences: x86 32/64 architecture support Mathieu Desnoyers
2017-11-06 20:56 ` [RFC PATCH for 4.15 05/14] Restartable sequences: wire up x86 32/64 system call Mathieu Desnoyers
2017-11-06 20:56 ` [RFC PATCH for 4.15 06/14] Restartable sequences: powerpc architecture support Mathieu Desnoyers
2017-11-06 20:56 ` Mathieu Desnoyers
2017-11-06 20:56 ` Mathieu Desnoyers [this message]
2017-11-06 20:56 ` [RFC PATCH for 4.15 07/14] Restartable sequences: Wire up powerpc system call Mathieu Desnoyers
2017-11-06 20:56 ` [RFC PATCH v2 for 4.15 08/14] Provide cpu_opv " Mathieu Desnoyers
2017-11-07 2:07 ` Boqun Feng
2017-11-07 2:07 ` Boqun Feng
2017-11-07 2:40 ` Mathieu Desnoyers
2017-11-07 2:40 ` Mathieu Desnoyers
2017-11-07 3:03 ` Boqun Feng
2017-11-07 3:03 ` Boqun Feng
2017-11-06 20:56 ` [RFC PATCH for 4.15 09/14] cpu_opv: Wire up x86 32/64 " Mathieu Desnoyers
2017-11-06 20:56 ` Mathieu Desnoyers
2017-11-06 20:56 ` [RFC PATCH for 4.15 10/14] cpu_opv: Wire up powerpc " Mathieu Desnoyers
2017-11-06 20:56 ` Mathieu Desnoyers
2017-11-07 0:37 ` Nicholas Piggin
2017-11-07 0:37 ` Nicholas Piggin
2017-11-07 0:47 ` Mathieu Desnoyers
2017-11-07 0:47 ` Mathieu Desnoyers
2017-11-07 1:21 ` Nicholas Piggin
2017-11-07 1:21 ` Nicholas Piggin
2017-11-06 20:56 ` [RFC PATCH for 4.15 11/14] cpu_opv: Wire up ARM32 " Mathieu Desnoyers
2017-11-06 20:56 ` [RFC PATCH v2 for 4.15 12/14] cpu_opv: Implement selftests Mathieu Desnoyers
2017-11-06 20:56 ` [RFC PATCH v2 for 4.15 13/14] Restartable sequences: Provide self-tests Mathieu Desnoyers
2017-11-06 20:56 ` Mathieu Desnoyers
2017-11-06 20:56 ` [RFC PATCH for 4.15 14/14] Restartable sequences selftests: arm: workaround gcc asm size guess Mathieu Desnoyers
2017-11-06 20:56 ` Mathieu Desnoyers
-- strict thread matches above, loose matches on Subject: below --
2017-11-06 9:22 [PATCH] mm, sparse: do not swamp log with huge vmemmap allocation failures Michal Hocko
2017-11-06 9:22 ` Michal Hocko
2017-11-06 17:35 ` Johannes Weiner
2017-11-06 17:35 ` Johannes Weiner
2017-11-06 17:57 ` Joe Perches
2017-11-06 18:14 ` Khalid Aziz
2017-11-06 18:14 ` Khalid Aziz
2017-11-06 18:18 ` Michal Hocko
2017-11-06 18:18 ` Michal Hocko
2017-11-06 20:17 ` Khalid Aziz
2017-11-06 20:17 ` Khalid Aziz
2017-11-07 9:06 ` Michal Hocko
2017-11-07 9:06 ` Michal Hocko
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