From: guangrong.xiao@gmail.com To: pbonzini@redhat.com, mst@redhat.com, mtosatti@redhat.com Cc: kvm@vger.kernel.org, quintela@redhat.com, Xiao Guangrong <xiaoguangrong@tencent.com>, qemu-devel@nongnu.org, peterx@redhat.com, dgilbert@redhat.com, wei.w.wang@intel.com, cota@braap.org, jiang.biao2@zte.com.cn Subject: [PATCH v3 1/5] bitops: introduce change_bit_atomic Date: Thu, 22 Nov 2018 15:20:24 +0800 [thread overview] Message-ID: <20181122072028.22819-2-xiaoguangrong@tencent.com> (raw) In-Reply-To: <20181122072028.22819-1-xiaoguangrong@tencent.com> From: Xiao Guangrong <xiaoguangrong@tencent.com> It will be used by threaded workqueue Signed-off-by: Xiao Guangrong <xiaoguangrong@tencent.com> --- include/qemu/bitops.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/include/qemu/bitops.h b/include/qemu/bitops.h index 3f0926cf40..c522958852 100644 --- a/include/qemu/bitops.h +++ b/include/qemu/bitops.h @@ -79,6 +79,19 @@ static inline void change_bit(long nr, unsigned long *addr) *p ^= mask; } +/** + * change_bit_atomic - Toggle a bit in memory atomically + * @nr: Bit to change + * @addr: Address to start counting from + */ +static inline void change_bit_atomic(long nr, unsigned long *addr) +{ + unsigned long mask = BIT_MASK(nr); + unsigned long *p = addr + BIT_WORD(nr); + + atomic_xor(p, mask); +} + /** * test_and_set_bit - Set a bit and return its old value * @nr: Bit to set -- 2.14.5
WARNING: multiple messages have this Message-ID (diff)
From: guangrong.xiao@gmail.com To: pbonzini@redhat.com, mst@redhat.com, mtosatti@redhat.com Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org, dgilbert@redhat.com, peterx@redhat.com, wei.w.wang@intel.com, jiang.biao2@zte.com.cn, eblake@redhat.com, quintela@redhat.com, cota@braap.org, Xiao Guangrong <xiaoguangrong@tencent.com> Subject: [Qemu-devel] [PATCH v3 1/5] bitops: introduce change_bit_atomic Date: Thu, 22 Nov 2018 15:20:24 +0800 [thread overview] Message-ID: <20181122072028.22819-2-xiaoguangrong@tencent.com> (raw) In-Reply-To: <20181122072028.22819-1-xiaoguangrong@tencent.com> From: Xiao Guangrong <xiaoguangrong@tencent.com> It will be used by threaded workqueue Signed-off-by: Xiao Guangrong <xiaoguangrong@tencent.com> --- include/qemu/bitops.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/include/qemu/bitops.h b/include/qemu/bitops.h index 3f0926cf40..c522958852 100644 --- a/include/qemu/bitops.h +++ b/include/qemu/bitops.h @@ -79,6 +79,19 @@ static inline void change_bit(long nr, unsigned long *addr) *p ^= mask; } +/** + * change_bit_atomic - Toggle a bit in memory atomically + * @nr: Bit to change + * @addr: Address to start counting from + */ +static inline void change_bit_atomic(long nr, unsigned long *addr) +{ + unsigned long mask = BIT_MASK(nr); + unsigned long *p = addr + BIT_WORD(nr); + + atomic_xor(p, mask); +} + /** * test_and_set_bit - Set a bit and return its old value * @nr: Bit to set -- 2.14.5
next prev parent reply other threads:[~2018-11-22 7:20 UTC|newest] Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-11-22 7:20 [PATCH v3 0/5] migration: improve multithreads guangrong.xiao 2018-11-22 7:20 ` [Qemu-devel] " guangrong.xiao 2018-11-22 7:20 ` guangrong.xiao [this message] 2018-11-22 7:20 ` [Qemu-devel] [PATCH v3 1/5] bitops: introduce change_bit_atomic guangrong.xiao 2018-11-23 10:23 ` Dr. David Alan Gilbert 2018-11-23 10:23 ` [Qemu-devel] " Dr. David Alan Gilbert 2018-11-28 9:35 ` Juan Quintela 2018-11-28 9:35 ` [Qemu-devel] " Juan Quintela 2018-11-22 7:20 ` [PATCH v3 2/5] util: introduce threaded workqueue guangrong.xiao 2018-11-22 7:20 ` [Qemu-devel] " guangrong.xiao 2018-11-23 11:02 ` Dr. David Alan Gilbert 2018-11-23 11:02 ` [Qemu-devel] " Dr. David Alan Gilbert 2018-11-26 7:57 ` Xiao Guangrong 2018-11-26 7:57 ` [Qemu-devel] " Xiao Guangrong 2018-11-26 10:56 ` Dr. David Alan Gilbert 2018-11-26 10:56 ` [Qemu-devel] " Dr. David Alan Gilbert 2018-11-27 7:17 ` Xiao Guangrong 2018-11-27 7:17 ` [Qemu-devel] " Xiao Guangrong 2018-11-26 18:55 ` Emilio G. Cota 2018-11-26 18:55 ` [Qemu-devel] " Emilio G. Cota 2018-11-27 8:30 ` Xiao Guangrong 2018-11-27 8:30 ` [Qemu-devel] " Xiao Guangrong 2018-11-24 0:12 ` Emilio G. Cota 2018-11-24 0:12 ` [Qemu-devel] " Emilio G. Cota 2018-11-26 8:06 ` Xiao Guangrong 2018-11-26 8:06 ` [Qemu-devel] " Xiao Guangrong 2018-11-26 18:49 ` Emilio G. Cota 2018-11-26 18:49 ` [Qemu-devel] " Emilio G. Cota 2018-11-27 8:29 ` Xiao Guangrong 2018-11-27 8:29 ` [Qemu-devel] " Xiao Guangrong 2018-11-24 0:17 ` Emilio G. Cota 2018-11-24 0:17 ` [Qemu-devel] " Emilio G. Cota 2018-11-26 8:18 ` Xiao Guangrong 2018-11-26 8:18 ` [Qemu-devel] " Xiao Guangrong 2018-11-26 10:28 ` Paolo Bonzini 2018-11-26 10:28 ` [Qemu-devel] " Paolo Bonzini 2018-11-27 8:31 ` Xiao Guangrong 2018-11-27 8:31 ` [Qemu-devel] " Xiao Guangrong 2018-11-27 12:49 ` Christophe de Dinechin 2018-11-27 12:49 ` [Qemu-devel] " Christophe de Dinechin 2018-11-27 13:51 ` Paolo Bonzini 2018-11-27 13:51 ` [Qemu-devel] " Paolo Bonzini 2018-12-04 15:49 ` Christophe de Dinechin 2018-12-04 15:49 ` [Qemu-devel] " Christophe de Dinechin 2018-12-04 17:16 ` Paolo Bonzini 2018-12-04 17:16 ` [Qemu-devel] " Paolo Bonzini 2018-12-10 3:23 ` Xiao Guangrong 2018-12-10 3:23 ` [Qemu-devel] " Xiao Guangrong 2018-11-27 17:39 ` Emilio G. Cota 2018-11-27 17:39 ` [Qemu-devel] " Emilio G. Cota 2018-11-28 8:55 ` Xiao Guangrong 2018-11-28 8:55 ` [Qemu-devel] " Xiao Guangrong 2018-11-22 7:20 ` [PATCH v3 3/5] migration: use threaded workqueue for compression guangrong.xiao 2018-11-22 7:20 ` [Qemu-devel] " guangrong.xiao 2018-11-23 18:17 ` Dr. David Alan Gilbert 2018-11-23 18:17 ` [Qemu-devel] " Dr. David Alan Gilbert 2018-11-23 18:22 ` Paolo Bonzini 2018-11-23 18:22 ` [Qemu-devel] " Paolo Bonzini 2018-11-23 18:29 ` Dr. David Alan Gilbert 2018-11-23 18:29 ` [Qemu-devel] " Dr. David Alan Gilbert 2018-11-26 8:00 ` Xiao Guangrong 2018-11-26 8:00 ` [Qemu-devel] " Xiao Guangrong 2018-11-22 7:20 ` [PATCH v3 4/5] migration: use threaded workqueue for decompression guangrong.xiao 2018-11-22 7:20 ` [Qemu-devel] " guangrong.xiao 2018-11-22 7:20 ` [PATCH v3 5/5] tests: add threaded-workqueue-bench guangrong.xiao 2018-11-22 7:20 ` [Qemu-devel] " guangrong.xiao 2018-11-22 21:25 ` [PATCH v3 0/5] migration: improve multithreads no-reply 2018-11-22 21:25 ` [Qemu-devel] " no-reply 2018-11-22 21:35 ` no-reply 2018-11-22 21:35 ` [Qemu-devel] " no-reply
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