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From: KY Srinivasan <kys@microsoft.com>
To: "Roman Kagan" <rkagan@virtuozzo.com>,
	"Paolo Bonzini" <pbonzini@redhat.com>,
	"Radim Krčmář" <rkrcmar@redhat.com>,
	"Vitaly Kuznetsov" <vkuznets@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
	"x86@kernel.org" <x86@kernel.org>,
	"Haiyang Zhang" <haiyangz@microsoft.com>,
	"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"devel@linuxdriverproject.org" <devel@linuxdriverproject.org>,
	"Denis V . Lunev" <den@openvz.org>
Subject: RE: [PATCH 03/15] hyperv: use standard bitops
Date: Wed, 21 Dec 2016 19:08:24 +0000	[thread overview]
Message-ID: <DM5PR03MB2490D5F2E1D208D674A5FFB1A0930@DM5PR03MB2490.namprd03.prod.outlook.com> (raw)
In-Reply-To: <20161220155602.6298-4-rkagan@virtuozzo.com>



> -----Original Message-----
> From: Roman Kagan [mailto:rkagan@virtuozzo.com]
> Sent: Tuesday, December 20, 2016 7:56 AM
> To: Paolo Bonzini <pbonzini@redhat.com>; Radim Krčmář
> <rkrcmar@redhat.com>; KY Srinivasan <kys@microsoft.com>; Vitaly
> Kuznetsov <vkuznets@redhat.com>
> Cc: Thomas Gleixner <tglx@linutronix.de>; Ingo Molnar
> <mingo@redhat.com>; H. Peter Anvin <hpa@zytor.com>; x86@kernel.org;
> Haiyang Zhang <haiyangz@microsoft.com>; kvm@vger.kernel.org; linux-
> kernel@vger.kernel.org; devel@linuxdriverproject.org; Denis V . Lunev
> <den@openvz.org>; Roman Kagan <rkagan@virtuozzo.com>
> Subject: [PATCH 03/15] hyperv: use standard bitops
>
No commit log?
 
> Signed-off-by: Roman Kagan <rkagan@virtuozzo.com>
> ---
>  drivers/hv/channel.c    | 8 +++-----
>  drivers/hv/connection.c | 9 +++------
>  2 files changed, 6 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c
> index 5fb4c6d..f9df275 100644
> --- a/drivers/hv/channel.c
> +++ b/drivers/hv/channel.c
> @@ -49,15 +49,13 @@ void vmbus_setevent(struct vmbus_channel
> *channel)
>  	 */
>  	if ((channel->offermsg.monitor_allocated) &&
>  	    (!channel->low_latency)) {
> -		/* Each u32 represents 32 channels */
> -		sync_set_bit(channel->offermsg.child_relid & 31,
> -			(unsigned long *) vmbus_connection.send_int_page
> +
> -			(channel->offermsg.child_relid >> 5));
> +		set_bit(channel->offermsg.child_relid,
> +			(unsigned long
> *)vmbus_connection.send_int_page);
>
What is the rationale for dropping the sync variant?
 
>  		/* Get the child to parent monitor page */
>  		monitorpage = vmbus_connection.monitor_pages[1];
> 
> -		sync_set_bit(channel->monitor_bit,
> +		set_bit(channel->monitor_bit,
>  			(unsigned long *)&monitorpage->trigger_group
>  					[channel->monitor_grp].pending);
> 
Same comment as before.
> diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c
> index aaa2103..139b33e 100644
> --- a/drivers/hv/connection.c
> +++ b/drivers/hv/connection.c
> @@ -468,12 +468,9 @@ void vmbus_set_event(struct vmbus_channel
> *channel)
>  {
>  	u32 child_relid = channel->offermsg.child_relid;
> 
> -	if (!channel->is_dedicated_interrupt) {
> -		/* Each u32 represents 32 channels */
> -		sync_set_bit(child_relid & 31,
> -			(unsigned long *)vmbus_connection.send_int_page
> +
> -			(child_relid >> 5));
> -	}
> +	if (!channel->is_dedicated_interrupt)
> +		set_bit(child_relid,
> +			(unsigned long
> *)vmbus_connection.send_int_page);
> 
>  	hv_do_hypercall(HVCALL_SIGNAL_EVENT, channel->sig_event,
> NULL);
>  }
> --
> 2.9.3

  parent reply	other threads:[~2016-12-21 19:24 UTC|newest]

Thread overview: 54+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-12-20 15:55 [PATCH 00/15] hyperv: more stuff to uapi + cleanup Roman Kagan
2016-12-20 15:55 ` [PATCH 01/15] hyperv: consolidate TSC ref page definitions Roman Kagan
2016-12-20 20:57   ` KY Srinivasan
2016-12-21  6:25     ` Roman Kagan
2016-12-20 15:55 ` [PATCH 02/15] hyperv: uapi-fy synic event flags definitions Roman Kagan
2016-12-20 17:24   ` Stephen Hemminger
2016-12-21  6:33     ` Roman Kagan
2016-12-21 10:58   ` kbuild test robot
2016-12-21 18:58   ` KY Srinivasan
2016-12-20 15:55 ` [PATCH 03/15] hyperv: use standard bitops Roman Kagan
2016-12-21 12:00   ` Olaf Hering
2016-12-21 13:23     ` Roman Kagan
2016-12-22 12:33       ` Paolo Bonzini
2016-12-21 19:08   ` KY Srinivasan [this message]
2016-12-20 15:55 ` [PATCH 04/15] hyperv: define VMBus message type Roman Kagan
2016-12-20 15:55 ` [PATCH 05/15] hyperv: GFP_ATOMIC -> GFP_KERNEL Roman Kagan
2016-12-20 15:55 ` [PATCH 06/15] hyperv: avoid unnecessary vmalloc Roman Kagan
2016-12-21 19:19   ` KY Srinivasan
2016-12-20 15:55 ` [PATCH 07/15] hyperv: dedup cpuid definitions Roman Kagan
2016-12-20 15:55 ` [PATCH 08/15] hyperv: dedup crash msr related definitions Roman Kagan
2016-12-20 15:55 ` [PATCH 09/15] hyperv: unify Hyper-V msr definitions Roman Kagan
2016-12-20 15:55 ` [PATCH 10/15] hyperv: uapi-fy PostMessage and SignalEvent hypercall structures Roman Kagan
2016-12-21 19:27   ` KY Srinivasan
2016-12-20 15:55 ` [PATCH 11/15] hyperv: uapi-fy monitored notification structures Roman Kagan
2016-12-20 15:55 ` [PATCH 12/15] hyperv: move VMBus connection ids to uapi Roman Kagan
2016-12-20 17:25   ` Stephen Hemminger
2016-12-21  6:29     ` Roman Kagan
2016-12-21 12:18       ` Christoph Hellwig
2016-12-21 12:59         ` Roman Kagan
2016-12-21 14:26           ` Christoph Hellwig
2016-12-21 14:39             ` Roman Kagan
2016-12-21 15:39             ` Paolo Bonzini
2016-12-21 15:43               ` Christoph Hellwig
2016-12-21 17:25                 ` Paolo Bonzini
2016-12-21 17:50                 ` Stephen Hemminger
2016-12-21 17:53                   ` Paolo Bonzini
2016-12-21 17:58                   ` Christoph Hellwig
2016-12-21 18:02                     ` Stephen Hemminger
2016-12-21 19:54                       ` KY Srinivasan
2016-12-28 17:09                         ` Roman Kagan
2016-12-29 18:29                           ` Stephen Hemminger
2017-01-02  8:19                           ` Paolo Bonzini
2017-01-09  8:32                             ` Roman Kagan
2017-01-09  8:40                               ` hpa
2017-01-09  8:58                                 ` Roman Kagan
2017-01-09  9:02                                 ` Paolo Bonzini
2017-01-02 19:39                           ` Stephen Hemminger
2017-01-03  9:32                             ` Paolo Bonzini
2016-12-20 15:56 ` [PATCH 13/15] hyperv: move function close to its only callsite Roman Kagan
2016-12-20 15:56 ` [PATCH 14/15] hyperv_vmbus: drop unused definitions Roman Kagan
2016-12-20 15:56 ` [PATCH 15/15] hyperv: redefine hv_message without bitfields Roman Kagan
2016-12-21 18:00 ` [PATCH 00/15] hyperv: more stuff to uapi + cleanup KY Srinivasan
2016-12-28 16:57   ` Roman Kagan
2016-12-30 19:45     ` KY Srinivasan

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