From: Davidlohr Bueso <dave@stgolabs.net>
To: KY Srinivasan <kys@microsoft.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>,
"peterz@infradead.org" <peterz@infradead.org>,
"mingo@kernel.org" <mingo@kernel.org>,
"davem@davemloft.net" <davem@davemloft.net>,
"cw00.choi@samsung.com" <cw00.choi@samsung.com>,
"dougthompson@xmission.com" <dougthompson@xmission.com>,
"bp@alien8.de" <bp@alien8.de>,
"mchehab@osg.samsung.com" <mchehab@osg.samsung.com>,
"gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>,
"pfg@sgi.com" <pfg@sgi.com>,
"jikos@kernel.org" <jikos@kernel.org>,
"hans.verkuil@cisco.com" <hans.verkuil@cisco.com>,
"awalls@md.metrocast.net" <awalls@md.metrocast.net>,
"dledford@redhat.com" <dledford@redhat.com>,
"sean.hefty@intel.com" <sean.hefty@intel.com>,
"heiko.carstens@de.ibm.com" <heiko.carstens@de.ibm.com>,
"sumit.semwal@linaro.org" <sumit.semwal@linaro.org>,
"schwidefsky@de.ibm.com" <schwidefsky@de.ibm.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH -tip 00/12] locking/atomics: Add and use inc,dec calls for FETCH-OP flavors
Date: Fri, 24 Jun 2016 12:35:36 -0700 [thread overview]
Message-ID: <20160624193536.GA26017@linux-80c1.suse> (raw)
In-Reply-To: <DM2PR0301MB0783C04F7978E8DC72EDBA73A02E0@DM2PR0301MB0783.namprd03.prod.outlook.com>
On Fri, 24 Jun 2016, KY Srinivasan wrote:
>How so? Can you expand on the racy part. The subtraction is done on a local copy of
>the value.
Yeah, you're right. I took a look at the generated code and I was unnecessarily worried
about the window between the return value and the subtraction.
Thanks,
Davidlohr
next prev parent reply other threads:[~2016-06-24 19:35 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-20 20:05 [PATCH -tip 00/12] locking/atomics: Add and use inc,dec calls for FETCH-OP flavors Davidlohr Bueso
2016-06-20 20:05 ` [PATCH 01/12] locking/atomic: Introduce inc/dec " Davidlohr Bueso
2016-06-21 7:28 ` Peter Zijlstra
2016-06-21 13:33 ` [PATCH v2 " Davidlohr Bueso
2016-06-21 16:36 ` Davidlohr Bueso
2016-06-23 9:09 ` Peter Zijlstra
2016-06-24 16:34 ` Davidlohr Bueso
2016-06-24 18:48 ` Peter Zijlstra
2016-06-28 21:56 ` [PATCH -v4 " Davidlohr Bueso
2016-07-07 8:33 ` [tip:locking/core] locking/atomic: Introduce inc/dec variants for the atomic_fetch_$op() API tip-bot for Davidlohr Bueso
2016-06-20 20:05 ` [PATCH 02/12] net/neighbour: Employ atomic_fetch_inc() Davidlohr Bueso
2016-06-20 20:05 ` [PATCH 03/12] PM,devfreq: " Davidlohr Bueso
2016-07-02 5:04 ` Chanwoo Choi
2016-06-20 20:05 ` [PATCH 04/12] EDAC: " Davidlohr Bueso
2016-06-21 13:59 ` Borislav Petkov
2016-06-20 20:05 ` [PATCH 05/12] tty/serial: " Davidlohr Bueso
2016-06-20 20:05 ` [PATCH 06/12] HID,wacom: " Davidlohr Bueso
2016-06-22 8:10 ` Jiri Kosina
2016-06-20 20:05 ` [PATCH 07/12] drivers/media: " Davidlohr Bueso
2016-07-13 16:07 ` Mauro Carvalho Chehab
2016-06-20 20:06 ` [PATCH 08/12] infiniband: " Davidlohr Bueso
2016-06-20 20:06 ` [PATCH 09/12] drivers/hv: " Davidlohr Bueso
2016-06-20 20:06 ` [PATCH 10/12] s390/scm_block: " Davidlohr Bueso
2016-06-20 20:06 ` [PATCH 11/12] scsi: " Davidlohr Bueso
2016-06-20 20:06 ` [PATCH 12/12] dma-buf/fence: Employ atomic_fetch_add Davidlohr Bueso
2016-06-24 16:46 ` [PATCH -tip 00/12] locking/atomics: Add and use inc,dec calls for FETCH-OP flavors James Bottomley
2016-06-24 17:30 ` Davidlohr Bueso
2016-06-24 17:44 ` James Bottomley
2016-06-24 20:35 ` Davidlohr Bueso
2016-06-24 17:45 ` KY Srinivasan
2016-06-24 19:35 ` Davidlohr Bueso [this message]
2016-06-24 19:17 ` Peter Zijlstra
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