Re: About compiler memory barrier for atomic_set/atomic_read on x86

2019-09-03 Thread Yin, Fengwei
Hi Peter, On 9/4/2019 7:38 AM, Yin, Fengwei wrote: Hi Peter, On 9/3/2019 10:06 PM, Peter Zijlstra wrote: On Tue, Sep 03, 2019 at 09:23:41PM +0800, Yin, Fengwei wrote: Hi Peter, There is one question regarding following commit: commit 69d927bba39517d0980462efc051875b7f4db185 Author: Peter Zij

Re: About compiler memory barrier for atomic_set/atomic_read on x86

2019-09-03 Thread Yin, Fengwei
Hi Peter, On 9/3/2019 10:06 PM, Peter Zijlstra wrote: On Tue, Sep 03, 2019 at 09:23:41PM +0800, Yin, Fengwei wrote: Hi Peter, There is one question regarding following commit: commit 69d927bba39517d0980462efc051875b7f4db185 Author: Peter Zijlstra Date: Wed Apr 24 13:38:23 2019 +0200 x

Re: About compiler memory barrier for atomic_set/atomic_read on x86

2019-09-03 Thread Peter Zijlstra
On Tue, Sep 03, 2019 at 09:23:41PM +0800, Yin, Fengwei wrote: > Hi Peter, > There is one question regarding following commit: > > commit 69d927bba39517d0980462efc051875b7f4db185 > Author: Peter Zijlstra > Date: Wed Apr 24 13:38:23 2019 +0200 > > x86/atomic: Fix smp_mb__{before,after}_atomi

About compiler memory barrier for atomic_set/atomic_read on x86

2019-09-03 Thread Yin, Fengwei
Hi Peter, There is one question regarding following commit: commit 69d927bba39517d0980462efc051875b7f4db185 Author: Peter Zijlstra Date: Wed Apr 24 13:38:23 2019 +0200 x86/atomic: Fix smp_mb__{before,after}_atomic() Recent probing at the Linux Kernel Memory Model uncovered a 'sur