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Re: [PATCHv2] powerpc: ABI change - add HWCAP/HWCAP2/platform info to TCB
- From: "Carlos O'Donell" <carlos at redhat dot com>
- To: munroesj at linux dot vnet dot ibm dot com
- Cc: Carlos Eduardo Seo <cseo at linux dot vnet dot ibm dot com>, GNU C Library <libc-alpha at sourceware dot org>, "Steven J. Munroe" <sjmunroe at us dot ibm dot com>, Tulio Machado <tuliom at linux dot vnet dot ibm dot com>
- Date: Thu, 27 Aug 2015 16:14:41 -0400
- Subject: Re: [PATCHv2] powerpc: ABI change - add HWCAP/HWCAP2/platform info to TCB
- Authentication-results: sourceware.org; auth=none
- References: <C6F0963E-DA8E-48B3-B6F6-8D6A4C399AED at linux dot vnet dot ibm dot com> <55DE2452 dot 1000907 at redhat dot com> <1440643271 dot 31963 dot 17 dot camel at oc7878010663> <1440643752 dot 3213 dot 4 dot camel at oc7878010663> <55DF11D0 dot 2090100 at redhat dot com> <1440706010 dot 11409 dot 14 dot camel at oc7878010663>
On 08/27/2015 04:06 PM, Steven Munroe wrote:
> QED a Clone syscall is effectively a full barrier (Sequentially
> Consistent) between stores in the thread parent and loads in the thread
> child.
>
> You can inspect the kernels context switch code yourself ;)
Thank you for those notes. I've bookmarked this thread for future
reference when it comes to talking to the kernel people if this
breaks.
I am happy to see that it's more or less spelled out the the ISA,
even if it's a "should" ;-)
Cheers,
Carlos.