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Re: nptl/tst-stack4 failure

From: Torvald Riegel <triegel at redhat dot com>
To: Florian Weimer <fweimer at redhat dot com>
Cc: Siddhesh Poyarekar <siddhesh at gotplt dot org>, GNU C Library <libc-alpha at sourceware dot org>
Date: Wed, 16 Nov 2016 19:05:26 +0100
Subject: Re: nptl/tst-stack4 failure
Authentication-results: sourceware.org; auth=none
References: <65e7b7ab-986a-81a6-d549-50a66eaf0b8f@redhat.com> <8795ecae-d9eb-7cee-6c2b-ae8c3d271523@gotplt.org> <0ee07a55-673c-f902-c63c-ae64daf0728f@redhat.com>

On Wed, 2016-11-16 at 17:48 +0100, Florian Weimer wrote:
> There is an acquire load on dl_tls_max_dtv_idx in dl-tls.c, but it's 
> never written in an atomic fashion.

Agreed that this is a red flag.  (That doesn't mean that the acquire
load is wrong, just that there might be something else missing that runs
the matching atomic release MO store or similar.)

References:
- nptl/tst-stack4 failure
  - From: Florian Weimer
- Re: nptl/tst-stack4 failure
  - From: Siddhesh Poyarekar
- Re: nptl/tst-stack4 failure
  - From: Florian Weimer

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