linux-kernel - Re: Several tst-robust* tests time out with recent Linux kernel

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Message-ID: <d69d50445284a5e0d98a64862877c1e6ec22a9a8.camel@xry111.site>
Date:   Tue, 14 Nov 2023 17:46:43 +0800
From:   Xi Ruoyao <xry111@...111.site>
To:     "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        libc-alpha@...rceware.org
Cc:     linux-kernel@...r.kernel.org, linux-api@...r.kernel.org,
        linux-mm@...ck.org, linux-arch@...r.kernel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        André Almeida <andrealmeid@...lia.com>
Subject: Re: Several tst-robust* tests time out with recent Linux kernel

On Tue, 2023-11-14 at 02:33 +0800, Xi Ruoyao wrote:
> Hi,
> 
> With Linux 6.7.0-rc1, several tst-robust* tests time out on x86_64:
> 
> FAIL: nptl/tst-robust1
> FAIL: nptl/tst-robust3
> FAIL: nptl/tst-robust4
> FAIL: nptl/tst-robust6
> FAIL: nptl/tst-robust7
> FAIL: nptl/tst-robust9
> 
> This does not happen with Linux 6.6.0.  Do you have some clue about
> it?

Bisected to the kernel commit:

commit 5694289ce183bc3336407a78c8c722a0b9208f9b (HEAD)
Author: peterz@...radead.org <peterz@...radead.org>
Date:   Thu Sep 21 12:45:08 2023 +0200

    futex: Flag conversion
    
    Futex has 3 sets of flags:
    
     - legacy futex op bits
     - futex2 flags
     - internal flags
    
    Add a few helpers to convert from the API flags into the internal
    flags.
    
    Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
    Reviewed-by: Thomas Gleixner <tglx@...utronix.de>
    Reviewed-by: Andr<C3><A9> Almeida <andrealmeid@...lia.com>
    Link: https://lore.kernel.org/r/20230921105247.722140574@noisy.programming.kicks-ass.net

-- 
Xi Ruoyao <xry111@...111.site>
School of Aerospace Science and Technology, Xidian University