From: Arnd Bergmann <arnd@arndb.de>
To: Yegor Yefremov <yegorslists@googlemail.com>
Cc: Arnd Bergmann <arnd@arndb.de>, Ard Biesheuvel <ardb@kernel.org>,
Tony Lindgren <tony@atomide.com>,
Linux-OMAP <linux-omap@vger.kernel.org>,
linux-clk <linux-clk@vger.kernel.org>,
Stephen Boyd <sboyd@kernel.org>,
Linux ARM <linux-arm-kernel@lists.infradead.org>
Subject: Re: am335x: 5.18.x: system stalling
Date: Fri, 3 Jun 2022 22:46:04 +0200 [thread overview]
Message-ID: <CAK8P3a1VeP6YMYV6hh13K1Q3epuO5wRUmTByY7YVVT86J1giqg@mail.gmail.com> (raw)
In-Reply-To: <CAGm1_kuUVKAxcxENnvsq5AGzeXAeXP6yLmjt1MQSpfjdcvZjng@mail.gmail.com>
On Fri, Jun 3, 2022 at 9:11 PM Yegor Yefremov
<yegorslists@googlemail.com> wrote:
>
> With compiled-in drivers the system doesn't stall. All other tests and
> related outputs will come next week.
Ah, nice!
It's probably a reasonable assumption that the smp-patched get_current()
is (at least sometimes) broken in modules but working in the kernel itself.
I suppose that means in the worst case we can hot-fix the issue by
having an 'extern' version of get_current() for the case of
armv6+smp+module ;-)
Maybe start with the ".long 0xe7f001f2" hack I suggested in my last
mail. If that gives you an oops for the module case, then we know
that the patching doesn't work at all and you don't have to try anything
else, otherwise it's more likely that an incorrect instruction sequence
is patched in.
Arnd
WARNING: multiple messages have this Message-ID (diff)
From: Arnd Bergmann <arnd@arndb.de>
To: Yegor Yefremov <yegorslists@googlemail.com>
Cc: Arnd Bergmann <arnd@arndb.de>, Ard Biesheuvel <ardb@kernel.org>,
Tony Lindgren <tony@atomide.com>,
Linux-OMAP <linux-omap@vger.kernel.org>,
linux-clk <linux-clk@vger.kernel.org>,
Stephen Boyd <sboyd@kernel.org>,
Linux ARM <linux-arm-kernel@lists.infradead.org>
Subject: Re: am335x: 5.18.x: system stalling
Date: Fri, 3 Jun 2022 22:46:04 +0200 [thread overview]
Message-ID: <CAK8P3a1VeP6YMYV6hh13K1Q3epuO5wRUmTByY7YVVT86J1giqg@mail.gmail.com> (raw)
In-Reply-To: <CAGm1_kuUVKAxcxENnvsq5AGzeXAeXP6yLmjt1MQSpfjdcvZjng@mail.gmail.com>
On Fri, Jun 3, 2022 at 9:11 PM Yegor Yefremov
<yegorslists@googlemail.com> wrote:
>
> With compiled-in drivers the system doesn't stall. All other tests and
> related outputs will come next week.
Ah, nice!
It's probably a reasonable assumption that the smp-patched get_current()
is (at least sometimes) broken in modules but working in the kernel itself.
I suppose that means in the worst case we can hot-fix the issue by
having an 'extern' version of get_current() for the case of
armv6+smp+module ;-)
Maybe start with the ".long 0xe7f001f2" hack I suggested in my last
mail. If that gives you an oops for the module case, then we know
that the patching doesn't work at all and you don't have to try anything
else, otherwise it's more likely that an incorrect instruction sequence
is patched in.
Arnd
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next prev parent reply other threads:[~2022-06-03 20:46 UTC|newest]
Thread overview: 115+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-04 10:35 am335x: 5.18.x: system stalling Yegor Yefremov
2022-05-05 5:08 ` Tony Lindgren
2022-05-11 14:16 ` Yegor Yefremov
2022-05-12 5:41 ` Tony Lindgren
2022-05-12 5:41 ` Tony Lindgren
2022-05-12 8:14 ` Arnd Bergmann
2022-05-12 8:14 ` Arnd Bergmann
2022-05-12 8:42 ` Arnd Bergmann
2022-05-12 8:42 ` Arnd Bergmann
2022-05-12 10:20 ` Yegor Yefremov
2022-05-12 10:20 ` Yegor Yefremov
2022-05-19 16:52 ` Yegor Yefremov
2022-05-19 16:52 ` Yegor Yefremov
2022-05-21 19:41 ` Arnd Bergmann
2022-05-21 19:41 ` Arnd Bergmann
2022-05-24 13:38 ` Yegor Yefremov
2022-05-24 13:38 ` Yegor Yefremov
2022-05-24 14:19 ` Tony Lindgren
2022-05-24 14:19 ` Tony Lindgren
2022-05-26 5:49 ` Yegor Yefremov
2022-05-26 5:49 ` Yegor Yefremov
2022-05-26 6:20 ` Tony Lindgren
2022-05-26 6:20 ` Tony Lindgren
2022-05-26 8:19 ` Ard Biesheuvel
2022-05-26 8:19 ` Ard Biesheuvel
2022-05-26 12:37 ` Yegor Yefremov
2022-05-26 12:37 ` Yegor Yefremov
2022-05-26 14:15 ` Arnd Bergmann
2022-05-26 14:15 ` Arnd Bergmann
2022-05-27 4:44 ` Yegor Yefremov
2022-05-27 4:44 ` Yegor Yefremov
2022-05-27 6:38 ` Arnd Bergmann
2022-05-27 6:38 ` Arnd Bergmann
2022-05-27 6:50 ` Tony Lindgren
2022-05-27 6:50 ` Tony Lindgren
2022-05-27 6:57 ` Arnd Bergmann
2022-05-27 6:57 ` Arnd Bergmann
2022-05-27 8:17 ` Yegor Yefremov
2022-05-27 8:17 ` Yegor Yefremov
2022-05-27 8:38 ` Arnd Bergmann
2022-05-27 8:38 ` Arnd Bergmann
2022-05-27 9:50 ` Yegor Yefremov
2022-05-27 9:50 ` Yegor Yefremov
2022-05-27 12:53 ` Arnd Bergmann
2022-05-27 12:53 ` Arnd Bergmann
2022-05-27 13:12 ` Ard Biesheuvel
2022-05-27 13:12 ` Ard Biesheuvel
2022-05-27 14:12 ` Arnd Bergmann
2022-05-27 14:12 ` Arnd Bergmann
2022-05-28 5:48 ` Yegor Yefremov
2022-05-28 5:48 ` Yegor Yefremov
2022-05-28 7:53 ` Arnd Bergmann
2022-05-28 7:53 ` Arnd Bergmann
2022-05-28 8:29 ` Yegor Yefremov
2022-05-28 8:29 ` Yegor Yefremov
2022-05-28 9:07 ` Ard Biesheuvel
2022-05-28 9:07 ` Ard Biesheuvel
2022-05-28 13:01 ` Yegor Yefremov
2022-05-28 13:01 ` Yegor Yefremov
2022-05-28 13:13 ` Arnd Bergmann
2022-05-28 13:13 ` Arnd Bergmann
2022-05-28 19:28 ` Yegor Yefremov
2022-05-28 19:28 ` Yegor Yefremov
2022-05-30 10:16 ` Ard Biesheuvel
2022-05-30 10:16 ` Ard Biesheuvel
2022-05-30 12:09 ` Yegor Yefremov
2022-05-30 12:09 ` Yegor Yefremov
2022-05-30 13:54 ` Arnd Bergmann
2022-05-30 13:54 ` Arnd Bergmann
2022-05-30 15:14 ` Ard Biesheuvel
2022-05-30 15:14 ` Ard Biesheuvel
2022-05-31 8:36 ` Yegor Yefremov
2022-05-31 8:36 ` Yegor Yefremov
2022-05-31 14:16 ` Yegor Yefremov
2022-05-31 14:16 ` Yegor Yefremov
2022-05-31 15:22 ` Arnd Bergmann
2022-05-31 15:22 ` Arnd Bergmann
2022-06-01 7:36 ` Yegor Yefremov
2022-06-01 7:36 ` Yegor Yefremov
2022-06-01 7:59 ` Arnd Bergmann
2022-06-01 7:59 ` Arnd Bergmann
2022-06-01 8:08 ` Ard Biesheuvel
2022-06-01 8:08 ` Ard Biesheuvel
2022-06-01 9:27 ` Ard Biesheuvel
2022-06-01 9:27 ` Ard Biesheuvel
2022-06-01 10:03 ` Yegor Yefremov
2022-06-01 10:03 ` Yegor Yefremov
2022-06-01 10:06 ` Ard Biesheuvel
2022-06-01 10:06 ` Ard Biesheuvel
2022-06-01 10:46 ` Yegor Yefremov
2022-06-01 10:46 ` Yegor Yefremov
2022-06-01 10:49 ` Ard Biesheuvel
2022-06-01 10:49 ` Ard Biesheuvel
2022-06-02 10:17 ` Yegor Yefremov
2022-06-02 10:17 ` Yegor Yefremov
2022-06-02 10:37 ` Ard Biesheuvel
2022-06-02 10:37 ` Ard Biesheuvel
2022-06-02 12:27 ` Yegor Yefremov
2022-06-02 12:27 ` Yegor Yefremov
2022-06-03 8:54 ` Yegor Yefremov
2022-06-03 8:54 ` Yegor Yefremov
2022-06-03 9:32 ` Arnd Bergmann
2022-06-03 9:32 ` Arnd Bergmann
2022-06-03 19:11 ` Yegor Yefremov
2022-06-03 19:11 ` Yegor Yefremov
2022-06-03 20:46 ` Arnd Bergmann [this message]
2022-06-03 20:46 ` Arnd Bergmann
2022-06-05 14:59 ` Ard Biesheuvel
2022-06-05 14:59 ` Ard Biesheuvel
2022-06-07 8:55 ` Yegor Yefremov
2022-06-07 8:55 ` Yegor Yefremov
2022-08-12 7:35 ` Arnd Bergmann
2022-08-12 7:35 ` Arnd Bergmann
2022-05-24 14:36 ` Arnd Bergmann
2022-05-24 14:36 ` Arnd Bergmann
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