From: "Jason A. Donenfeld" <Jason@zx2c4.com>
To: Guenter Roeck <linux@roeck-us.net>
Cc: david@redhat.com, linux-kernel@vger.kernel.org,
wsa+renesas@sang-engineering.com, nicholas@linux.ibm.com,
windhl@126.com, cuigaosheng1@huawei.com, mikey@neuling.org,
paul@paul-moore.com, haren@linux.ibm.com, joel@jms.id.au,
lukas.bulwahn@gmail.com, nathanl@linux.ibm.com,
ajd@linux.ibm.com, ye.xingchen@zte.com.cn, npiggin@gmail.com,
nathan@kernel.org, rmclure@linux.ibm.com, hbathini@linux.ibm.com,
atrajeev@linux.vnet.ibm.com, yuanjilin@cdjrlc.com,
pali@kernel.org, farosas@linux.ibm.com, geoff@infradead.org,
Linus Torvalds <torvalds@linux-foundation.org>,
gustavoars@kernel.org, lihuafei1@huawei.com,
aneesh.kumar@linux.ibm.com, zhengyongjun3@huawei.com,
linuxppc-dev@lists.ozlabs.org
Subject: Re: [GIT PULL] Please pull powerpc/linux.git powerpc-6.1-1 tag
Date: Wed, 12 Oct 2022 09:49:26 -0600 [thread overview]
Message-ID: <Y0biBtCUtc2mowbQ@zx2c4.com> (raw)
In-Reply-To: <20221012141827.GA2405914@roeck-us.net>
On Wed, Oct 12, 2022 at 07:18:27AM -0700, Guenter Roeck wrote:
> NIP [c000000000031630] .replay_soft_interrupts+0x60/0x300
> LR [c000000000031964] .arch_local_irq_restore+0x94/0x1c0
> Call Trace:
> [c000000007df3870] [c000000000031964] .arch_local_irq_restore+0x94/0x1c0 (unreliable)
> [c000000007df38f0] [c000000000f8a444] .__schedule+0x664/0xa50
> [c000000007df39d0] [c000000000f8a8b0] .schedule+0x80/0x140
> [c000000007df3a50] [c00000000092f0dc] .try_to_generate_entropy+0x118/0x174
> [c000000007df3b40] [c00000000092e2e4] .urandom_read_iter+0x74/0x140
> [c000000007df3bc0] [c0000000003b0044] .vfs_read+0x284/0x2d0
> [c000000007df3cd0] [c0000000003b0d2c] .ksys_read+0xdc/0x130
> [c000000007df3d80] [c00000000002a88c] .system_call_exception+0x19c/0x330
> [c000000007df3e10] [c00000000000c1d4] system_call_common+0xf4/0x258
Obviously the first couple lines of this concern me a bit. But I think
actually this might just be a catalyst for another bug. You could view
that function as basically just:
while (something)
schedule();
And I guess in the process of calling the scheduler a lot, which toggles
interrupts a lot, something got wedged.
Curious, though, I did try to reproduce this, to no avail. My .config is
https://xn--4db.cc/rBvHWfDZ . What's yours?
Jason
WARNING: multiple messages have this Message-ID (diff)
From: "Jason A. Donenfeld" <Jason@zx2c4.com>
To: Guenter Roeck <linux@roeck-us.net>
Cc: Michael Ellerman <mpe@ellerman.id.au>,
Linus Torvalds <torvalds@linux-foundation.org>,
ajd@linux.ibm.com, aneesh.kumar@linux.ibm.com,
atrajeev@linux.vnet.ibm.com, christophe.leroy@csgroup.eu,
cuigaosheng1@huawei.com, david@redhat.com, farosas@linux.ibm.com,
geoff@infradead.org, gustavoars@kernel.org, haren@linux.ibm.com,
hbathini@linux.ibm.com, joel@jms.id.au, lihuafei1@huawei.com,
linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
lukas.bulwahn@gmail.com, mikey@neuling.org, nathan@kernel.org,
nathanl@linux.ibm.com, nicholas@linux.ibm.com, npiggin@gmail.com,
pali@kernel.org, paul@paul-moore.com, rmclure@linux.ibm.com,
ruscur@russell.cc, windhl@126.com,
wsa+renesas@sang-engineering.com, ye.xingchen@zte.com.cn,
yuanjilin@cdjrlc.com, zhengyongjun3@huawei.com
Subject: Re: [GIT PULL] Please pull powerpc/linux.git powerpc-6.1-1 tag
Date: Wed, 12 Oct 2022 09:49:26 -0600 [thread overview]
Message-ID: <Y0biBtCUtc2mowbQ@zx2c4.com> (raw)
In-Reply-To: <20221012141827.GA2405914@roeck-us.net>
On Wed, Oct 12, 2022 at 07:18:27AM -0700, Guenter Roeck wrote:
> NIP [c000000000031630] .replay_soft_interrupts+0x60/0x300
> LR [c000000000031964] .arch_local_irq_restore+0x94/0x1c0
> Call Trace:
> [c000000007df3870] [c000000000031964] .arch_local_irq_restore+0x94/0x1c0 (unreliable)
> [c000000007df38f0] [c000000000f8a444] .__schedule+0x664/0xa50
> [c000000007df39d0] [c000000000f8a8b0] .schedule+0x80/0x140
> [c000000007df3a50] [c00000000092f0dc] .try_to_generate_entropy+0x118/0x174
> [c000000007df3b40] [c00000000092e2e4] .urandom_read_iter+0x74/0x140
> [c000000007df3bc0] [c0000000003b0044] .vfs_read+0x284/0x2d0
> [c000000007df3cd0] [c0000000003b0d2c] .ksys_read+0xdc/0x130
> [c000000007df3d80] [c00000000002a88c] .system_call_exception+0x19c/0x330
> [c000000007df3e10] [c00000000000c1d4] system_call_common+0xf4/0x258
Obviously the first couple lines of this concern me a bit. But I think
actually this might just be a catalyst for another bug. You could view
that function as basically just:
while (something)
schedule();
And I guess in the process of calling the scheduler a lot, which toggles
interrupts a lot, something got wedged.
Curious, though, I did try to reproduce this, to no avail. My .config is
https://xn--4db.cc/rBvHWfDZ . What's yours?
Jason
next prev parent reply other threads:[~2022-10-12 15:50 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-09 11:01 [GIT PULL] Please pull powerpc/linux.git powerpc-6.1-1 tag Michael Ellerman
2022-10-09 11:01 ` Michael Ellerman
2022-10-09 21:17 ` pr-tracker-bot
2022-10-09 21:17 ` pr-tracker-bot
2022-10-10 19:25 ` Jason A. Donenfeld
2022-10-10 19:25 ` Jason A. Donenfeld
2022-10-10 20:03 ` Jason A. Donenfeld
2022-10-10 20:03 ` Jason A. Donenfeld
2022-10-10 22:26 ` Jason A. Donenfeld
2022-10-10 22:26 ` Jason A. Donenfeld
2022-10-11 0:00 ` Andrew Donnellan
2022-10-11 0:00 ` Andrew Donnellan
2022-10-11 0:13 ` Jason A. Donenfeld
2022-10-11 0:13 ` Jason A. Donenfeld
2022-10-11 1:44 ` Michael Ellerman
2022-10-11 1:44 ` Michael Ellerman
2022-10-11 2:57 ` Jason A. Donenfeld
2022-10-11 2:57 ` Jason A. Donenfeld
2022-10-11 9:34 ` Michael Ellerman
2022-10-11 9:34 ` Michael Ellerman
2022-10-11 1:53 ` Michael Ellerman
2022-10-11 1:53 ` Michael Ellerman
2022-10-11 2:57 ` Jason A. Donenfeld
2022-10-11 2:57 ` Jason A. Donenfeld
2022-10-11 9:35 ` Michael Ellerman
2022-10-11 9:35 ` Michael Ellerman
2022-10-11 11:10 ` Nicholas Piggin
2022-10-11 11:10 ` Nicholas Piggin
2022-10-12 14:18 ` Guenter Roeck
2022-10-12 14:18 ` Guenter Roeck
2022-10-12 15:49 ` Jason A. Donenfeld [this message]
2022-10-12 15:49 ` Jason A. Donenfeld
2022-10-12 16:44 ` Guenter Roeck
2022-10-12 16:44 ` Guenter Roeck
2022-10-12 17:20 ` Jason A. Donenfeld
2022-10-12 17:20 ` Jason A. Donenfeld
2022-10-12 17:48 ` Guenter Roeck
2022-10-12 17:48 ` Guenter Roeck
2022-10-12 18:37 ` Jason A. Donenfeld
2022-10-12 18:37 ` Jason A. Donenfeld
2022-10-13 5:17 ` Nicholas Piggin
2022-10-13 5:17 ` Nicholas Piggin
2022-10-12 22:16 ` Guenter Roeck
2022-10-12 22:16 ` Guenter Roeck
2022-10-13 0:03 ` Michael Ellerman
2022-10-13 0:03 ` Michael Ellerman
2022-10-13 0:21 ` Guenter Roeck
2022-10-13 0:21 ` Guenter Roeck
2022-10-13 5:03 ` Nicholas Piggin
2022-10-13 5:03 ` Nicholas Piggin
2022-10-13 5:19 ` Jason A. Donenfeld
2022-10-13 5:19 ` Jason A. Donenfeld
2022-10-13 5:20 ` Guenter Roeck
2022-10-13 5:20 ` Guenter Roeck
2022-10-13 5:22 ` Nicholas Piggin
2022-10-13 5:22 ` Nicholas Piggin
2022-10-13 4:43 ` Guenter Roeck
2022-10-13 4:43 ` Guenter Roeck
2022-10-13 5:14 ` Nicholas Piggin
2022-10-13 5:14 ` Nicholas Piggin
2022-10-13 18:55 ` Guenter Roeck
2022-10-13 18:55 ` Guenter Roeck
2022-10-12 16:45 ` Jason A. Donenfeld
2022-10-12 16:45 ` Jason A. Donenfeld
2022-10-12 16:49 ` Guenter Roeck
2022-10-12 16:49 ` Guenter Roeck
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