From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Luis Chamberlain <mcgrof@kernel.org>
Cc: Jan Kara <jack@suse.cz>, Kefeng Wang <wangkefeng.wang@huawei.com>,
David Bueso <dave@stgolabs.net>, Tso Ted <tytso@mit.edu>,
Ritesh Harjani <ritesh.list@gmail.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Oliver Sang <oliver.sang@intel.com>,
Matthew Wilcox <willy@infradead.org>,
David Hildenbrand <david@redhat.com>,
Alistair Popple <apopple@nvidia.com>,
linux-mm@kvack.org, Christian Brauner <brauner@kernel.org>,
Hannes Reinecke <hare@suse.de>,
oe-lkp@lists.linux.dev, lkp@intel.com,
John Garry <john.g.garry@oracle.com>,
linux-block@vger.kernel.org, ltp@lists.linux.it,
Pankaj Raghav <p.raghav@samsung.com>,
Daniel Gomez <da.gomez@samsung.com>,
Dave Chinner <david@fromorbit.com>,
gost.dev@samsung.com
Subject: Re: [linux-next:master] [block/bdev] 3c20917120: BUG:sleeping_function_called_from_invalid_context_at_mm/util.c
Date: Mon, 31 Mar 2025 09:45:41 +0200 [thread overview]
Message-ID: <20250331074541.gK4N_A2Q@linutronix.de> (raw)
In-Reply-To: <Z-c6BqCSmAnNxb57@bombadil.infradead.org>
On 2025-03-28 17:08:38 [-0700], Luis Chamberlain wrote:
…
> > Are there some preemption configs under which cond_resched() won't
> > trigger a kernel splat where expected so the only thing I can think of
> > is perhaps some preempt configs don't implicate a sleep? If true,
> > instead of adding might_sleep() to one piece of code (in this case
> > foio_mc_copy()) I wonder if instead just adding it to cond_resched() may
> > be useful.
>
> I think the answer to the above is "no".
I would say so. You need CONFIG_DEBUG_ATOMIC_SLEEP for the might-sleep
magic to work. And then the splat from might_sleep() isn't different
than the one from cond_resched().
>
> Luis
Sebastian
next prev parent reply other threads:[~2025-03-31 16:04 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <202503101536.27099c77-lkp@intel.com>
[not found] ` <20250311-testphasen-behelfen-09b950bbecbf@brauner>
[not found] ` <Z9kEdPLNT8SOyOQT@xsang-OptiPlex-9020>
2025-03-18 8:15 ` Luis Chamberlain
2025-03-18 14:37 ` Matthew Wilcox
2025-03-18 23:17 ` Luis Chamberlain
2025-03-19 2:58 ` Matthew Wilcox
2025-03-19 16:55 ` Luis Chamberlain
2025-03-19 19:16 ` Luis Chamberlain
2025-03-19 19:24 ` Matthew Wilcox
2025-03-20 12:11 ` Luis Chamberlain
2025-03-20 12:18 ` Luis Chamberlain
2025-03-22 23:14 ` Johannes Weiner
2025-03-23 1:02 ` Luis Chamberlain
2025-03-23 7:07 ` Luis Chamberlain
2025-03-25 6:52 ` Oliver Sang
2025-03-28 1:44 ` Luis Chamberlain
2025-03-28 4:21 ` Luis Chamberlain
2025-03-28 9:47 ` Luis Chamberlain
2025-03-28 19:09 ` Luis Chamberlain
2025-03-29 0:08 ` Luis Chamberlain
2025-03-29 1:06 ` Luis Chamberlain
2025-03-31 7:45 ` Sebastian Andrzej Siewior [this message]
2025-04-08 16:43 ` Darrick J. Wong
2025-04-08 17:06 ` Luis Chamberlain
2025-04-08 17:24 ` Luis Chamberlain
2025-04-08 17:48 ` Darrick J. Wong
2025-04-08 17:51 ` Matthew Wilcox
2025-04-08 18:02 ` Darrick J. Wong
2025-04-08 18:51 ` Matthew Wilcox
2025-04-08 19:13 ` Luis Chamberlain
2025-04-08 19:13 ` Luis Chamberlain
2025-04-08 18:06 ` Luis Chamberlain
2025-03-20 1:24 ` Lai, Yi
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