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From: Chris Down <chris@chrisdown.name>
To: Qu Wenruo <quwenruo.btrfs@gmx.com>
Cc: Qu Wenruo <wqu@suse.com>,
	linux-btrfs@vger.kernel.org, kernel-team@fb.com
Subject: Re: [PATCH v2 2/2] btrfs: qgroup: add sysfs interface for debug
Date: Thu, 16 Jul 2020 09:41:17 +0100	[thread overview]
Message-ID: <20200716084117.GD2140@chrisdown.name> (raw)
In-Reply-To: <ecb9e5b9-5026-ff4b-75e2-41b156c431b2@gmx.com>

Qu Wenruo writes:
>
>
>On 2020/7/16 上午8:40, Chris Down wrote:
>> Qu Wenruo writes:
>>> Would you please provide the full call trace (especially the address
>>> causing the NULL pointer deref) and the reproducer (if possible)?
>>
>> I'll try to reproduce it again when I have time. I didn't have kdump
>> set, and am not currently running linux-next, so until then, you can
>> have this crappy photo that I rushed to take earlier before panic=30
>> took effect :-)
>
>The linux-next is using an older version of that patch, which has a bad
>memory allocation inside atomic critical section.
>
>If you're unlucky enough, it could cause various weird bugs.
>Thankfully, David has exposed it and the latest version in btrfs tree
>should have it fixed.

Great, thanks! When I run my tests again on linux-next I'll be sure to reapply 
the latest version of your patch first, then.

Thanks,

Chris

      reply	other threads:[~2020-07-16  8:41 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-28  5:07 [PATCH v2 0/2] btrfs: add sysfs interface for qgroup Qu Wenruo
2020-06-28  5:07 ` [PATCH v2 1/2] btrfs: use __u16 for the return value of btrfs_qgroup_level() Qu Wenruo
2020-06-28  5:07 ` [PATCH v2 2/2] btrfs: qgroup: add sysfs interface for debug Qu Wenruo
2020-06-29 21:30   ` David Sterba
2020-06-29 23:17     ` Qu Wenruo
2020-06-30  8:07       ` David Sterba
2020-06-30 14:27         ` David Sterba
2020-06-30 16:57   ` David Sterba
2020-07-01  0:06     ` Qu Wenruo
2020-07-15 13:49   ` Chris Down
2020-07-16  0:15     ` Qu Wenruo
2020-07-16  0:25       ` Chris Down
2020-07-16  0:27       ` Qu Wenruo
     [not found]         ` <20200716004031.GC2140@chrisdown.name>
2020-07-16  1:51           ` Qu Wenruo
2020-07-16  6:21           ` Qu Wenruo
2020-07-16  8:41             ` Chris Down [this message]

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