linux-ext4 - [Bug 201631] WARNING: CPU: 11 PID: 29593 at fs/ext4/inode.c:3927 .ext4_set_page

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Date:   Fri, 21 Dec 2018 11:52:36 +0000
From:   bugzilla-daemon@...zilla.kernel.org
To:     linux-ext4@...r.kernel.org
Subject: [Bug 201631] WARNING: CPU: 11 PID: 29593 at fs/ext4/inode.c:3927
 .ext4_set_page_dirty+0x70/0xb0

https://bugzilla.kernel.org/show_bug.cgi?id=201631

--- Comment #36 from erhard_f@...lbox.org ---
(In reply to Benjamin Herrenschmidt from comment #29)
> [...]
> Talking of which, I noticed the AMD GPU driver in the call traces above,
> could it be a similar case of fun with GUP ?

If you are talking about the "[    4.883250] radeon: No suitable DMA available"
message, this has also been the case before kernel 4.20-rc*. There also have
been some DMA-related patches from
https://git.raptorengineering.com/git/op-kernel-dev/log/?h=raptor-dma-dev-4.18-pre.
Don't know if they reslove this error message of if they have been taken
upstream already.

The card is BTW a Radeon HD 6450, which is running fine on the Talos II.

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