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Date:   Wed, 02 Jan 2019 15:10:10 +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 #39 from Jan Kara (jack@...e.cz) ---
(In reply to erhard_f from comment #35)
> Created attachment 280117 [details]
> journalctl -k (4.20-rc7 on a Talos II)
> 
> Results with latest patch.

Thanks for the results! Erhard, are you sure this kernel was with the latest
version of the patch? Because the line:

page 137: b_state 21, b_blocknr 2726281, b_mapped 0, b_cleaned 1498120697108,
now 1498125595648

shows that b_mapped is zero effectively meaning that ext4_block_mkwrite() was
never called for the page. Which would be very strange for a page that has
writeable PTE.

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