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From: Nikolaus Rath <Nikolaus@rath.org>
To: fuse-devel <fuse-devel@lists.sourceforge.net>,
        Miklos Szeredi <mszeredi@redhat.com>,
        linux-fsdevel <linux-fsdevel@vger.kernel.org>
Subject: fuse: trying to steal weird page
Date: Wed, 26 Dec 2018 21:43:44 +0000
Message-ID: <87o998m0a7.fsf@vostro.rath.org>
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Hi,

I am seeing relatively regular occurences of

$ sudo dmesg | tail
[21929.138815] fuse: trying to steal weird page
[21929.138821]   page=3D00000000a7dd2617 index=3D64 flags=3D17fffc0000000ad=
, count=3D1, mapcount=3D0, mapping=3D          (null)
[21930.647338] fuse: trying to steal weird page
[21930.647345]   page=3D00000000a07f32af index=3D2848 flags=3D17fffc0000000=
ad, count=3D1, mapcount=3D0, mapping=3D          (null)
[21932.338873] fuse: trying to steal weird page
[21932.338879]   page=3D0000000067e3a012 index=3D64 flags=3D17fffc0000000ad=
, count=3D1, mapcount=3D0, mapping=3D          (null)
[21933.930703] fuse: trying to steal weird page
[21933.930710]   page=3D00000000046feb25 index=3D845 flags=3D17fffc0000000a=
d, count=3D1, mapcount=3D0, mapping=3D          (null)
[21936.163174] fuse: trying to steal weird page
[21936.163180]   page=3D00000000fb80fe27 index=3D0 flags=3D17fffc0000000ad,=
 count=3D1, mapcount=3D0, mapping=3D          (null)

They do not seem to correlate with userspace errors.

(I am debugging a mysterious EBADF error that I get from an nftw() walk
and that disappears when running under strace(), but it its occurence
does not correlate).


What are the implications of the above kernel message? Is there a way to
provide more debugging information?

$ uname -a
Linux vostro.rath.org 4.18.0-0.bpo.1-amd64 #1 SMP Debian 4.18.6-1~bpo9+1 (2=
018-09-13) x86_64 GNU/Linux

Best,
-Nikolaus

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