Re: fuse: kernel BUG at mm/truncate.c:763!

Matthew Wilcox
2021-03-18T11:57:17Z

On Thu, Mar 18, 2021 at 11:29:28AM +0000, Luis Henriques wrote:
> On Thu, Mar 18, 2021 at 02:03:02PM +0300, Kirill A. Shutemov wrote:
> > On Thu, Mar 18, 2021 at 11:59:59AM +0100, Miklos Szeredi wrote:
> > > > [16247.536348] page:00000000dfe36ab1 refcount:673 mapcount:0 mapping:00000000f982a7f8 index:0x1400 pfn:0x4c65e00
> > > > [16247.536359] head:00000000dfe36ab1 order:9 compound_mapcount:0 compound_pincount:0
> > >
> > > This is a compound page alright. Have no idea how it got into fuse's
> > > pagecache.
> >
> >
> > Luis, do you have CONFIG_READ_ONLY_THP_FOR_FS enabled?
>
> Yes, it looks like Tumbleweed kernels have that config option enabled by
> default. And it this feature was introduced in 5.4 (the bug doesn't seem
> to be reproducible in 5.3).

Can you try adding this patch?