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From:   Linus Torvalds <torvalds@linux-foundation.org>
Date:   Sun, 16 Feb 2020 18:24:45 -0800
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Subject: Re: Linux 5.6-rc2
To:     Dave Jones <davej@codemonkey.org.uk>,
        Josef Bacik <josef@toxicpanda.com>,
        Filipe Manana <fdmanana@suse.com>,
        David Sterba <dsterba@suse.com>
Cc:     Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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On Sun, Feb 16, 2020 at 6:08 PM Dave Jones <davej@codemonkey.org.uk> wrote:
>
> This didn't happen in rc1, but showed up when I booted into rc2 and
> tried to and pull some stuff with rsync.
>
> [   70.794783] BUG: sleeping function called from invalid context at mm/slab.h:565
> [   70.795459]  kmem_cache_alloc+0x1d3/0x290
> [   70.795471]  alloc_extent_state+0x22/0x1c0
> [   70.795544]  __clear_extent_bit+0x3ba/0x580
> [   70.795569]  btrfs_truncate_inode_items+0x339/0xe50
> [   70.795647]  btrfs_evict_inode+0x269/0x540

At a guess (just by functions involved, and the timing between rc1 and
rc2 - no actual analysis), this is probably due to

    28553fa992cb ("Btrfs: fix race between shrinking truncate and fiemap")

which is also marked for stable, so... Filipe?

              Linus