linux-kernel - __link_block_group uses GFP

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Message-ID: <CABxMtgcGod=FvgHagua07bzPjc7cy_+v0hkbTvwH_7GggOh9Ow@mail.gmail.com>
Date:   Fri, 24 Mar 2017 12:02:21 +0300
From:   Denis Kirjanov <dkirjanov@...udlinux.com>
To:     linux-btrfs@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, chris.mason@...ionio.com
Subject: __link_block_group uses GFP_KERNEL

Hi guys,

Looks like that current code does GFP_KERNEL allocation inside
__link_block_group.
the function invokes kobject_add and internally creates sysfs files
with the GFP_KERNEL flag set.
But since do_chunk_alloc executes insides the btrfs transaction it's
not allowed to sleep.

Thanks!