Re: lockdep reports possible recursive locking for sb_writers from do_iter_write and do_sendfile

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To: Andrei Vagin <avagin@xxxxxxxxx>
Subject: Re: lockdep reports possible recursive locking for sb_writers from do_iter_write and do_sendfile
From: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Date: Fri, 7 Jul 2017 16:42:08 +0100
Cc: linux-fsdevel <linux-fsdevel@xxxxxxxxxxxxxxx>, LKML <linux-kernel@xxxxxxxxxxxxxxx>
In-reply-to: <CANaxB-zrn8JZ=H8y2acmViiuEvSDRorsoreA7yC+05swU+uWag@mail.gmail.com>
User-agent: Mutt/1.8.0 (2017-02-23)

On Fri, Jul 07, 2017 at 08:27:47AM -0700, Andrei Vagin wrote:
> Hello,
> 
> We run CRIU tests for Linus' tree and today we found this warning:

See vfs.git#work.read_write; the fix is there and it'll go to Linus
today.

References:
- lockdep reports possible recursive locking for sb_writers from do_iter_write and do_sendfile
  - From: Andrei Vagin

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