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From: Linus Torvalds <torvalds@linux-foundation.org>
To: Cyril Hrubis <chrubis@suse.cz>
Cc: kernel test robot <rong.a.chen@intel.com>,
	Al Viro <viro@zeniv.linux.org.uk>, LKP <lkp@01.org>,
	LKML <linux-kernel@vger.kernel.org>,
	ltp@lists.linux.it
Subject: Re: [LTP] 56cbb429d9: ltp.fs_fill.fail
Date: Thu, 25 Jul 2019 09:32:13 -0700	[thread overview]
Message-ID: <CAHk-=wg+yRjY_AUrjbgrN59OeGAWMF_q=-Dqf2cYtVzoY01j7Q@mail.gmail.com> (raw)
In-Reply-To: <20190725132617.GA23135@rei.lan>

On Thu, Jul 25, 2019 at 6:26 AM Cyril Hrubis <chrubis@suse.cz> wrote:
>
> This looks like mkfs.vfat got EBUSY after the loop device was
> succesfully umounted.

Hmm. Smells like the RCU-delaying got triggered again.

We have that "synchronize_rcu_expedited()" in namespace_unlock(),
which is so that everything should be done by the time we return to
user space.

Al, maybe that RCU synchronization should be after the mntput()s?

               Linus

  reply	other threads:[~2019-07-25 16:32 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-25 11:09 56cbb429d9: ltp.fs_fill.fail kernel test robot
2019-07-25 13:26 ` [LTP] " Cyril Hrubis
2019-07-25 16:32   ` Linus Torvalds [this message]
2019-07-25 18:04     ` Al Viro
2019-07-26  0:00       ` Al Viro

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