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From: Matthew Wilcox <willy@infradead.org>
To: Miklos Szeredi <miklos@szeredi.hu>
Cc: Paul Menzel <pmenzel@molgen.mpg.de>,
linux-fsdevel@vger.kernel.org, it+linux-fsdevel@molgen.mpg.de
Subject: Re: `ls` blocked with SSHFS mount
Date: Fri, 17 Jul 2020 13:52:08 +0100 [thread overview]
Message-ID: <20200717125208.GP12769@casper.infradead.org> (raw)
In-Reply-To: <CAJfpegs7qxiA+bKvS3_e_QNJEn+5YQxR=kEQ95W0wRFCeunWKw@mail.gmail.com>
On Fri, Jul 17, 2020 at 02:39:03PM +0200, Miklos Szeredi wrote:
> On Fri, Jul 17, 2020 at 10:07 AM Paul Menzel <pmenzel@molgen.mpg.de> wrote:
> > [105591.121285] INFO: task ls:21242 blocked for more than 120 seconds.
> > [105591.121293] Not tainted 5.7.0-1-amd64 #1 Debian 5.7.6-1
> > [105591.121295] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
> > disables this message.
> > [105591.121298] ls D 0 21242 778 0x00004004
> > [105591.121304] Call Trace:
> > [105591.121319] __schedule+0x2da/0x770
> > [105591.121326] schedule+0x4a/0xb0
> > [105591.121339] request_wait_answer+0x122/0x210 [fuse]
> > [105591.121349] ? finish_wait+0x80/0x80
> > [105591.121357] fuse_simple_request+0x198/0x290 [fuse]
> > [105591.121366] fuse_do_getattr+0xcf/0x2c0 [fuse]
> > [105591.121376] vfs_statx+0x96/0xe0
> >
> > The `ls` process cannot be killed. The SSHFS issue *Fuse sshfs blocks
> > standby (Visual Studio Code?)* from 2018 already reported this for Linux
> > 4.17, and the SSHFS developers asked to report this to the Linux kernel.
>
> This is a very old and fundamental issue. Theoretical solution for
> killing the stuck process exists, but it's not trivial and since the
> above mentioned workarounds work well in all cases it's not high
> priority right now.
What? All you need to do is return -EINTR from fuse_do_getattr() if
there's a fatal signal. What "fundamental issue"?
next prev parent reply other threads:[~2020-07-17 12:52 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <874de72a-e196-66a7-39f7-e7fe8aa678ee@molgen.mpg.de>
2020-07-17 12:39 ` `ls` blocked with SSHFS mount Miklos Szeredi
2020-07-17 12:52 ` Matthew Wilcox [this message]
2020-07-17 13:03 ` Miklos Szeredi
2022-02-18 9:41 ` Paul Menzel
2022-02-18 10:29 ` Miklos Szeredi
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