From: Luis Chamberlain <mcgrof@kernel.org>
To: Bart Van Assche <bvanassche@acm.org>
Cc: axboe@kernel.dk, viro@zeniv.linux.org.uk,
gregkh@linuxfoundation.org, rostedt@goodmis.org,
mingo@redhat.com, jack@suse.cz, ming.lei@redhat.com,
nstange@suse.de, akpm@linux-foundation.org, mhocko@suse.com,
yukuai3@huawei.com, martin.petersen@oracle.com,
jejb@linux.ibm.com, linux-block@vger.kernel.org,
linux-fsdevel@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, Christoph Hellwig <hch@lst.de>
Subject: Re: [PATCH v7 5/8] loop: be paranoid on exit and prevent new additions / removals
Date: Tue, 23 Jun 2020 16:56:44 +0000 [thread overview]
Message-ID: <20200623165644.GB4332@42.do-not-panic.com> (raw)
In-Reply-To: <14dc9294-fa99-cad0-871b-b69f138e8ac9@acm.org>
On Mon, Jun 22, 2020 at 07:16:15PM -0700, Bart Van Assche wrote:
> On 2020-06-22 05:27, Luis Chamberlain wrote:
> > Note: this will bring you sanity if you try to figure out *why* we still
> > get:
> >
> > [235530.144343] debugfs: Directory 'loop0' with parent 'block' already present!
> > [235530.149477] blktrace: debugfs_dir not present for loop0 so skipping
> > [235530.232328] debugfs: Directory 'loop0' with parent 'block' already present!
> > [235530.238962] blktrace: debugfs_dir not present for loop0 so skipping
> >
> > If you run run_0004.sh from break-blktrace [0]. Even with all my patches
> > merged we still run into this. And so the bug lies within the block
> > layer or on the driver. I haven't been able to find the issue yet.
> >
> > [0] https://github.com/mcgrof/break-blktrace
>
> Thanks Luis for having shared this information. If I can find the time I
> will have a look into this myself.
Let's keep track of it:
https://bugzilla.kernel.org/show_bug.cgi?id=208301
Luis
next prev parent reply other threads:[~2020-06-23 16:56 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-19 20:47 [PATCH v7 0/8] blktrace: fix debugfs use after free Luis Chamberlain
2020-06-19 20:47 ` [PATCH v7 1/8] block: add docs for gendisk / request_queue refcount helpers Luis Chamberlain
2020-06-19 20:47 ` [PATCH v7 2/8] block: clarify context for refcount increment helpers Luis Chamberlain
2020-06-19 20:47 ` [PATCH v7 3/8] block: revert back to synchronous request_queue removal Luis Chamberlain
2020-06-19 20:47 ` [PATCH v7 4/8] blktrace: annotate required lock on do_blk_trace_setup() Luis Chamberlain
2020-06-20 17:02 ` Bart Van Assche
2020-06-19 20:47 ` [PATCH v7 5/8] loop: be paranoid on exit and prevent new additions / removals Luis Chamberlain
2020-06-20 17:11 ` Bart Van Assche
2020-06-22 12:27 ` Luis Chamberlain
2020-06-23 2:16 ` Bart Van Assche
2020-06-23 16:56 ` Luis Chamberlain [this message]
2020-06-23 17:05 ` Johannes Thumshirn
2020-06-24 12:08 ` Luis Chamberlain
2020-06-19 20:47 ` [PATCH v7 6/8] blktrace: fix debugfs use after free Luis Chamberlain
2020-06-20 7:29 ` Christoph Hellwig
2020-06-20 17:31 ` Bart Van Assche
2020-06-22 12:36 ` Luis Chamberlain
2020-06-19 20:47 ` [PATCH v7 7/8] blktrace: ensure our debugfs dir exists Luis Chamberlain
2020-06-20 7:29 ` Christoph Hellwig
2020-06-20 17:33 ` Bart Van Assche
2020-06-19 20:47 ` [PATCH v7 8/8] block: create the request_queue debugfs_dir on registration Luis Chamberlain
2020-06-20 7:30 ` Christoph Hellwig
2020-06-20 18:07 ` Bart Van Assche
2020-06-22 12:42 ` Luis Chamberlain
2020-06-23 3:18 ` Bart Van Assche
2020-06-20 21:18 ` [PATCH v7 0/8] blktrace: fix debugfs use after free Jens Axboe
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