From: Ming Lei <ming.lei@redhat.com>
To: Christoph Hellwig <hch@lst.de>
Cc: Jens Axboe <axboe@kernel.dk>,
linux-block@vger.kernel.org,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>,
Dan Williams <dan.j.williams@intel.com>,
yukuai <yukuai3@huawei.com>
Subject: Re: [PATCH V2 2/2] block: fix "Directory XXXXX with parent 'block' already present!"
Date: Mon, 25 Apr 2022 17:18:21 +0800 [thread overview]
Message-ID: <YmZnXeZlip5z0QLm@T590> (raw)
In-Reply-To: <20220425074918.GA10320@lst.de>
On Mon, Apr 25, 2022 at 09:49:18AM +0200, Christoph Hellwig wrote:
> On Sun, Apr 24, 2022 at 05:24:12PM +0800, Ming Lei wrote:
> > > As the debugfs directory use the name of the gendisk, the lifetime rules
> > > should simply match those of the gendisk. If anyone wants to trace
> > > SCSI commands sent before probing the gendisk or after removing it
> > > they can use blktrace on the /dev/sg node.
> >
> > Not sure blktrace can trace on /dev/sg since blktrace works on
> > block_device.
>
> Unless someone broke it recently it does. Take a look at all the mess
> it causes in the blktrace code.
But /dev/sg and /dev/sdX can't be opened by blktrace at the same
time.
Thank,
Ming
next prev parent reply other threads:[~2022-04-25 9:19 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-23 14:39 [PATCH V2 0/2] block: fix "Directory XXXXX with parent 'block' already present!" Ming Lei
2022-04-23 14:39 ` [PATCH V2 1/2] debugfs: fix declaration of debugfs_rename Ming Lei
2022-04-23 14:39 ` [PATCH V2 2/2] block: fix "Directory XXXXX with parent 'block' already present!" Ming Lei
2022-04-23 16:29 ` Christoph Hellwig
2022-04-24 9:24 ` Ming Lei
2022-04-25 7:49 ` Christoph Hellwig
2022-04-25 9:18 ` Ming Lei [this message]
2022-04-24 8:53 ` Hannes Reinecke
2022-04-24 9:28 ` Ming Lei
2022-04-24 11:51 ` Hannes Reinecke
2022-04-24 12:04 ` Ming Lei
2022-04-24 13:45 ` Greg Kroah-Hartman
2022-04-25 1:28 ` Ming Lei
2022-04-25 5:10 ` Greg Kroah-Hartman
2022-04-25 7:48 ` Christoph Hellwig
2022-04-25 7:53 ` Hannes Reinecke
2022-04-25 9:07 ` Ming Lei
2022-04-25 9:32 ` Hannes Reinecke
2022-04-26 3:07 ` Ming Lei
2022-05-23 13:11 ` Yu Kuai
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