From: Christoph Hellwig <hch@infradead.org>
To: Fam Zheng <famz@redhat.com>
Cc: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
linux-nvme@lists.infradead.org,
virtualization@lists.linux-foundation.org,
Keith Busch <keith.busch@intel.com>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>,
Shaohua Li <shli@kernel.org>, Nitin Gupta <ngupta@vflare.org>,
Jiri Kosina <jikos@kernel.org>,
linux-block@vger.kernel.org, dan.j.williams@intel.com,
"Ed L. Cashin" <ed.cashin@acm.org>, Jens Axboe <axboe@kernel.dk>,
linux-raid@vger.kernel.org, David Woodhouse <dwmw2@infradead.org>,
linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org,
Minchan Kim <minchan@kernel.org>,
linux-mtd@lists.infradead.org,
Brian Norris <computersforpeace@gmail.com>,
linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH v2 00/12] gendisk: Generate uevent after attribute available
Date: Wed, 29 Jun 2016 23:24:42 -0700 [thread overview]
Message-ID: <20160630062442.GA19761@infradead.org> (raw)
In-Reply-To: <20160630015953.6888-1-famz@redhat.com>
On Thu, Jun 30, 2016 at 09:59:41AM +0800, Fam Zheng wrote:
> Documentation/kobject.txt:
> > Use the KOBJ_ADD action for when the kobject is first added to the kernel.
> > This should be done only after any attributes or children of the kobject
> > have been initialized properly, as userspace will instantly start to look
> > for them when this call happens.
>
> Unfortunately it seems impossible to fix this generally without touching the
> offending callers. The approach I'm proposing here is adding a flag to
> suppress uevent in add_disk(), which is patch 1, then in later patches, convert
> any caller to only trigger the uevent when attributes are added.
We (or rather Dan) is touching most add_disk callers anyway for the
driverfs_dev removal. Let's just pass the array of attributes to
a disk_add variant and solve the issue for real.
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@infradead.org>
To: Fam Zheng <famz@redhat.com>
Cc: Ulf Hansson <ulf.hansson@linaro.org>,
Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
linux-nvme@lists.infradead.org,
virtualization@lists.linux-foundation.org,
Keith Busch <keith.busch@intel.com>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>,
Shaohua Li <shli@kernel.org>, Nitin Gupta <ngupta@vflare.org>,
Jiri Kosina <jikos@kernel.org>,
linux-block@vger.kernel.org, dan.j.williams@intel.com,
"Ed L. Cashin" <ed.cashin@acm.org>, Jens Axboe <axboe@kernel.dk>,
linux-raid@vger.kernel.org, David Woodhouse <dwmw2@infradead.org>,
linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org,
Minchan Kim <minchan@kernel.org>,
linux-mtd@lists.infradead.org,
Brian Norris <computersforpeace@gmail.com>,
linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH v2 00/12] gendisk: Generate uevent after attribute available
Date: Wed, 29 Jun 2016 23:24:42 -0700 [thread overview]
Message-ID: <20160630062442.GA19761@infradead.org> (raw)
In-Reply-To: <20160630015953.6888-1-famz@redhat.com>
On Thu, Jun 30, 2016 at 09:59:41AM +0800, Fam Zheng wrote:
> Documentation/kobject.txt:
> > Use the KOBJ_ADD action for when the kobject is first added to the kernel.
> > This should be done only after any attributes or children of the kobject
> > have been initialized properly, as userspace will instantly start to look
> > for them when this call happens.
>
> Unfortunately it seems impossible to fix this generally without touching the
> offending callers. The approach I'm proposing here is adding a flag to
> suppress uevent in add_disk(), which is patch 1, then in later patches, convert
> any caller to only trigger the uevent when attributes are added.
We (or rather Dan) is touching most add_disk callers anyway for the
driverfs_dev removal. Let's just pass the array of attributes to
a disk_add variant and solve the issue for real.
_______________________________________________
Linux-nvme mailing list
Linux-nvme@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-nvme
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@infradead.org>
To: Fam Zheng <famz@redhat.com>
Cc: linux-kernel@vger.kernel.org,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>,
Jens Axboe <axboe@kernel.dk>, "Ed L. Cashin" <ed.cashin@acm.org>,
Jiri Kosina <jikos@kernel.org>,
"Michael S. Tsirkin" <mst@redhat.com>,
Minchan Kim <minchan@kernel.org>, Nitin Gupta <ngupta@vflare.org>,
Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>,
Shaohua Li <shli@kernel.org>,
Ulf Hansson <ulf.hansson@linaro.org>,
David Woodhouse <dwmw2@infradead.org>,
Brian Norris <computersforpeace@gmail.com>,
Keith Busch <keith.busch@intel.com>,
linuxppc-dev@lists.ozlabs.org, linux-block@vger.kernel.org,
virtualization@lists.linux-foundation.org,
linux-raid@vger.kernel.org, linux-mmc@vger.kernel.org,
linux-mtd@lists.infradead.org, linux-nvme@lists.infradead.org,
dan.j.williams@intel.com
Subject: Re: [PATCH v2 00/12] gendisk: Generate uevent after attribute available
Date: Wed, 29 Jun 2016 23:24:42 -0700 [thread overview]
Message-ID: <20160630062442.GA19761@infradead.org> (raw)
In-Reply-To: <20160630015953.6888-1-famz@redhat.com>
On Thu, Jun 30, 2016 at 09:59:41AM +0800, Fam Zheng wrote:
> Documentation/kobject.txt:
> > Use the KOBJ_ADD action for when the kobject is first added to the kernel.
> > This should be done only after any attributes or children of the kobject
> > have been initialized properly, as userspace will instantly start to look
> > for them when this call happens.
>
> Unfortunately it seems impossible to fix this generally without touching the
> offending callers. The approach I'm proposing here is adding a flag to
> suppress uevent in add_disk(), which is patch 1, then in later patches, convert
> any caller to only trigger the uevent when attributes are added.
We (or rather Dan) is touching most add_disk callers anyway for the
driverfs_dev removal. Let's just pass the array of attributes to
a disk_add variant and solve the issue for real.
WARNING: multiple messages have this Message-ID (diff)
From: hch@infradead.org (Christoph Hellwig)
Subject: [PATCH v2 00/12] gendisk: Generate uevent after attribute available
Date: Wed, 29 Jun 2016 23:24:42 -0700 [thread overview]
Message-ID: <20160630062442.GA19761@infradead.org> (raw)
In-Reply-To: <20160630015953.6888-1-famz@redhat.com>
On Thu, Jun 30, 2016@09:59:41AM +0800, Fam Zheng wrote:
> Documentation/kobject.txt:
> > Use the KOBJ_ADD action for when the kobject is first added to the kernel.
> > This should be done only after any attributes or children of the kobject
> > have been initialized properly, as userspace will instantly start to look
> > for them when this call happens.
>
> Unfortunately it seems impossible to fix this generally without touching the
> offending callers. The approach I'm proposing here is adding a flag to
> suppress uevent in add_disk(), which is patch 1, then in later patches, convert
> any caller to only trigger the uevent when attributes are added.
We (or rather Dan) is touching most add_disk callers anyway for the
driverfs_dev removal. Let's just pass the array of attributes to
a disk_add variant and solve the issue for real.
next prev parent reply other threads:[~2016-06-30 6:24 UTC|newest]
Thread overview: 71+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-30 1:59 [PATCH v2 00/12] gendisk: Generate uevent after attribute available Fam Zheng
2016-06-30 1:59 ` Fam Zheng
2016-06-30 1:59 ` Fam Zheng
2016-06-30 1:59 ` [PATCH v2 01/12] genhd: Add "gen_uevent" parameter to add_disk Fam Zheng
2016-06-30 1:59 ` Fam Zheng
2016-06-30 1:59 ` Fam Zheng
2016-06-30 1:59 ` [PATCH v2 02/12] genhd: Honor gen_uevent and add disk_gen_uevents Fam Zheng
2016-06-30 1:59 ` Fam Zheng
2016-06-30 1:59 ` Fam Zheng
2016-06-30 3:26 ` kbuild test robot
2016-06-30 3:26 ` kbuild test robot
2016-06-30 3:26 ` kbuild test robot
2016-06-30 1:59 ` [PATCH v2 03/12] virtio-blk: Generate uevent after attribute available Fam Zheng
2016-06-30 1:59 ` Fam Zheng
2016-06-30 1:59 ` Fam Zheng
2016-06-30 1:59 ` [PATCH v2 04/12] axonrom: " Fam Zheng
2016-06-30 1:59 ` Fam Zheng
2016-06-30 1:59 ` Fam Zheng
2016-06-30 22:10 ` Dan Williams
2016-06-30 22:10 ` Dan Williams
2016-06-30 22:10 ` Dan Williams
2016-07-01 1:03 ` Fam Zheng
2016-07-01 1:03 ` Fam Zheng
2016-07-01 1:03 ` Fam Zheng
2016-06-30 22:10 ` Dan Williams
2016-06-30 1:59 ` [PATCH v2 05/12] aoeblk: " Fam Zheng
2016-06-30 1:59 ` Fam Zheng
2016-06-30 1:59 ` Fam Zheng
2016-07-01 0:57 ` Ed Cashin
2016-07-01 0:57 ` Ed Cashin
2016-07-01 0:57 ` Ed Cashin
2016-07-01 0:57 ` Ed Cashin
2016-06-30 1:59 ` [PATCH v2 06/12] mtip32xx: " Fam Zheng
2016-06-30 1:59 ` Fam Zheng
2016-06-30 1:59 ` Fam Zheng
2016-06-30 1:59 ` [PATCH v2 07/12] pktcdvd: " Fam Zheng
2016-06-30 1:59 ` Fam Zheng
2016-06-30 1:59 ` Fam Zheng
2016-06-30 1:59 ` [PATCH v2 08/12] zram: " Fam Zheng
2016-06-30 1:59 ` Fam Zheng
2016-06-30 1:59 ` Fam Zheng
2016-06-30 1:59 ` [PATCH v2 09/12] md: " Fam Zheng
2016-06-30 1:59 ` Fam Zheng
2016-06-30 1:59 ` Fam Zheng
2016-06-30 1:59 ` [PATCH v2 10/12] mmc: " Fam Zheng
2016-06-30 1:59 ` Fam Zheng
2016-06-30 1:59 ` Fam Zheng
2016-06-30 1:59 ` [PATCH v2 11/12] mtd: " Fam Zheng
2016-06-30 1:59 ` Fam Zheng
2016-06-30 1:59 ` Fam Zheng
2016-06-30 1:59 ` [PATCH v2 12/12] nvme: " Fam Zheng
2016-06-30 1:59 ` Fam Zheng
2016-06-30 1:59 ` Fam Zheng
2016-06-30 6:24 ` Christoph Hellwig [this message]
2016-06-30 6:24 ` [PATCH v2 00/12] gendisk: " Christoph Hellwig
2016-06-30 6:24 ` Christoph Hellwig
2016-06-30 6:24 ` Christoph Hellwig
2016-06-30 6:35 ` Fam Zheng
2016-06-30 6:35 ` Fam Zheng
2016-06-30 6:35 ` Fam Zheng
2016-06-30 6:38 ` Christoph Hellwig
2016-06-30 6:38 ` Christoph Hellwig
2016-06-30 6:38 ` Christoph Hellwig
2016-07-01 1:01 ` Fam Zheng
2016-07-01 1:01 ` Fam Zheng
2016-07-01 1:01 ` Fam Zheng
2016-07-01 1:29 ` Dan Williams
2016-07-01 1:29 ` Dan Williams
2016-07-01 1:29 ` Dan Williams
2016-07-01 1:29 ` Dan Williams
2016-07-01 1:29 ` Dan Williams
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