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From: Logan Gunthorpe <logang@deltatee.com>
To: Johannes Thumshirn <jthumshirn@suse.de>
Cc: linux-block@vger.kernel.org, linux-nvme@lists.infradead.org,
	Omar Sandoval <osandov@fb.com>,
	Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>,
	Michael Moese <mmoese@suse.de>, Theodore Ts'o <tytso@mit.edu>,
	Stephen Bates <sbates@raithlin.com>
Subject: Re: [PATCH blktests v2 03/12] nvme: Add new test to verify the generation counter
Date: Thu, 18 Jul 2019 09:55:09 -0600	[thread overview]
Message-ID: <1c81c160-7c32-7a88-53ae-ea54030b8d19@deltatee.com> (raw)
In-Reply-To: <20190718070330.GC15760@x250.microfocus.com>



On 2019-07-18 1:03 a.m., Johannes Thumshirn wrote:
> On Wed, Jul 17, 2019 at 11:12:50AM -0600, Logan Gunthorpe wrote:
> [...]
>> +_discovery_genctr() {
>> +	nvme discover -t loop |
>> +		sed -n -e 's/^.*Generation counter \([0-9]\+\).*$/\1/p'
>> +}
> 
> Sorry for not having spotted this in v1, but do we really want to hard-core
> the transport type in a library function?

My opinion is that this is unnecessary until we have users of the
function that need different transport types. It's easy enough for
someone to change when they need it. It's a pretty standard practice in
kernel development to not add a feature that no-one uses.

Logan

WARNING: multiple messages have this Message-ID (diff)
From: logang@deltatee.com (Logan Gunthorpe)
Subject: [PATCH blktests v2 03/12] nvme: Add new test to verify the generation counter
Date: Thu, 18 Jul 2019 09:55:09 -0600	[thread overview]
Message-ID: <1c81c160-7c32-7a88-53ae-ea54030b8d19@deltatee.com> (raw)
In-Reply-To: <20190718070330.GC15760@x250.microfocus.com>



On 2019-07-18 1:03 a.m., Johannes Thumshirn wrote:
> On Wed, Jul 17, 2019@11:12:50AM -0600, Logan Gunthorpe wrote:
> [...]
>> +_discovery_genctr() {
>> +	nvme discover -t loop |
>> +		sed -n -e 's/^.*Generation counter \([0-9]\+\).*$/\1/p'
>> +}
> 
> Sorry for not having spotted this in v1, but do we really want to hard-core
> the transport type in a library function?

My opinion is that this is unnecessary until we have users of the
function that need different transport types. It's easy enough for
someone to change when they need it. It's a pretty standard practice in
kernel development to not add a feature that no-one uses.

Logan

  reply	other threads:[~2019-07-18 15:55 UTC|newest]

Thread overview: 53+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-17 17:12 [PATCH blktests v2 00/12] Fix nvme block test issues Logan Gunthorpe
2019-07-17 17:12 ` Logan Gunthorpe
2019-07-17 17:12 ` [PATCH blktests v2 01/12] Add filter function for nvme discover Logan Gunthorpe
2019-07-17 17:12   ` Logan Gunthorpe
2019-07-18  6:58   ` Johannes Thumshirn
2019-07-18  6:58     ` Johannes Thumshirn
2019-07-17 17:12 ` [PATCH blktests v2 02/12] nvme: More agressively filter the discovery output Logan Gunthorpe
2019-07-18  6:59   ` Johannes Thumshirn
2019-07-18  6:59     ` Johannes Thumshirn
2019-07-17 17:12 ` [PATCH blktests v2 03/12] nvme: Add new test to verify the generation counter Logan Gunthorpe
2019-07-17 17:12   ` Logan Gunthorpe
2019-07-18  7:03   ` Johannes Thumshirn
2019-07-18  7:03     ` Johannes Thumshirn
2019-07-18 15:55     ` Logan Gunthorpe [this message]
2019-07-18 15:55       ` Logan Gunthorpe
2019-07-17 17:12 ` [PATCH blktests v2 04/12] nvme/003,004: Add missing calls to nvme disconnect Logan Gunthorpe
2019-07-17 17:12   ` [PATCH blktests v2 04/12] nvme/003, 004: " Logan Gunthorpe
2019-07-18  7:03   ` [PATCH blktests v2 04/12] nvme/003,004: " Johannes Thumshirn
2019-07-18  7:03     ` Johannes Thumshirn
2019-07-17 17:12 ` [PATCH blktests v2 05/12] nvme/005: Don't rely on modprobing to set the multipath paramater Logan Gunthorpe
2019-07-17 17:12   ` Logan Gunthorpe
2019-07-18  7:04   ` Johannes Thumshirn
2019-07-18  7:04     ` Johannes Thumshirn
2019-07-17 17:12 ` [PATCH blktests v2 06/12] nvme/015: Ensure the namespace is flushed not the char device Logan Gunthorpe
2019-07-17 17:12   ` Logan Gunthorpe
2019-07-18  7:04   ` Johannes Thumshirn
2019-07-18  7:04     ` Johannes Thumshirn
2019-07-17 17:12 ` [PATCH blktests v2 07/12] nvme/018: Ignore error message generated by nvme read Logan Gunthorpe
2019-07-17 17:12   ` Logan Gunthorpe
2019-07-18  7:05   ` Johannes Thumshirn
2019-07-18  7:05     ` Johannes Thumshirn
2019-07-17 17:12 ` [PATCH blktests v2 08/12] check: Add the ability to call a cleanup function after a test ends Logan Gunthorpe
2019-07-17 17:12   ` Logan Gunthorpe
2019-07-18  7:07   ` Johannes Thumshirn
2019-07-18  7:07     ` Johannes Thumshirn
2019-07-17 17:12 ` [PATCH blktests v2 09/12] nvme: Cleanup modprobe lines into helper functions Logan Gunthorpe
2019-07-17 17:12   ` Logan Gunthorpe
2019-07-18  7:07   ` Johannes Thumshirn
2019-07-18  7:07     ` Johannes Thumshirn
2019-07-17 17:12 ` [PATCH blktests v2 10/12] nvme: Ensure all ports and subsystems are removed on cleanup Logan Gunthorpe
2019-07-17 17:12   ` Logan Gunthorpe
2019-07-18  7:08   ` Johannes Thumshirn
2019-07-18  7:08     ` Johannes Thumshirn
2019-07-17 17:12 ` [PATCH blktests v2 11/12] common: Use sysfs instead of modinfo for _have_module_param() Logan Gunthorpe
2019-07-17 17:12   ` Logan Gunthorpe
2019-07-18  7:08   ` Johannes Thumshirn
2019-07-18  7:08     ` Johannes Thumshirn
2019-07-17 17:12 ` [PATCH blktests v2 12/12] nvme: Ignore errors when removing modules Logan Gunthorpe
2019-07-17 17:12   ` Logan Gunthorpe
2019-07-18  7:09   ` Johannes Thumshirn
2019-07-18  7:09     ` Johannes Thumshirn
2019-07-29 17:31 ` [PATCH blktests v2 00/12] Fix nvme block test issues Omar Sandoval
2019-07-29 17:31   ` Omar Sandoval

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