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From: Tony Asleson <tasleson@redhat.com>
To: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: linux-block@vger.kernel.org, linux-ide@vger.kernel.org,
	linux-scsi <linux-scsi@vger.kernel.org>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
	Jens Axboe <axboe@kernel.dk>
Subject: Re: [v4 03/11] dev_vprintk_emit: Increase hdr size
Date: Wed, 26 Aug 2020 13:26:37 -0500
Message-ID: <20dad8a0-9a6d-20b4-b5a1-06648c00008e@redhat.com> (raw)
In-Reply-To: <CAHp75VcwDhHmLbOO2WKkShNYAdLawLx6A5O-4newkCe4XEb3LQ@mail.gmail.com>

On 7/25/20 5:05 AM, Andy Shevchenko wrote:
> On Fri, Jul 24, 2020 at 8:19 PM Tony Asleson <tasleson@redhat.com> wrote:
> 
>> -       char hdr[128];
>> +       char hdr[288];
> 
> This is quite a drastic change for the stack.
> Can you refactor to avoid this?

The only thing I can think of is using a hash of the identifier instead
of the value itself.  This could drastically reduce the stack usage and
data stored in journal, but it makes it kind of clumsy for using.

Would placing this on the heap be acceptable?


  reply index

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-24 17:16 [v4 00/11] Add persistent durable identifier to storage log messages Tony Asleson
2020-07-24 17:16 ` [v4 01/11] struct device: Add function callback durable_name Tony Asleson
2020-07-24 17:16 ` [v4 02/11] create_syslog_header: Add durable name Tony Asleson
2020-07-24 17:16 ` [v4 03/11] dev_vprintk_emit: Increase hdr size Tony Asleson
2020-07-25 10:05   ` Andy Shevchenko
2020-08-26 18:26     ` Tony Asleson [this message]
2020-07-24 17:16 ` [v4 04/11] scsi: Add durable_name for dev_printk Tony Asleson
2020-07-25 10:20   ` Andy Shevchenko
2020-07-24 17:17 ` [v4 05/11] nvme: Add durable name " Tony Asleson
2020-07-25  9:05   ` Sergei Shtylyov
2020-07-25 10:23   ` Andy Shevchenko
2020-07-24 17:17 ` [v4 06/11] libata: Add ata_scsi_durable_name Tony Asleson
2020-07-25  0:48   ` kernel test robot
2020-07-25  1:07   ` kernel test robot
2020-07-25  1:07   ` [RFC PATCH] libata: ata_scsi_durable_name() can be static kernel test robot
2020-07-25  1:18   ` [v4 06/11] libata: Add ata_scsi_durable_name kernel test robot
2020-07-25 10:26   ` Andy Shevchenko
2020-07-24 17:17 ` [v4 07/11] Add durable_name_printk Tony Asleson
2020-07-24 17:17 ` [v4 08/11] libata: use durable_name_printk Tony Asleson
2020-07-24 17:17 ` [v4 09/11] Add durable_name_printk_ratelimited Tony Asleson
2020-07-24 17:17 ` [v4 10/11] print_req_error: Use durable_name_printk_ratelimited Tony Asleson
2020-07-25  9:15   ` Sergei Shtylyov
2020-07-24 17:17 ` [v4 11/11] buffer_io_error: " Tony Asleson
2020-07-25 10:29   ` Andy Shevchenko
2020-07-26 15:10 ` [v4 00/11] Add persistent durable identifier to storage log messages Christoph Hellwig
2020-07-27 15:45   ` Tony Asleson
2020-07-27 16:46     ` Hannes Reinecke
2020-07-27 17:42       ` Tony Asleson
2020-07-27 19:17         ` Douglas Gilbert
2020-07-27 20:27           ` Tony Asleson

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