From: Christoph Hellwig <hch@infradead.org>
To: "Elliott, Robert (Server Storage)" <Elliott@hp.com>
Cc: Christoph Hellwig <hch@infradead.org>,
Hannes Reinecke <hare@suse.de>,
James Bottomley <jbottomley@parallels.com>,
Ewan Milne <emilne@redhat.com>,
"linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>,
"Hoffmann, Elliot" <elliot.hoffmann@hp.com>,
Yoshihiro Yunomae <yoshihiro.ynomae.ez@hitachi.com>
Subject: Re: [PATCH 21/22] scsi: reduce messages for command failure
Date: Fri, 5 Sep 2014 17:35:11 -0700 [thread overview]
Message-ID: <20140906003511.GC18426@infradead.org> (raw)
In-Reply-To: <94D0CD8314A33A4D9D801C0FE68B402958C2F69F@G9W0745.americas.hpqcorp.net>
On Mon, Sep 01, 2014 at 01:14:23AM +0000, Elliott, Robert (Server Storage) wrote:
> Before this patch set, ratelimited printing was impossible because
> there were so many partial-line printk calls. This patch set
> may resolve that problem.
>
> Multiple related lines may still cause problems; if it prints
> CDB, sense key, and additional sense code on three lines, you
> don't want the CDB and sense key suppressed with the additional
> sense code still sneaking out (because command completions
> are concurrent).
>
> If those issues can be overcome, then I'd favor offering ratelimited
> calls. Maybe the logging level could be used to select the amount,
> like:
> 0 = no prints
> 1..n = ratelimited versions of the prints
> n+1..m = not ratelimited versions of the prints
I don't think an unlimited output into the printk buffer is sensible
with the number of IOPS we get from modern devices. If you need
detailed output you should be using the binary trace buffer.
next prev parent reply other threads:[~2014-09-06 0:35 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-28 17:33 [PATCH 00/22] scsi logging update Hannes Reinecke
2014-08-28 17:33 ` [PATCH 01/22] Remove scsi_cmd_print_sense_hdr() Hannes Reinecke
2014-08-31 21:39 ` Christoph Hellwig
2014-08-28 17:33 ` [PATCH 02/22] aha152x: Remove #ifdef 0 section Hannes Reinecke
2014-08-31 21:40 ` Christoph Hellwig
2014-08-28 17:33 ` [PATCH 03/22] sd: Remove scsi_print_sense() in sd_done() Hannes Reinecke
2014-08-31 21:40 ` Christoph Hellwig
2014-08-28 17:33 ` [PATCH 04/22] scsi: introduce sdev_prefix_printk() Hannes Reinecke
2014-08-31 21:43 ` Christoph Hellwig
2014-09-01 7:54 ` Hannes Reinecke
2014-08-28 17:33 ` [PATCH 05/22] scsi: Use sdev as argument for sense code printing Hannes Reinecke
2014-08-31 21:55 ` Christoph Hellwig
2014-09-01 8:00 ` Hannes Reinecke
2014-08-28 17:33 ` [PATCH 06/22] scsi: stop decoding if scsi_normalize_sense() fails Hannes Reinecke
2014-08-31 22:00 ` Christoph Hellwig
2014-09-01 8:06 ` Hannes Reinecke
2014-08-28 17:33 ` [PATCH 07/22] scsi: do not decode sense extras Hannes Reinecke
2014-08-31 22:06 ` Christoph Hellwig
2014-09-01 8:10 ` Hannes Reinecke
2014-08-28 17:33 ` [PATCH 08/22] scsi: dump sense buffer only for debugging Hannes Reinecke
2014-08-31 22:09 ` Christoph Hellwig
2014-09-01 8:26 ` Hannes Reinecke
2014-08-28 17:33 ` [PATCH 09/22] Use sdev as argument for scsi_print_result Hannes Reinecke
2014-08-31 22:11 ` Christoph Hellwig
2014-09-01 8:43 ` Hannes Reinecke
2014-08-28 17:33 ` [PATCH 10/22] scsi: consolidate scsi_print_status() Hannes Reinecke
2014-08-31 22:14 ` Christoph Hellwig
2014-09-01 8:46 ` Hannes Reinecke
2014-08-28 17:33 ` [PATCH 11/22] Implement scsi_opcode_sa_name Hannes Reinecke
2014-08-28 23:50 ` Douglas Gilbert
2014-08-31 22:16 ` Christoph Hellwig
2014-08-28 17:33 ` [PATCH 12/22] scsi: remove obsolete __scsi_print_command() usages Hannes Reinecke
2014-08-31 22:18 ` Christoph Hellwig
2014-09-01 6:56 ` Hannes Reinecke
2014-08-28 17:33 ` [PATCH 13/22] scsi: use local buffer for printing the opcode Hannes Reinecke
2014-08-31 22:19 ` Christoph Hellwig
2014-09-01 8:57 ` Hannes Reinecke
2014-09-01 14:42 ` Hannes Reinecke
2014-08-28 17:33 ` [PATCH 14/22] scsi: pass in string buffer to __scsi_print_command() Hannes Reinecke
2014-08-28 17:33 ` [PATCH 15/22] scsi: use dev_printk() variants in scsi_print_command() Hannes Reinecke
2014-08-28 17:33 ` [PATCH 16/22] libata: use __scsi_print_command() Hannes Reinecke
2014-08-28 17:33 ` [PATCH 17/22] scsi: print disposition in scsi_print_result() Hannes Reinecke
2014-08-31 22:23 ` Christoph Hellwig
2014-08-28 17:33 ` [PATCH 18/22] scsi_error: format abort error message Hannes Reinecke
2014-08-31 22:25 ` Christoph Hellwig
2014-08-28 17:33 ` [PATCH 19/22] scsi: use local buffer for scsi_log_(send|completion) Hannes Reinecke
2014-08-28 17:33 ` [PATCH 20/22] scsi: align logging messages Hannes Reinecke
2014-08-31 22:25 ` Christoph Hellwig
2014-09-01 1:00 ` Elliott, Robert (Server Storage)
2014-09-06 0:34 ` Christoph Hellwig
2014-09-18 23:58 ` Elliott, Robert (Server Storage)
2014-09-19 6:26 ` Hannes Reinecke
2014-09-19 11:35 ` Christoph Hellwig
2014-09-19 11:56 ` Hannes Reinecke
2014-08-28 17:33 ` [PATCH 21/22] scsi: reduce messages for command failure Hannes Reinecke
2014-08-31 22:28 ` Christoph Hellwig
2014-09-01 1:14 ` Elliott, Robert (Server Storage)
2014-09-06 0:35 ` Christoph Hellwig [this message]
2014-08-28 17:33 ` [PATCH 22/22] sd: Reduce logging output Hannes Reinecke
2014-08-31 22:29 ` Christoph Hellwig
2014-09-03 7:58 ` Hannes Reinecke
2014-08-28 19:24 ` [PATCH 00/22] scsi logging update Douglas Gilbert
2014-08-29 9:48 ` Hannes Reinecke
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