From: Christoph Hellwig <hch@infradead.org>
To: Hannes Reinecke <hare@suse.de>
Cc: James Bottomley <jbottomley@parallels.com>, linux-scsi@vger.kernel.org
Subject: Re: [PATCH 2/5] scsi_scan: Restrict sequential scan to 256 LUNs
Date: Thu, 27 Mar 2014 07:49:26 -0700 [thread overview]
Message-ID: <20140327144926.GB16958@infradead.org> (raw)
In-Reply-To: <1386673515-87133-3-git-send-email-hare@suse.de>
On Tue, Dec 10, 2013 at 12:05:12PM +0100, Hannes Reinecke wrote:
> Sequential scan for more than 256 LUNs is very fragile as
> LUNs might not be numbered sequentially after that point.
>
> SAM revisions later than SCSI-3 impose a structure on
> LUNs larger than 256, making LUN numbers between 256
> and 16384 illegal.
> SCSI-3, however allows for plain 64-bit numbers with
> no internal structure.
>
> So restrict sequential LUN scan to 256 LUNs and add a
> new blacklist flag 'BLIST_SCSI3LUN' to scan up to
> max_lun devices.
What do you need the blacklist flag for? There's no user of it, and
supporting that many LUNs without REPORT LUNS support doesn't sound very
practical anyway.
next prev parent reply other threads:[~2014-03-27 14:49 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-10 11:05 [PATCH 0/5][RFC] Support 64-bit LUNs Hannes Reinecke
2013-12-10 11:05 ` [PATCH 1/5] scsi: Remove CONFIG_SCSI_MULTI_LUN Hannes Reinecke
2014-03-27 14:47 ` Christoph Hellwig
2013-12-10 11:05 ` [PATCH 2/5] scsi_scan: Restrict sequential scan to 256 LUNs Hannes Reinecke
2014-03-27 14:49 ` Christoph Hellwig [this message]
2014-03-28 8:22 ` Hannes Reinecke
2014-03-28 12:47 ` Christoph Hellwig
2014-03-28 13:19 ` Hannes Reinecke
2013-12-10 11:05 ` [PATCH 3/5] qla2xxx: Restrict max_luns to 16-bit for older HBAs Hannes Reinecke
2013-12-10 18:26 ` Chad Dupuis
2014-05-15 6:38 ` Christoph Hellwig
2014-05-15 8:47 ` Hannes Reinecke
2013-12-10 11:05 ` [PATCH 4/5] scsi: use 64-bit LUNs Hannes Reinecke
2014-03-27 14:52 ` Christoph Hellwig
2013-12-10 11:05 ` [PATCH 5/5] scsi: use 64-bit value for 'max_luns' Hannes Reinecke
2014-03-27 14:52 ` Christoph Hellwig
2014-05-15 6:38 ` [PATCH 0/5][RFC] Support 64-bit LUNs Christoph Hellwig
2014-05-15 6:57 ` Hannes Reinecke
-- strict thread matches above, loose matches on Subject: below --
2014-05-20 11:03 [PATCHv2 0/5] " Hannes Reinecke
2014-05-20 11:03 ` [PATCH 2/5] scsi_scan: Restrict sequential scan to 256 LUNs Hannes Reinecke
2014-05-22 9:08 ` Christoph Hellwig
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