From: Roland Dreier <rdreier@cisco.com>
To: Erez Zilber <erezz@Voltaire.COM>
Cc: Pete Wyckoff <pw@osc.edu>, Roland Dreier <rolandd@cisco.com>,
Mike Christie <michaelc@cs.wisc.edu>,
linux-scsi <linux-scsi@vger.kernel.org>
Subject: Re: [PATCH 2/3] iscsi iser: increase max_sectors
Date: Mon, 05 May 2008 13:43:39 -0700 [thread overview]
Message-ID: <adabq3k1nyc.fsf@cisco.com> (raw)
In-Reply-To: <481F0D6A.9050301@Voltaire.COM> (Erez Zilber's message of "Mon, 05 May 2008 16:36:42 +0300")
> This could be problematic because, AFAIK, some HCAs (memfree, I think)
> don't support FMRs of more than 2MB. Roland, am I right?
Mem-free HCAs don't support FMRs where the list of pages is bigger than
a page itself. So yes, with 4 KB pages, you get 512 * 4 KB that way.
Of course the current iSER driver has much bigger FMR problems, since
some adapters don't support FMRs at all...
- R.
next prev parent reply other threads:[~2008-05-05 20:43 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-12 20:52 [PATCH 0/3] iscsi iser limits Pete Wyckoff
2008-02-12 20:54 ` [PATCH 1/3] iscsi iser: remove DMA restrictions Pete Wyckoff
2008-02-12 21:10 ` James Bottomley
2008-02-12 21:46 ` Pete Wyckoff
2008-02-12 21:57 ` James Bottomley
2008-02-13 19:59 ` Pete Wyckoff
2008-02-14 21:10 ` [PATCH 1/3 v2] iscsi iser: remove DMA alignment restriction Pete Wyckoff
2008-05-05 13:19 ` Erez Zilber
2008-04-21 13:51 ` [PATCH 1/3] iscsi iser: remove DMA restrictions Erez Zilber
2008-04-23 13:41 ` [ofa-general] " Erez Zilber
2008-04-23 16:33 ` Mike Christie
2008-04-23 17:16 ` Mike Christie
2008-04-23 17:43 ` Mike Christie
2008-02-14 17:56 ` Mike Christie
2008-02-14 18:10 ` James Bottomley
2008-02-14 18:21 ` Mike Christie
2008-02-14 18:34 ` Mike Christie
2008-02-14 19:04 ` Mike Christie
2008-02-12 20:54 ` [PATCH 2/3] iscsi iser: increase max_sectors Pete Wyckoff
2008-05-05 13:36 ` Erez Zilber
2008-05-05 20:43 ` Roland Dreier [this message]
2008-05-05 17:49 ` Mike Christie
2008-05-07 15:53 ` Pete Wyckoff
2008-05-12 12:10 ` Erez Zilber
2008-02-12 20:54 ` [PATCH 3/3] iscsi iser: increase sg_tablesize Pete Wyckoff
2008-03-02 13:56 ` [PATCH 0/3] iscsi iser limits Erez Zilber
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