From: Robert Hancock <hancockrwd@gmail.com>
To: Lennert Buytenhek <buytenh@wantstofly.org>
Cc: Andy Yan <ayan@marvell.com>, Ke Wei <kewei@marvell.com>,
Ying Chu <jasonchu@marvell.com>,
linux-ide@vger.kernel.org, linux-scsi@vger.kernel.org
Subject: Re: WARN_ON() in drivers/ata/libata-core.c:5211 ata_qc_issue
Date: Tue, 20 Apr 2010 18:17:01 -0600 [thread overview]
Message-ID: <4BCE43FD.1080303@gmail.com> (raw)
In-Reply-To: <20100420141616.GP4586@mail.wantstofly.org>
On 04/20/2010 08:16 AM, Lennert Buytenhek wrote:
> On mvsas, when I issue a SMART command (smartctl -a) while a dd
> from /dev/sda to /dev/null is in progress, I hit the following
> WARN_ON_ONCE in ata_qc_issue():
>
> if (ata_is_ncq(prot)) {
> WARN_ON_ONCE(link->sactive& (1<< qc->tag));
>
> if (!link->sactive)
> ap->nr_active_links++;
> link->sactive |= 1<< qc->tag;
> } else {
> WARN_ON_ONCE(link->sactive); <===============
>
> ap->nr_active_links++;
> link->active_tag = qc->tag;
> }
>
> This is on 2.6.34-rc4 ish.
That would indicate that for some reason, non-NCQ commands aren't being
deferred while an NCQ command is in progress. Presumably something wrong
in mvsas or libsas code in general..
next prev parent reply other threads:[~2010-04-21 0:17 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-20 14:16 WARN_ON() in drivers/ata/libata-core.c:5211 ata_qc_issue Lennert Buytenhek
2010-04-21 0:17 ` Robert Hancock [this message]
2010-04-21 1:55 ` Jeff Garzik
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