From: Joerg Roedel <joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
To: Don Dutile <ddutile-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Cc: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH 1/2 V2] iommu/amd: Add workaround for ERBT1312
Date: Wed, 24 Apr 2013 12:46:17 +0200 [thread overview]
Message-ID: <20130424104616.GH17148@8bytes.org> (raw)
In-Reply-To: <51768B25.1060501-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
On Tue, Apr 23, 2013 at 09:22:45AM -0400, Don Dutile wrote:
> Given other threads on this mail list (and I've seen crashes with same problem)
> where this type of logging during a flood of IOMMU errors will lock up the machine,
> is there something that can be done to break the do-while loop after n iterations
> have been exec'd, so the kernel can progress during a crash ?
In the case of an IOMMU error flood this loop will only run until the
event-log/ppr-log overflows. So it should not turn into an endless loop.
Joerg
WARNING: multiple messages have this Message-ID (diff)
From: Joerg Roedel <joro@8bytes.org>
To: Don Dutile <ddutile@redhat.com>
Cc: Suravee Suthikulanit <suravee.suthikulpanit@amd.com>,
iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/2 V2] iommu/amd: Add workaround for ERBT1312
Date: Wed, 24 Apr 2013 12:46:17 +0200 [thread overview]
Message-ID: <20130424104616.GH17148@8bytes.org> (raw)
In-Reply-To: <51768B25.1060501@redhat.com>
On Tue, Apr 23, 2013 at 09:22:45AM -0400, Don Dutile wrote:
> Given other threads on this mail list (and I've seen crashes with same problem)
> where this type of logging during a flood of IOMMU errors will lock up the machine,
> is there something that can be done to break the do-while loop after n iterations
> have been exec'd, so the kernel can progress during a crash ?
In the case of an IOMMU error flood this loop will only run until the
event-log/ppr-log overflows. So it should not turn into an endless loop.
Joerg
next prev parent reply other threads:[~2013-04-24 10:46 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-15 7:07 [PATCH 1/2 V2] iommu/amd: Add workaround for ERBT1312 suravee.suthikulpanit-5C7GfCeVMHo
2013-04-15 7:07 ` suravee.suthikulpanit
2013-04-18 16:02 ` Joerg Roedel
2013-04-18 16:13 ` Suravee Suthikulanit
2013-04-18 16:13 ` Suravee Suthikulanit
[not found] ` <51701B9F.10003-5C7GfCeVMHo@public.gmane.org>
2013-04-18 16:28 ` Joerg Roedel
2013-04-18 16:28 ` Joerg Roedel
[not found] ` <20130418162856.GA13891-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2013-04-18 16:59 ` Suravee Suthikulanit
2013-04-18 16:59 ` Suravee Suthikulanit
[not found] ` <5170268E.8080706-5C7GfCeVMHo@public.gmane.org>
2013-04-18 18:35 ` Joerg Roedel
2013-04-18 18:35 ` Joerg Roedel
[not found] ` <20130418183538.GA17148-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2013-04-18 18:56 ` Suravee Suthikulpanit
2013-04-18 18:56 ` Suravee Suthikulpanit
[not found] ` <517041EA.70407-5C7GfCeVMHo@public.gmane.org>
2013-04-18 20:06 ` Joerg Roedel
2013-04-18 20:06 ` Joerg Roedel
[not found] ` <20130418200613.GB17148-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2013-04-22 21:43 ` Suravee Suthikulanit
2013-04-22 21:43 ` Suravee Suthikulanit
2013-04-23 13:22 ` Don Dutile
2013-04-23 13:22 ` Don Dutile
[not found] ` <51768B25.1060501-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2013-04-24 10:46 ` Joerg Roedel [this message]
2013-04-24 10:46 ` Joerg Roedel
[not found] ` <20130424104616.GH17148-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2013-04-24 13:52 ` Don Dutile
2013-04-24 13:52 ` Don Dutile
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