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Date:      Thu, 16 Sep 2004 16:48:25 -0400 (EDT)
From:      "Mike Jakubik" <mikej@rogers.com>
To:        "Ariff Abdullah" <skywizard@MyBSD.org.my>
Cc:        current@freebsd.org
Subject:   Re: ad0: TIMEOUT - READ_DMA retrying (2 retries left) LBA=207594611
Message-ID:  <1272.192.168.0.188.1095367705.squirrel@192.168.0.188>
In-Reply-To: <20040917043653.419a8e0e.skywizard@MyBSD.org.my>
References:   <!~!UENERkVCMDkAAQACAAAAAAAAAAAAAAAAABgAAAAAAAAA0VcX9IoJqUaXPS8MjT1PdsKAAAAQAAAAC8YFoRpoaUeE8xMlUnz6pQEAAAAA@telia.com> <20040916201342.A127A5D04@ptavv.es.net> <20040917043653.419a8e0e.skywizard@MyBSD.org.my>

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Ariff Abdullah said:

> On Thu, 16 Sep 2004 13:13:42 -0700
> One more thing to consider, the default scheduler. I found that those
> errors occured with SCHED_4BSD (PREEMPTION or NOT), while SCHED_ULE
> (of course without PREEMPTION, or *else*), nothing such that.
>
> Note that this is *my* case, your mileage may vary.

This sounds about right. I noticed this problem on my system just after
the scheduler change.



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