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Date:      Sun, 8 Apr 2018 14:41:09 -0400
From:      George Mitchell <george+freebsd@m5p.com>
To:        freebsd-stable@freebsd.org
Subject:   Re: more data: SCHED_ULE+PREEMPTION is the problem
Message-ID:  <3323e648-65a9-6270-3b0f-59064e4203de@m5p.com>
In-Reply-To: <paak11$vcf$1@oper.dinoex.de>
References:  <pa17m7$82t$1@oper.dinoex.de> <paak11$vcf$1@oper.dinoex.de>

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From: George Mitchell <george+freebsd@m5p.com>
To: freebsd-stable@freebsd.org
Message-ID: <3323e648-65a9-6270-3b0f-59064e4203de@m5p.com>
Subject: Re: more data: SCHED_ULE+PREEMPTION is the problem
References: <pa17m7$82t$1@oper.dinoex.de> <paak11$vcf$1@oper.dinoex.de>
In-Reply-To: <paak11$vcf$1@oper.dinoex.de>

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On 04/07/18 10:18, Peter wrote:
> [...]
> B. Findings:
> ------------
> 1. Filesystem
>=20
> I could never reproduce this when reading from plain UFS. Only when
> reading from ZFS (direct or via l2arc).
> [...]
My consistent way of reproducing the problem was to run ports/misc/dnetc
while trying to buildworld/buildkernel.  But I was always building on a
UFS partition.  I don't know why your results would be different.
-- George


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