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Date: Fri, 22 Nov 2024 13:35:29 +0100
From: Christoph Hellwig <hch@lst.de>
To: "Darrick J. Wong" <djwong@kernel.org>
Cc: Christoph Hellwig <hch@lst.de>, Zorro Lang <zlang@redhat.com>,
	linux-xfs@vger.kernel.org, fstests@vger.kernel.org,
	Brian Foster <bfoster@redhat.com>,
	Amir Goldstein <amir73il@gmail.com>,
	Josef Bacik <josef@toxicpanda.com>
Subject: Re: [PATCH 01/12] generic/757: fix various bugs in this test
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References: <173197064408.904310.6784273927814845381.stgit@frogsfrogsfrogs> <173197064441.904310.18406008193922603782.stgit@frogsfrogsfrogs> <20241121095624.ecpo67lxtrqqdkyh@dell-per750-06-vm-08.rhts.eng.pek2.redhat.com> <20241121100555.GA4176@lst.de> <20241121101325.GA5608@lst.de> <20241121105248.GA10449@lst.de> <20241121163355.GU9425@frogsfrogsfrogs> <20241121171924.GV9425@frogsfrogsfrogs>
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On Thu, Nov 21, 2024 at 09:19:24AM -0800, Darrick J. Wong wrote:
> Oh, that's with your BLKDISCARD -> BLKZEROOUT change applied, isn't it?
> On my system, 100 loops takes 96 seconds with discard and 639 seconds
> with zeroout.

The discard path is guaranteed to fail after the first iteration, but
that at least happens very quickly..