From: Andrew Morton <akpm@osdl.org>
To: Alasdair G Kergon <agk@redhat.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH 6/9] device-mapper snapshot: barriers not supported
Date: Sun, 22 Jan 2006 21:41:11 -0800 [thread overview]
Message-ID: <20060122214111.11170cdc.akpm@osdl.org> (raw)
In-Reply-To: <20060120211759.GG4724@agk.surrey.redhat.com>
Alasdair G Kergon <agk@redhat.com> wrote:
>
> The snapshot and origin targets are incapable of handling barriers and
> need to indicate this.
>
> ...
>
> + if (unlikely(bio_barrier(bio)))
> + return -EOPNOTSUPP;
> +
And what was happening if people _were_ sending such BIOs down? Did it all
appear to work correctly? If so, will this change cause
currently-apparently-working setups to stop working?
next prev parent reply other threads:[~2006-01-23 5:41 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-20 21:17 [PATCH 6/9] device-mapper snapshot: barriers not supported Alasdair G Kergon
2006-01-23 5:41 ` Andrew Morton [this message]
2006-01-23 15:56 ` Lars Marowsky-Bree
2006-01-23 21:14 ` Andrew Morton
2006-01-25 20:55 ` Alasdair G Kergon
2006-01-23 17:01 ` Alasdair G Kergon
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