From: Samuel Thibault <samuel.thibault@eu.citrix.com>
To: xen-devel@lists.xensource.com
Subject: Block WRITE_BARRIER / FLUSH_DISKCACHE operations and parameters
Date: Thu, 7 Feb 2008 16:14:42 +0000 [thread overview]
Message-ID: <20080207161442.GJ4310@implementation.uk.xensource.com> (raw)
Hello,
Nothing is said about parameters to be given along WRITE_BARRIER or
FLUSH_DISKCACHE operations. I guess they are both implicitely supposed
to be write operations? (it's the case for WRITE_BARRIER in the Linux
implementation) If so, would it be fine to allow nr_segments to be 0?
As part of IDE cache flush emulation, I need to issue WRITE_BARRIERs
without issuing any actual write...
Samuel
next reply other threads:[~2008-02-07 16:14 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-07 16:14 Samuel Thibault [this message]
2008-02-08 14:14 ` Block WRITE_BARRIER / FLUSH_DISKCACHE operations and parameters Samuel Thibault
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