From: Furquan Shaikh <furquan.m.shaikh@gmail.com>
To: qemu-devel@nongnu.org
Subject: [Qemu-devel] Doubt about COW feature of QCOW2
Date: Mon, 9 Nov 2009 15:52:55 +0530 [thread overview]
Message-ID: <b8ef0f060911090222u203ac330pcdfcc374974d9b16@mail.gmail.com> (raw)
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Hello All,
I had a doubt about the COW implementation of QCOW2.
Suppose two clusters point to the same address, then in that case, the
QCOW_OFLAG_COPIED is cleared in the l2 entries for both the clusters.
Now suppose a write is made to any one of the clusters, then how is the
other cluster identified, in order to set the QCOW_OFLAG_COPIED since only
reference is left.
Thanks in advance,
Furquan
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reply other threads:[~2009-11-09 10:23 UTC|newest]
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