| commit | 7c5bcc42120119bb46d8b2a422053467bcc7291c | |
| author | Stefan Hajnoczi <stefanha@redhat.com> | |
| Wed, 5 Jul 2017 12:57:33 +0000 (5 13:57 +0100) | ||
| committer | Max Reitz <mreitz@redhat.com> | |
| Tue, 11 Jul 2017 15:45:00 +0000 (11 17:45 +0200) | ||
| tree | a8c47b8a48d3830b1bf7a0eb5e691f0a94293625 | treesnapshot (tar.gz zip) |
| parent | 95c67e3bd747b119aa0a902778e1c20fd7fded7f | commitdiff |
qcow2: make refcount size calculation conservative
The refcount metadata size calculation is inaccurate and can produce
numbers that are too small. This is bad because we should calculate a
conservative number - one that is guaranteed to be large enough.
This patch switches the approach to a fixed point calculation because
the existing equation is hard to solve when inaccuracies are taken care
of.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Message-id: 20170705125738.8777-5-stefanha@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
The refcount metadata size calculation is inaccurate and can produce
numbers that are too small. This is bad because we should calculate a
conservative number - one that is guaranteed to be large enough.
This patch switches the approach to a fixed point calculation because
the existing equation is hard to solve when inaccuracies are taken care
of.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Message-id: 20170705125738.8777-5-stefanha@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
| block/qcow2.c | diffblobblamehistory |