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authorStefan Hajnoczi <stefanha@linux.vnet.ibm.com>2011-03-29 20:04:41 +0100
committerKevin Wolf <kwolf@redhat.com>2011-04-07 13:51:47 +0200
commit46a4e4e6085c1e5ae498e350009ff6d321d9ee67 (patch)
tree7fed98f269c27d26b150bf5576b86b513bb02af0 /kvm.h
parentb8c6d0958943c96ca9401961a1200568c7ec0268 (diff)
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block: Do not cache device size for removable media
The block layer caches the device size to avoid doing lseek(fd, 0, SEEK_END) every time this value is needed. For removable media the device size becomes stale if a new medium is inserted. This patch simply prevents device size caching for removable media. A smarter solution is to update the cached device size when a new medium is inserted. Given that there are currently bugs with CD-ROM media change I do not want to implement that approach until we've gotten things correct first. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'kvm.h')
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