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Revision 46a4e4e6


Added by Stefan Hajnoczi over 10 years ago

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 <>
Signed-off-by: Kevin Wolf <>


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