On Wed, Apr 20, 2005 at 01:29:10PM -0400, Garrett Wollman wrote: > <<On Wed, 20 Apr 2005 11:52:33 -0400, Brian Fundakowski Feldman <green_at_FreeBSD.ORG> said: > > > I think the first is more useful behavior than the last. Supporting it > > should be exactly the same as supporting what happens if the actual > > filesystem fills up. In this case, the filesystem is being requested to > > write more "than there is room for." > > Returning a short write for operations on regular files would > definitely be considered astonishing. The changes that you have made > should be considered flow control, not admission control, and should > appear to the user no differently than if we were waiting for a slow > disk to write something; i.e., the user thread should be blocked until > either the entire write completes, or the process is interrupted by a > signal. Can you find any evidence that it's acceptable to interleave multiple writers that are doing O_APPEND? At best, to do what you're asking, they could be kept from being interleaved from the context of one specific NFS client host... -- Brian Fundakowski Feldman \'[ FreeBSD ]''''''''''\ <> green_at_FreeBSD.org \ The Power to Serve! \ Opinions expressed are my own. \,,,,,,,,,,,,,,,,,,,,,,\Received on Fri Apr 22 2005 - 13:11:57 UTC
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