Re: [Nbd] maximum size of a read/write request
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Re: [Nbd] maximum size of a read/write request
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From: Wouter V. <w...@ut...> - 2011-10-10 16:33:34
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On Mon, Oct 10, 2011 at 03:05:10PM +0200, Paolo Bonzini wrote: > > That is too tricky: a new kernel version might show differnt > > behaviour. Imho we should specify a limit or make it configurable or > > put it in the protocol. We have 124 bytes of handshake left, we can > > use 8 of them for a maximum blocksize. > > O_DIRECT bypasses everything clever that the kernel might do. More to the point, O_DIRECT is _defined_ as "don't try to be clever about this request, just do it". If a new kernel version were to show different behaviour, that would be a bug in the kernel. -- The volume of a pizza of thickness a and radius z can be described by the following formula: pi zz a |
