Messages in this thread | | | Date | Fri, 7 Jan 2005 09:23:39 -0800 (PST) | From | Linus Torvalds <> | Subject | Re: Make pipe data structure be a circular list of pages, rather than |
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On Fri, 7 Jan 2005, Alan Cox wrote: > > That would break stuff, but holding the last page until it fills 4K > would work, or just basic sg coalescing when possible. The pipe > behaviour - particularly size and size of atomic writes is defined by > SuS and there are people who use pipes two ways between apps and use the > guarantees to avoid deadlocks
Hmm.. Are there really any other guarantees than the atomicity guarantee for a PIPE_BUF transfer? I don't see any in SuS..
That said, existing practice obviously always trumps paper standards, and yes, coalescing is possible.
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