Messages in this thread | | | Subject | Re: Make pipe data structure be a circular list of pages, rather than | From | Alan Cox <> | Date | Fri, 07 Jan 2005 15:45:58 +0000 |
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On Gwe, 2005-01-07 at 14:30, Oleg Nesterov wrote: > will block after writing PIPE_BUFFERS == 16 characters, no? > And pipe_inode_info will use 64K to hold 16 bytes! > > Is it ok?
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
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