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On Thu, 13 Apr 2006, Linus Torvalds wrote: > > > On Fri, 14 Apr 2006, Alan Cox wrote: > > > > Quality for whom ? There is a measurable cost to all that extra locking > > which will hurt everyone. Given existing kernels don't make the > > guarantee and SuS v3 does not make the guarantee the apps that need it > > will continue to do the extra work themselves anyway. > > True. Side note: if you want the strange POSIX guarantees that Dan quoted (atomicity between write and fstat), you'd almost have to do it with user-space crapola magic locks. Doing it in the kernel would just be insane, you'd have to have some per-process "IO semaphore". (Doing it in user space _also_ sounds insane, but then you could have a switch like "POSIX me harder, and do all the really stupid things" at compile time or something) Linus - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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