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On Mon, Nov 17, 2003 at 08:21:34AM +0000, Tigran Aivazian wrote: > Now, since there is no way to detect EOF, other than by reading an extra > page and discovering that it belongs to the next iteration, we have to do > the lseek(fd, 0, SEEK_SET) anyway. > So, the "auto-rewinding" read would only help the cases where application > doesn't need to differentiate between samples and is happy to just > continuously read chunks packed into pages one by one as fast as > possible. In this case it doesn't need to lseek to 0, so auto-rewinding on > kernel side would prevent it from slowing down. If you're going to repeatedly read from 0 pread() sounds like a good alternative to read() + lseek(), plus no kernel changes required to get rid of the lseek(). -- wli - 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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