Messages in this thread | | | Date | Wed, 14 Sep 2005 21:06:40 -0700 (PDT) | Subject | Re: "Read my lips: no more merges" - aka Linux 2.6.14-rc1 | From | "David S. Miller" <> |
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From: Eric Dumazet <dada1@cosmosbay.com> Date: Tue, 13 Sep 2005 09:04:32 +0200
> And if your process has many files opened, the cost (read : latency) > of open() can be very high, finding a zero bit in a large bit array. ... > I wish a process param could allow open() to take any free fd > available, not > the lowest one. One can always use fcntl(fd, F_DUPFD, > slot) to move a fd on a > specific high slot and always keep the 64 > first fd slots free to speedup the > kernel part at > open()/dup()/socket() time.
Why not just remember the lowest available free slot and start each bitmap search there? This is a quite common technique. - 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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