Re: epoll (was Re: [PATCH] async poll for 2.5)

From: Davide Libenzi (davidel@xmailserver.org)
Date: Tue Oct 22 2002 - 14:35:10 EST


On 22 Oct 2002, Charles 'Buck' Krasic wrote:

> So maybe epoll's moment of utility is only transient. It should have
> been in the kernel a long time ago. Is it too late now that AIO is
> imminent?

This is not my call actually. But beside comparing actual performance
between AIO and sys_epoll, one of the advantages that the patch had is
this :

arch/i386/kernel/entry.S | 4
drivers/char/Makefile | 4
fs/Makefile | 4
fs/file_table.c | 4
fs/pipe.c | 36 +
include/asm-i386/poll.h | 1
include/asm-i386/unistd.h | 3
include/linux/fs.h | 4
include/linux/list.h | 5
include/linux/pipe_fs_i.h | 4
include/linux/sys.h | 2
include/net/sock.h | 10
net/ipv4/tcp.c | 4

That is, it has a very little "intrusion" in the original code by plugging
in the existing architecture.

- Davide

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