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On Wed, May 09, 2007 at 09:35:29PM -0400, derrell@xxxxxxxxx wrote:
>
> The only place that readahead() is used, I think, is in vfs_readahead.c.
> It might make sense for the maintainer of this module to look into using
> posix_fadvise() instead of readahead().
Did you look at the code here :-) ? I'm guessing not....
#if defined(HAVE_LINUX_READAHEAD)
int err = readahead(fromfd, offset, (size_t)rhd->len);
DEBUG(10,("readahead_sendfile: readahead on fd %u,
offset %llu, len %u returned %d\n",
(unsigned int)fromfd,
(unsigned long long)offset,
(unsigned int)rhd->len,
err ));
#elif defined(HAVE_POSIX_FADVISE)
int err = posix_fadvise(fromfd, offset, (off_t)rhd->len,
POSIX_FADV_WILLNEED);
DEBUG(10,("readahead_sendfile: posix_fadvise on fd %u,
offset %llu, len %u returned %d\n",
(unsigned int)fromfd,
(unsigned long long)offset,
(unsigned int)rhd->len,
err ));
#else
if (!rhd->didmsg) {
DEBUG(0,("readahead_sendfile: no readahead on
this platform\n"));
rhd->didmsg = True;
}
#endif
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