| Date | Thu, 25 May 2006 09:23:11 -0700 | From | Andrew Morton <> | Subject | Re: [PATCH 04/33] readahead: page flag PG_readahead |
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Wu Fengguang <wfg@mail.ustc.edu.cn> wrote: > > An new page flag PG_readahead is introduced as a look-ahead mark, which > reminds the caller to give the adaptive read-ahead logic a chance to do > read-ahead ahead of time for I/O pipelining. > > It roughly corresponds to `ahead_start' of the stock read-ahead logic. >
This isn't a very revealing description of what this flag does.
> +#define __SetPageReadahead(page) __set_bit(PG_readahead, &(page)->flags)
uh-oh. This is extremly risky. Needs extensive justification, please. - 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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