Wu Fengguang <[email protected]> wrote:
>
> Add look-ahead support to __do_page_cache_readahead(),
> which is needed by the adaptive read-ahead logic.
You'd need to define "look-ahead support" before telling us you've added it ;)
> @@ -302,6 +303,8 @@ __do_page_cache_readahead(struct address
> break;
> page->index = page_offset;
> list_add(&page->lru, &page_pool);
> + if (page_idx == nr_to_read - lookahead_size)
> + __SetPageReadahead(page);
> ret++;
> }
OK. But the __SetPageFoo() things still give me the creeps.
OT: look:
read_unlock_irq(&mapping->tree_lock);
page = page_cache_alloc_cold(mapping);
read_lock_irq(&mapping->tree_lock);
we should have a page allocation function which just allocates a page from
this CPU's per-cpu-pages magazine, and fails if the magazine is empty:
page = alloc_pages_local(mapping_gfp_mask(x)|__GFP_COLD);
if (!page) {
read_unlock_irq(&mapping->tree_lock);
/*
* This will refill the per-cpu-pages magazine
*/
page = page_cache_alloc_cold(mapping);
read_lock_irq(&mapping->tree_lock);
}
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
