On 2 February 2002 05:18, Buddy Lumpkin wrote:
> >The only kernels you are likely to see that not happen on are
> >
> >- The 2.4.9 kernel with Rik's patches that Linus didnt take
>
> (Red Hat 2.4.9-*)
>
> >- 2.4.17/18pre with the rmap11/rmap12 patches
> >- 2.4.17/18pre with the -aa patched VM
>
> (which I believe is also in the SuSE kernel packages)
>
> >- 2.2
> >
> >The base VM in Linus tree has been broken since before 2.4.0 and while
> >somewhat better is still that - broken. The major vendors don't ship it
> > for a reason.
>
> Why is this?
>
> Is linus working toward what he believes will be a better impementation? Is
> he just being stubborn?
> I guess I just can't imagine any reason why he would want
> large enterprise applications running poorly when there are obvious fixes.
>
> Believe it or not, im not trying to start a flame war, just trying to
> understand the logic.
Let's not get into politics. I suggest trying -aa kernels. If that solves
your problems, report to lkml, Linus and Marcelo - this will help
Andrea patches to get in mainline 2.5/2.4 faster.
As a minimum, you may try attached patch.
-- vdavmscan.patch.2.4.17.d (author: "M.H.VanLeeuwen" <vanl@megsinet.net>) ==================================================================== --- linux.virgin/mm/vmscan.c Mon Dec 31 12:46:25 2001 +++ linux/mm/vmscan.c Fri Jan 11 18:03:05 2002 @@ -394,9 +394,9 @@ if (PageDirty(page) && is_page_cache_freeable(page) && page->mapping) { /* * It is not critical here to write it only if - * the page is unmapped beause any direct writer + * the page is unmapped because any direct writer * like O_DIRECT would set the PG_dirty bitflag - * on the phisical page after having successfully + * on the physical page after having successfully * pinned it and after the I/O to the page is finished, * so the direct writes to the page cannot get lost. */ @@ -480,11 +480,14 @@ /* * Alert! We've found too many mapped pages on the - * inactive list, so we start swapping out now! + * inactive list. + * Move referenced pages to the active list. */ - spin_unlock(&pagemap_lru_lock); - swap_out(priority, gfp_mask, classzone); - return nr_pages; + if (PageReferenced(page) && !PageLocked(page)) { + del_page_from_inactive_list(page); + add_page_to_active_list(page); + } + continue; } /* @@ -521,6 +524,9 @@ } spin_unlock(&pagemap_lru_lock); + if (max_mapped <= 0 && (nr_pages > 0 || priority < DEF_PRIORITY)) + swap_out(priority, gfp_mask, classzone); + return nr_pages; } - 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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