linux-kernel - Re: kswapd0: excessive CPU usage

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 12 Oct 2012 00:08:13 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	Valdis.Kletnieks@...edu
CC:	Jiri Slaby <jirislaby@...il.com>, linux-mm@...ck.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: kswapd0: excessive CPU usage

On 10/11/2012 08:19 PM, Valdis.Kletnieks@...edu wrote:
> # zgrep COMPAC /proc/config.gz
> CONFIG_COMPACTION=y
> 
> Hope that tells you something useful.

It just supports my another theory. This seems to fix it for me:
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1830,8 +1830,8 @@ static inline bool should_continue_reclaim(struct
lruvec *lruvec,
         */
        pages_for_compaction = (2UL << sc->order);

-       pages_for_compaction = scale_for_compaction(pages_for_compaction,
-                                                   lruvec, sc);
+/*     pages_for_compaction = scale_for_compaction(pages_for_compaction,
+                                                   lruvec, sc);*/
        inactive_lru_pages = get_lru_size(lruvec, LRU_INACTIVE_FILE);
        if (nr_swap_pages > 0)
                inactive_lru_pages += get_lru_size(lruvec,
LRU_INACTIVE_ANON);

And for you?

(It's an effective revert of "mm: vmscan: scale number of pages
reclaimed by reclaim/compaction based on failures".)

regards,
-- 
js
suse labs
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/