linux-kernel - Re: [PATCH] mm/readahead.c: fix regression caused by small readahead limit

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:	Thu, 20 Aug 2015 12:23:53 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Roman Gushchin <klamm@...dex-team.ru>
Cc:	linux-mm <linux-mm@...ck.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com>,
	Jan Kara <jack@...e.cz>, Wu Fengguang <fengguang.wu@...el.com>,
	David Rientjes <rientjes@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] mm/readahead.c: fix regression caused by small readahead limit

On Thu, Aug 20, 2015 at 9:19 AM, Roman Gushchin <klamm@...dex-team.ru> wrote:
> +       max_sane = max(MAX_READAHEAD,
> +                      (node_page_state(numa_node_id(), NR_INACTIVE_FILE) +
> +                       node_page_state(numa_node_id(), NR_FREE_PAGES)) / 2);

No, we're not re-introducing the idiotic and broken per-node logic.
There was a reason it was killed.

There have been other patches suggested that actually use _valid_
heuristics, this is not one of them.

                  Linus
--
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/