linux-kernel - Re: [RFC Patch 2/2] mm: Add parameters to limit a rate of outputting memory error messages

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 for Android: free password hash cracker in your pocket

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

Date:	Thu, 11 Apr 2013 16:00:12 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Naoya Horiguchi <n-horiguchi@...jp.nec.com>
Cc:	Mitsuhiro Tanino <mitsuhiro.tanino.gm@...achi.com>,
	Andi Kleen <andi@...stfloor.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-mm <linux-mm@...ck.org>
Subject: Re: [RFC Patch 2/2] mm: Add parameters to limit a rate of
 outputting memory error messages

> I don't think it's enough to do ratelimit only for me_pagecache_dirty().
> When tons of memory errors flood, all of printk()s in memory error handler
> can print out tons of messages.

Note that when you really have a flood of uncorrected errors you'll
likely die soon anyways as something unrecoverable is very likely to
happen. Error memory recovery cannot fix large scale memory corruptions,
just the rare events that slip through all the other memory error correction
schemes.

So I wouldn't worry too much about that.

The flooding problem is typically more with corrected error reporting.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only.
--
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/