linux-kernel - Re: [PATCH 0/3] Replace kmalloc with vmalloc in seq

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, 22 Sep 2011 23:22:49 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Colin Cross <ccross@...roid.com>
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Alexey Dobriyan <adobriyan@...il.com>
Subject: Re: [PATCH 0/3] Replace kmalloc with vmalloc in seq_files

On Thu, 2011-09-22 at 13:57 -0700, Colin Cross wrote:
> 
> seq_files are often used for debugging data.  When the system is under
> memory pressure, and dumping debugging data starts trying to allocate
> large physically contiguous buffers, it often makes the problem
> worse. 

Shouldn't you be using ->next instead of dumping everything in a single
seqop? That way it can return partial buffers and keep state etc.
--
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/