linux-kernel - Re: O_DIRECT question

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, 26 Jan 2007 19:52:03 +0300
From:	Viktor <vvp01@...ox.ru>
To:	Mark Lord <lkml@....ca>
CC:	Denis Vlasenko <vda.linux@...glemail.com>,
	Michael Tokarev <mjt@....msk.ru>,
	Phillip Susi <psusi@....rr.com>,
	Linus Torvalds <torvalds@...l.org>,
	Aubrey <aubreylee@...il.com>, Hua Zhong <hzhong@...il.com>,
	Hugh Dickins <hugh@...itas.com>, linux-kernel@...r.kernel.org,
	hch@...radead.org
Subject: Re: O_DIRECT question

Mark Lord wrote:
> You guys need to backup in this thread.
> 
> Every example of O_DIRECT here could be replaced with
> calls to mmap(), msync(), and madvise() (or posix_fadvise).

No. How about handling IO errors? There is no practical way for it with
mmap().

> In addition to being at least as fast as O_DIRECT,
> these have the added benefit of using the page cache 
> (avoiding reads for data already present, handling multiple
> users of the same data, 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/