linux-kernel - regarding generic AIO, async syscalls precedent + some benchmarks by lighttpd

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-next>] [day] [month] [year] [list]

Date:	Sun, 4 Feb 2007 23:55:41 +0100
From:	bert hubert <bert.hubert@...herlabs.nl>
To:	Zach Brown <zach.brown@...cle.com>
Cc:	Benjamin LaHaise <bcrl@...ck.org>, Ingo Molnar <mingo@...e.hu>,
	linux-kernel@...r.kernel.org, linux-aio@...ck.org,
	Suparna Bhattacharya <suparna@...ibm.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: regarding generic AIO, async syscalls precedent + some benchmarks by lighttpd

>From two comments posted to my "blog"
http://blog.netherlabs.nl/articles/2007/02/04/a-synchronous-programming

Excerpted from the diary of Dragonfly BSD,
http://www.dragonflybsd.org/status/diary.shtml 

 Remove the asynchronous syscall interface. It was an idea before its time.
 However, keep the formalization of the syscall arguments structures.

The original async syscall interface was committed in
http://leaf.dragonflybsd.org/mailarchive/commits/2004-08/msg00067.html

Comment by Jan Kneschke, lighttpd developer, noting the lack of and need for
aio_stat():

 Reading this article feels like reading the code I wrote in the last days
 for lighttpd. Even if the network-io was async since the start
 (non-blocking), the file-io wasn't. Worst of all was the stat() syscall
 which doesn't have a async interface even in POSIX AIO. So it had to be
 implemented with threads on our own. At http://www.lighttpd.net/benchmark/
 you can see the impact of async vs. blocking syscalls.

Perhaps relevant.

-- 
http://www.PowerDNS.com      Open source, database driven DNS Software 
http://netherlabs.nl              Open and Closed source services
-
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/