linux-kernel - tasklets and queuing.

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>] [day] [month] [year] [list]

Message-ID: <9ff7a3bc0910102036u6e912817hd335d41a5976f30b@mail.gmail.com>
Date:	Sat, 10 Oct 2009 20:36:25 -0700
From:	Joel Fernandes <agnel.joel@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: tasklets and queuing.

Hi Friends,

I have a question about tasklets:

I understand that they are used to defer work during interrupt
handling. What I don't understand is - how do they handle queuing of
deferred work?
Specially with tasklets, if a tasklet is re-scheduled before the
previous scheduling of the same tasklet has a chance to run, then the
tasklet is executed only once - not twice. But what if the work that
the tasklet was supposed to do in these 2 instances were different and
that its function was supposed to be passed 2 different structures?
Shouldn't the tasklet be executed twice with these 2 structures?

I know that work queues are there for that, but how do device drivers
that use tasklets cope with the above?

Thanks,
-Joel
--
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/