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
| ||
|
Date: Tue, 27 Feb 2007 02:18:03 +0000 From: Alan <alan@...rguk.ukuu.org.uk> To: Inaky Perez-Gonzalez <inaky@...ux.intel.com> Cc: Christoph Hellwig <hch@...radead.org>, Arjan van de Ven <arjan@...radead.org>, mingo@...hat.com, akpm@...l.org, linux-kernel@...r.kernel.org Subject: Re: [patch 0/2] semaphores: add down_interruptible_timeout() and asm-generic/semaphore.h > Yeah, I need semaphore. This is a hw register that says when the hw > is ready to accept a new command. Code that wants to send commands has > to down the semaphore and then send it. When hw is ready to get a new > command, it sends and IRQ and the IRQ up()s the semaphore. So you need a mutex not a semaphore > > Now, we don't want to hang on that down() forever if the hw spaces out. > If we get a timeout, we can try recovery actions (like resetting it, > for sake of being polite). Makes sense but you can also do that with mutexes, and its mutex_interruptible_timeout() you need I suspect ? Alan - 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/
Powered by blists - more mailing lists