From: Kerenyi Gabor <wom@tateyama.hu>
To: sanket rathi <sanket@linuxmail.org>, linux-kernel@vger.kernel.org
Subject: Re: interrupt handler
Date: Fri, 23 Aug 2002 13:58:01 +0900 [thread overview]
Message-ID: <200208231207.VAA13142@cttsv008.ctt.ne.jp> (raw)
8/23/2002 8:58:20 PM, "sanket rathi" <sanket@linuxmail.org> wrote:
>hi,
>Can i use spin lock in the interrupt handler for a singlre processor machine. because books says u can not use locks
>but spin lock is some thing diffrent
Yes you can. Spinlocks will be compiled in if you choose SMP even on single processor machine.
But look at the documentation in the kernel source.
I think "lock" in your message is a semaphore in real life.
Spinlocks never sleep - they don't perform task switch and you can use them anywhere, while semaphores
can sleep and you can use them only in user context (not in interrupt or bottom half)
Gabor
next reply other threads:[~2002-08-23 12:03 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-08-23 4:58 Kerenyi Gabor [this message]
-- strict thread matches above, loose matches on Subject: below --
2004-04-15 10:02 Interrupt handler MNH
2004-04-17 18:57 ` Karim Yaghmour
2002-08-23 11:58 interrupt handler sanket rathi
2002-08-23 12:17 ` Richard B. Johnson
2002-08-23 16:17 ` Robert Love
2002-08-23 16:45 ` Richard B. Johnson
2002-08-23 16:52 ` Robert Love
2002-08-23 20:45 ` george anzinger
2002-08-23 6:22 Kerenyi Gabor
2002-08-23 5:45 Kerenyi Gabor
2002-08-23 13:07 ` Richard B. Johnson
2002-08-21 14:25 Interrupt Handler sanket rathi
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