Date: Fri, 6 Jul 2001 20:19:48 +0530 From: "sumanth vidyadhara" <sumanth.vidyadhara@wipro.com> To: <mjacob@feral.com> Cc: <freebsd-smp@FreeBSD.ORG> Subject: Re: Locks in ethernet drivers Message-ID: <064701c1062a$e7eee230$c9cda8c0@sumanth> References: <20010706070154.Q46987-100000@wonky.feral.com>
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Hi Matthew, How does splxxx work for more than one cpu , splxxx is for that particular cpu isn't it. It raises the priority of cpu of that particular cpu not for all cpu. Then the critical code how is it handled for the other cpu's if they want to access it simultaneously. Regards, Sumanth ----- Original Message ----- From: "Matthew Jacob" <mjacob@feral.com> To: "sumanth vidyadhara" <sumanth.vidyadhara@wipro.com> Cc: <freebsd-smp@FreeBSD.ORG> Sent: Friday, July 06, 2001 7:33 PM Subject: Re: Locks in ethernet drivers > > > On Fri, 6 Jul 2001, sumanth vidyadhara wrote: > > > Hi All, > > What is the call to initialise,acquire and release a lock in the > > ethernet drivers since all the sample code did not implement any > > locks. The version of Freebsd is 4.3. > > In FreeBSD 4.X there is no SMP locking that drivers need know about and > splN/splx has its traditional meaning. > > -matt > > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message
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