On 4/25/05, Aggarwal, Vikas (OFT) <Vikas.Aggarwal@xxxxxxxxxxxxxxx> wrote: > Like to put 2 more questions: > > 1. spin_lock_irqsave disables interrupt on local processor or on all the > processors? It only disables the interrupts on local processor. Protection across other processors is provided by spinlock itself, on local CPU disabling interrupts serve that. > 2. Is that ever required to disable interrupts on all the processors? I dont think, kernel have any construct something like spinlock_irqsave to disable interrupts on all CPUs. You can find one good documentation related to differnet types of spinlocks and there use in documentation directory of kernel sources. -gd -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
