On 2009-04-12, Peter Teoh <[email protected]> wrote: > On Sun, Apr 12, 2009 at 11:25 AM, Jeffrey Cao <[email protected]> wrote:
> basic concept is that there 3 types of context: process, hardware > interrupt, and software interrupt. If you think so, what's the difference between hardware interrupt context and software interrupt context? What I know is that there are only two types of contextes: process, and interrupt. Hardware interrupt handler and deferrable functions(including softirq and tasklete) run in interrupt context. > > read this for further details (from LDDv3): > > http://lwn.net/images/pdf/LDD3/ch07.pdf > > within it explained what is a kernel thread. So basically while > running process A in kernel mode, it can be intercepted by any kernel > threads, and these kernel threads therefore "DOES NOT HAVE PROCESS > CONTEXT", as they are not related to the currently running process A, If these threads does not have process context, then what context are they in? hardware interrupt context? software interrupt context? Or you'll create another new context named "thread context"? > and therefore, must observe rules (described in ch07.pdf) like I/O, > sleeping etc. etc. > -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to [email protected] Please read the FAQ at http://kernelnewbies.org/FAQ
