I will recommend one book to supplement your LDD book. It's called: Understanding the Linux Kernel, 3rd Edition. Alot of what your asking is covered clearly in that book, in fact I think it's covered completely in a single chapter. Tony. On 10/25/07, Thippeswamy, Aravind <AravindT@xxxxxxx> wrote: > So does that mean that "tasklets", "work-queues" fall under this > category and are triggered by "software Interrupt"? > > Regards,, > Aravind. > > "Dovie'andi se tovya sagain" > -Mat Cauthon (WoT). > > -----Original Message----- > From: Tony Mouawad [mailto:tonym.ace@xxxxxxxxx] > Sent: Thursday, October 25, 2007 6:19 PM > To: Thippeswamy, Aravind > Cc: kernelnewbies@xxxxxxxxxxxx > Subject: Re: What is a "Software Interrupt"? > > "Software Interrupts" within the context of tasklets can also be > called "Deferrable Functions". > > Generally how it works is that a device such as your ethernet card > will trigger a "hardware interrupt" saying that there is data > received. You will want to service hardware interrupts as quickly as > possible so what you end up doing when you are handling your hardware > interrupt is "schedule" a software interrupt or more appropriately > schedule a function (defer a function) to handle this receive request > at a moment outside of hardware interrupt handling. > > I think that would be the concept behind software interrupts around > tasklets. Does that help? > > Tony. > > On 10/25/07, Thippeswamy, Aravind <AravindT@xxxxxxx> wrote: > > > > Hi, > > What is a "Software Interrupt"? I was going thru the LDD 3 and > > stumbled upon this. There is an > > instance while explaining spin_lock_bh() function that the author > > mentions that this only disables the "Software Interrupts"( LDD 3,page > > number 119). In the immediately next paragraph, these "Software > > Interrupts" are linked to "tasklets". I am not able to fully > understand > > this point. It would be really nice if some one elaborated on this. > > > > > > > > > > > > > > > > > > Regards,, > > > > Aravind. > > > > > > > > "Dovie'andi se tovya sagain" > > > > -Mat Cauthon (WoT). > > > > > -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
