On 3/27/06, Deepak Joshi <deepak_cins@xxxxxxxxxxx> wrote: > Hi all, > > I read following statement in "Understanding Linux > kernel" > > "the process on behalf of which an interrupt handler > is executed must always stay in the TASK_RUNNING > state, or a system freeze could occur." > > I am not able to understand it clearly. so can anybody > plz explain it to me. Deepak, this line does not literally mean what it says. actaully Interrupts are never executed in process context. They are independent of any process, so whatever process they interrupted should not be put to sleep by the interrupt handler, that is why we should not do anything in interrupt handler which can put the flow of execution to sleep reschedules the CPU to something else. This is what he wanted to mean by these statements. Hope it helped. Gaurav > > Thanks in advance, > Deepak Joshi. > > > > > ___________________________________________________________ > Yahoo! Photos – NEW, now offering a quality print service from just 8p a photo http://uk.photos.yahoo.com > > -- > Kernelnewbies: Help each other learn about the Linux kernel. > Archive: http://mail.nl.linux.org/kernelnewbies/ > FAQ: http://kernelnewbies.org/faq/ > > -- -- -Gaurav Email: gauravd.chd@xxxxxxxxx --------------------------------- Read my blog at: http://lkdp.blogspot.com/ --------------------------------- -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
