Hi, Threads are executed in the context of process, which are created in the user space. Other threads are created by the kernel drivers too. Those I believe falls in init process, even though they are created after kernel get booted and when drivers are get loaded. (I am not sure about the parent of these kernel_thread) Now one process can have more than one thread. So we should be able to set the priority for all the threads present in one process. So I expect an API which takes thread pid_t as an argument and not task_t. Any idea whether task_t type of instance is created for the kernel_thread also or that is for the process? Regards, Parav Pandit --- Manjunath_Naik <Manjunath_Naik@xxxxxxxxxx> wrote: > > Hi Pavan, > > I think in Linux the kernel thread will be getting > executed in the > context of the current process. I don't think these > threads have its own > task struct. > > Thanks > Manjunath Naik > > > -----Original Message----- > From: Parav Pandit [mailto:paravpandit@xxxxxxxxx] > Sent: Monday, June 05, 2006 2:57 PM > To: Manjunath_Naik; kernelnewbies@xxxxxxxxxxxx > Subject: RE: changing kernel thread priority created > using > kernel_thread()? > > Hi Manjunath, > > As per my understanding, nice command and > set_user_nice() are for process and not for the > threads inside the process and kernel level threads. > > process are created using fork() and has huge > task_struct. > While kernel_threads are created using, > kernel_thread. > > I couldn't figure out which structure is for kernel > threads, as architecture specific assembly code in > arch_kernel_thread() function has in it. > > Regards, > Parav Pandit > > > --- Manjunath_Naik <Manjunath_Naik@xxxxxxxxxx> > wrote: > > > > > I think the priority of the kernel thread can be > > changed using > > "set_user_nice" function. I had found this in > > following mailing list. > > > > > http://www.ussg.iu.edu/hypermail/linux/kernel/0510.2/1027.html > > > > > > set_user_nice(current, -19); > > > > Older kernels required: > > > > task_lock(current); > > current->nice = -19; > > task_unlock(current); > > > > The kernel thread can set this up when it is first > > started. > > > > > > Thanks > > Manjunath Naik > > > > -----Original Message----- > > From: kernelnewbies-bounce@xxxxxxxxxxxx > > [mailto:kernelnewbies-bounce@xxxxxxxxxxxx] On > Behalf > > Of Parav Pandit > > Sent: Monday, June 05, 2006 1:53 AM > > To: kernelnewbies@xxxxxxxxxxxx > > Subject: changing kernel thread priority created > > using kernel_thread()? > > > > Hi, > > > > 1. How to change the priority of the kernel > threads > > created using kernel_thread() API? > > > > 2. What is the default priority of the threads > > created > > using kernel_thread() API? > > > > 3. In latest 2.4 kernel and 2.6 kernel, > > do we have one-to-one mapping for user space > process > > and POSIX threads to kernel_thread or we have > M-to-N > > mapping? > > > > Regards, > > Parav Pandit > > > > > > __________________________________________________ > > Do You Yahoo!? > > Tired of spam? Yahoo! Mail has the best spam > > protection around > > http://mail.yahoo.com > > > > -- > > Kernelnewbies: Help each other learn about the > Linux > > kernel. > > Archive: > > http://mail.nl.linux.org/kernelnewbies/ > > FAQ: http://kernelnewbies.org/faq/ > > > > > > > > > > DISCLAIMER: > > This email (including any attachments) is intended > > for the sole use of the intended recipient/s and > may > > contain material that is CONFIDENTIAL AND PRIVATE > > COMPANY INFORMATION. Any review or reliance by > > others or copying or distribution or forwarding of > > any or all of the contents in this message is > > STRICTLY PROHIBITED. If you are not the intended > > recipient, please contact the sender by email and > > delete all copies; your cooperation in this regard > > is appreciated. > > > > > __________________________________________________ > Do You Yahoo!? > Tired of spam? Yahoo! Mail has the best spam > protection around > http://mail.yahoo.com > > > > DISCLAIMER: > This email (including any attachments) is intended > for the sole use of the intended recipient/s and may > contain material that is CONFIDENTIAL AND PRIVATE > COMPANY INFORMATION. Any review or reliance by > others or copying or distribution or forwarding of > any or all of the contents in this message is > STRICTLY PROHIBITED. If you are not the intended > recipient, please contact the sender by email and > delete all copies; your cooperation in this regard > is appreciated. > __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
