On 07 Jul 2005 12:34:15 +0530, Anurag Verma <averma@xxxxxxxxxxxxxxxxxxx> wrote: > Hi All > Can u please tell me when a process is busy in executing a system call, > and then another process sends a signal then what will happen to the > exectution of system call. Will it be interrupted ? No, Signals are handled while returning from system calls or interrupts handlers. When process P1 is executing the system call code in kernel, and another process sends the signal to it, it kernel will give the controol to signal handler while returning from that system call or the interrupt handler (whatever the next interrupt occurs), whichever occurs first. > If not then once the system call execution is finished then the signal > handler will be invoked? Well it will be invoked before that only, because timer interrupts occur too freq and while returing from its handler, kernel will check the pending signals for currenly running process and invoke the registered signal handlers. -Gaurav > Please clarify me. > Thanks in advance. > bye > Anu > > > > > ******************************************************************************** > Network Programs is a SEI-CMM Level 5 & ISO 9001: 2000 Certified Company > ******************************************************************************** > The information contained in this communication (including any attachments) is > intended solely for the use of the individual or entity to whom it is addressed > and others authorized to receive it. It may contain confidential or legally > privileged information. If you are not the intended recipient you are hereby > notified that any disclosure, copying, distribution or taking any action in > reliance on the contents of this information is strictly prohibited and may be > unlawful. If you have received this communication in error, please notify us > immediately by responding to this email and delete it from your system. > Network Programs (India) Limited is neither liable for the proper and complete > transmission of the information contained in this communication nor for any > delay in its receipt. > ******************************************************************************** > > > -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
