Hi. On Thursday 19 July 2007 09:42:02 Agarwal, Lomesh wrote: > My understanding is that Linux kernel sends a signal to freeze processes > during suspend2ram operation. Which signal is used to achieve this? > The problem I am facing is that some of the system calls are failing > with EINTR errno during suspend operation and I want to install a signal > handler for freeze signal with SA_RESTART flag. That should make the > kernel to retry the system calls. Right?
No signal is sent. We tell affected processes that they have a signal pending, and capture them in the signal handling code while the suspend to ram is occuring. After the suspend to ram is finished, we recalculate whether they have a signal pending, and let them continue. Not being a guru on signal handling itself, I won't try to answer the question itself :\. Regards, Nigel
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