Question about process freezing

Hi,

I have a simple/dumb question about process freezing.

Instead of freezing every single user land processes by sending them a fake signal and waiting for them to go to the refrigerator, why not freezing the scheduler ?

Quoted 3 lines · Franck Bui-Huu

Instead of freezing every single user land processes by sending them a fake signal and waiting for them to go to the refrigerator, why not freezing the scheduler ?

Because processes can't simply be frozen immediately. They need to have a chance to release any important locks or mutexes they may be holding.

Quoted 5 lines · Alan Stern

Quoted 3 lines · Franck Bui-Huu

Instead of freezing every single user land processes by sending them a fake signal and waiting for them to go to the refrigerator, why not freezing the scheduler ?

Quoted 4 lines

Because processes can't simply be frozen immediately. They need to have a chance to release any important locks or mutexes they may be holding.

You mean any locks held by a frozen process and needed by the suspend code path ?