| commit | abd41f037e1a64543000ed73b42f616d04d92700 | [log] [tgz] |
|---|---|---|
| author | Rusty Russell <rusty@rustcorp.com.au> | Fri Jun 12 22:27:02 2009 -0600 |
| committer | Rusty Russell <rusty@rustcorp.com.au> | Fri Jun 12 22:27:02 2009 +0930 |
| tree | d9013e66f4d8fc66fc92ce0587f8d126e156b253 | |
| parent | ebf9a5a99c1a464afe0b4dfa64416fc8b273bc5c [diff] |
lguest: fix race in halt code When the Guest does the LHCALL_HALT hypercall, we go to sleep, expecting that a timer or the Waker will wake_up_process() us. But we do it in a stupid way, leaving a classic missing wakeup race. So split maybe_do_interrupt() into interrupt_pending() and try_deliver_interrupt(), and check maybe_do_interrupt() and the "break_out" flag before calling schedule. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>