kernel/linux.git/arch/um/drivers/ubd.h, branch linux-4.16.y

um: UBD Improvements

2016-12-14T21:46:55+00:00

UBD at present is extremely slow because it handles only one request at a time in the IO thread and IRQ handler. The single request at a time is replaced by handling multiple requests as well as necessary workarounds for short reads/writes. Resulting performance improvement in disk IO - 30% Signed-off-by: Anton Ivanov Signed-off-by: Richard Weinberger

um: Cleanup SIGTERM handling

2013-09-07T08:56:58+00:00

Richard reported that some UML processes survive if the UML main process receives a SIGTERM. This issue was caused by a wrongly placed signal(SIGTERM, SIG_DFL) in init_new_thread_signals(). It disabled the UML exit handler accidently for some processes. The correct solution is to disable the fatal handler for all UML helper threads/processes. Such that last_ditch_exit() does not get called multiple times and all processes can exit due to SIGTERM. Reported-and-tested-by: Richard W.M. Jones Signed-off-by: Richard Weinberger

um: clean up the includes in ubd

2012-03-24T23:29:52+00:00

Signed-off-by: Al Viro Signed-off-by: Richard Weinberger