Am 18.05.2018 um 16:44 schrieb Michel Dänzer:
On 2018-05-18 11:42 AM, Christian König wrote:
Anyway, the kernel can't rely on userspace using O_CLOEXEC. If the flush
callback being called from multiple processes is an issue, maybe the
flush callback isn't appropriate after all.
Userspace could also grab a reference just by opening /proc/$pid/fd/*.
The idea is just that when any process which used the fd is killed by a
signal we drop the remaining jobs from being submitted to the hardware.
This must only affect jobs submitted by the killed process, not those
submitted by other processes.
Yeah, that's exactly the plan here.
For additional security we could safe the pid of the job submitter, but
since this should basically not happen in normal operation I would
rather like to avoid that.
Christian.
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