Am 24.01.2018 um 12:50 schrieb Michal Hocko: > On Wed 24-01-18 12:23:10, Michel Dänzer wrote: >> On 2018-01-24 12:01 PM, Michal Hocko wrote: >>> On Wed 24-01-18 11:27:15, Michel Dänzer wrote: > [...] >>>> 2. If the OOM killer kills a process which is sharing BOs with another >>>> process, this should result in the other process dropping its references >>>> to the BOs as well, at which point the memory is released. >>> OK. How exactly are those BOs mapped to the userspace? >> I'm not sure what you're asking. Userspace mostly uses a GEM handle to >> refer to a BO. There can also be userspace CPU mappings of the BO's >> memory, but userspace doesn't need CPU mappings for all BOs and only >> creates them as needed. > OK, I guess you have to bear with me some more. This whole stack is a > complete uknonwn. I am mostly after finding a boundary where you can > charge the allocated memory to the process so that the oom killer can > consider it. Is there anything like that? Except for the proposed file > handle hack? Not that I knew of. As I said before we need some kind of callback that a process now starts to use a file descriptor, but without anything from that file descriptor mapped into the address space. Regards, Christian.
