On Wed, Apr 17, 2019 at 02:23:50PM +0200, Michal Koutný wrote: > Hi. > > I see this discussion somewhat faded away since the previous year. > > There was rework [1] that reduced (ab)use of mmap_sem in prctl > functions. > > Actually, there still remains the down_write() in prctl_set_mm. > I considered at least replacing it with the mm_struct.arg_lock + > down_read() but then I learnt about this thread intending to remove that > part completely. I wouldn't oppose if CRIU is the sole (aware) user. > > Ad the bot build issue, I could build the kernel both with > CONFIG_CHECKPOINT_RESTORE and without CONFIG_CHECKPOINT_RESTORE just > fine after applying the two proposed patches. > > What is the current state? Perhaps, this change should be CCed to > [email protected](?). > > [1] > https://lore.kernel.org/lkml/[email protected]/T/
Hi! I've a bit vague memory what we've ended up with, but iirc there was a problem with brk() syscall or similar. Then I think we left everything as is. I think there is no much activity in this prctl area now as far as i know (replying to what is current state).
