Messages in this thread | | | Date | Wed, 17 Apr 2019 14:23:50 +0200 | From | Michal Koutný <> | Subject | Re: [PATCH] prctl: Don't compile some of prctl functions when CRUI |
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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 linux-api@vger.kernel.org(?).
Thanks, Michal
[1] https://lore.kernel.org/lkml/1523730291-109696-1-git-send-email-yang.shi@linux.alibaba.com/T/
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