_at_Maksim, I first did a "git apply -R bt.diff" and then root_at_freeBSD13:/usr/src # git apply --stat --check --ignore-whitespace ng_btsocket_hci_raw.c.diff.txt error: patch failed: head/sys/netgraph/bluetooth/socket/ng_btsocket_hci_raw.c:1156 error: head/sys/netgraph/bluetooth/socket/ng_btsocket_hci_raw.c: patch does not apply Rebuilding with MTX_SPIN=y (withouth patch)...On Wed, 28 Aug 2019 at 19:10, Maksim Yevmenkin <maksim.yevmenkin_at_gmail.com> wrote: > > > Hmm... interesting.... > > > > > > I only took a brief look at it. I suppose I can ensure user space address is wired and then copyout() can be called with mutex held > > > > >No, you cannot do this, at least without making the kernel to panic. > > User might unmap the wired mapping at any time still. > > Kostik, > > i was thinking along the lines of vslock/vsunlock and copyout_nofault. > basically similar to the sysctl code. do you think this would not > work? actually, i dont think i need to hold lock over copyout. attached is my version of the patch (untested) thanks, maxReceived on Wed Aug 28 2019 - 20:34:26 UTC
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