Find first non-matching line in VIM

It happens sometimes that I have to look into various log and trace files on Windows and generally I use for the purpose VIM.

My problem though is that I still can't find any analog of grep -v inside of VIM: find in the buffer a line not matching given regular expression. E.g. log file is filled with lines which somewhere in a middle contain phrase all is ok and I need to find first line which doesn't contain all is ok.

I can write a custom function for that, yet at the moment that seems to be an overkill and likely to be slower than a native solution.

Is there any easy way to do it in VIM?