On Fri, Mar 2, 2018 at 10:05 AM, Pavel Machek <[email protected]> wrote: > On Fri 2018-03-02 13:01:00, Ganesh Mahendran wrote: >> single_open() interface requires that the whole output must >> fit into a single buffer. This will lead to timeout when >> system memory is not in a good situation. >> >> This patch use seq_open() to show wakeup stats. This method >> need only one page, so timeout will not be observed. > > Can the rcu_read_unlock be delayed arbitrarily by userland code? > > Is that ok with RCU?
No, it isn't. :-)
