~hackernews | Bookmarks (2)

RCU is a specialized synchronization mechanism, and is typically used where there are far more readers (rcu_read_lock(), rcu_read_unlock(), rcu_dereference(), and so on) than there are updaters (synchronize_rcu(), call_rcu(), rcu_assign_pointer(), and so on). But does the Linux kernel really make heavier use of RCU'...

When you have an outage caused by a performance issue, you don't want to lose precious time just to install the tools needed to diagnose it. Here is a list of "crisis tools" I recommend installing on your Linux servers by default (if they aren't already), along with the (Ubuntu) package names that they come from: Pa...