19 Sep
2018
19 Sep
'18
6:07 a.m.
On Tue, Sep 18, 2018 at 07:14:13PM -0400, Steven Rostedt wrote:
Linus (aka Greg),
Vaibhav Nagarnaik found that modifying the ring buffer size could cause a huge latency in the system because it does a while loop to free pages without releasing the CPU (on non preempt kernels). In a case where there are hundreds of thousands of pages to free it could actually cause a system stall. A properly place cond_resched() solves this issue.
Please pull the latest trace-v4.19-rc4 tree, which can be found at:
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git trace-v4.19-rc4
Ick, line wrapping makes it hard to cut/paste :(
Anyway, now pulled and pushed out.
greg k-h