On 03/24/2015 04:15 AM, Jason Zaman wrote: > open_init_pty uses select() to handle all the file descriptors. There is > a very high CPU usage due to select() always returning immediately with > the fd is available for write. This uses a ring buffer and only calls > select on the read/write fds that have data that needs to be > read/written which eliminates the high CPU usage. > > This also correctly returns the exit code from the child process. > > This was originally from debian where they have been carrying it as a > patch for a long time. Then we got a bug report in gentoo which this > also happens to fix. The original debian patch had the ring buffer > written in C++ so I modified the class into a struct and some static > methods so it is C-only at the request of Steve Lawrence. > > Debian bug: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=474956 > Gentoo bug: https://bugs.gentoo.org/show_bug.cgi?id=532616 > > Signed-off-by: Jason Zaman <jason@xxxxxxxxxxxxx> > Tested-by: Laurent Bigonville <bigon@xxxxxxxx> Thanks, applied. _______________________________________________ Selinux mailing list Selinux@xxxxxxxxxxxxx To unsubscribe, send email to Selinux-leave@xxxxxxxxxxxxx. To get help, send an email containing "help" to Selinux-request@xxxxxxxxxxxxx.
