On Fri, Dec 18, 2015 at 9:28 PM, Vegard Nossum <vegard.nos...@oracle.com> wrote: > I was seeing some really weird behaviour where piping UML's output > somewhere would cause output to get duplicated: > > $ ./vmlinux | head -n 40 > Checking that ptrace can change system call numbers...Core dump limits : > soft - 0 > hard - NONE > OK > Checking syscall emulation patch for ptrace...Core dump limits : > soft - 0 > hard - NONE > OK > Checking advanced syscall emulation patch for ptrace...Core dump limits : > soft - 0 > hard - NONE > OK > Core dump limits : > soft - 0 > hard - NONE > > This is because these tests do a fork() which duplicates the non-empty > stdout buffer, then glibc flushes the duplicated buffer as each child > exits. > > A simple workaround is to flush before forking. > > Signed-off-by: Vegard Nossum <vegard.nos...@oracle.com>
Applied and queued for stable! -- Thanks, //richard ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=267308311&iu=/4140 _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
