Re: [Qemu-devel] [RFC PATCH 4/6] ftrace: Allow stealing pages from pipe buffer

2012-07-30 Thread Steven Rostedt
On Tue, 2012-07-24 at 11:37 +0900, Yoshihiro YUNOMAE wrote: > From: Masami Hiramatsu > > Use generic steal operation on pipe buffer to allow stealing > ring buffer's read page from pipe buffer. > > Note that this could reduce the performance of splice on the > splice_write side operation without

[Qemu-devel] [RFC PATCH 4/6] ftrace: Allow stealing pages from pipe buffer

2012-07-23 Thread Yoshihiro YUNOMAE
From: Masami Hiramatsu Use generic steal operation on pipe buffer to allow stealing ring buffer's read page from pipe buffer. Note that this could reduce the performance of splice on the splice_write side operation without affinity setting. Since the ring buffer's read pages are allocated on the