Hello, I made the patch set based on v1.5.1-beta to calculate the size of cyclic buffer automatically. In v1.5.0, users have to specify the buffer size depending on system memory size with --cyclic-buffer option in order to get decent performance. This patch set avoids the inconvenience above by choosing the lesser value of the two below as the size of cyclic buffer automatically: a. the size enough for storing the 1st/2nd bitmap for the whole of vmcore b. 80% of free memory (as safety limit) Additionally, this patch set remove --cyclic-buffer option because I think it has been already unnecessary. If there is no comments, I'll merge this patch set into v1.5.1-rc. Thanks Atsushi Kumagai
