Hello Vivek, On Thu, 20 Sep 2012 09:12:41 -0400 Vivek Goyal <vgoyal at redhat.com> wrote: > > Now, I think makedumpfile should automatically choose the lesser of the two below > > as the size of cyclic buffer when the size isn't specified: > > > > a. the size enough for storing the 1st/2nd bitmap for the whole of vmcore > > b. the limit size (e.g. 70-80% of free memory) > > > > However, I don't have a good idea how to determine the appropriate size > > for the case of "b". > > If someone have a idea for the limit size, please let me know. > > May be just look at "free" output or "cat /proc/meminfo" and grep for > "MemFree" calculate the size of buffer. Thank you for your answer, but what I minded was to allocate most of free memory is safe or not. But now, I think it may be safe because processes which need some memory will not be created while makedumpfile is running. So, I will try to implement the above idea for v1.5.1. When I make the patch, I will post them. Thanks Atsushi Kumagai
