Unfortunately I am no expert on the bootchart collector. But in your dmesg I can see this
[ 2.832955] Out of memory: kill process 110 (collector) score 51 or a child
[ 2.832963] Killed process 110 (collector) vsz:3268kB, anon-rss:512kB, file-rss:404kB
which looks a lot to me like OOM is killing your bootchart collector.
Later in the dmesg plymouthd and ureadahead is also OOM killed. I wonder why?
@Zachary
Unfortunately I am no expert on the bootchart collector. But in your dmesg I can see this
[ 2.832955] Out of memory: kill process 110 (collector) score 51 or a child
[ 2.832963] Killed process 110 (collector) vsz:3268kB, anon-rss:512kB, file-rss:404kB
which looks a lot to me like OOM is killing your bootchart collector.
Later in the dmesg plymouthd and ureadahead is also OOM killed. I wonder why?