tree c72c0b9ae52c81ccecbd434fb886f8f668245f74
parent 491d4bed8051c655c7664b85446e13901463eb63
author Roland McGrath <roland@redhat.com> 1144734856 -0700
committer Linus Torvalds <torvalds@g5.osdl.org> 1144761522 -0700

[PATCH] process accounting: take original leader's start_time in non-leader exec

The only record we have of the real-time age of a process, regardless of
execs it's done, is start_time.  When a non-leader thread exec, the
original start_time of the process is lost.  Things looking at the
real-time age of the process are fooled, for example the process accounting
record when the process finally dies.  This change makes the oldest
start_time stick around with the process after a non-leader exec.  This way
the association between PID and start_time is kept constant, which seems
correct to me.

Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>