tree d283304f635cc5c36d8fa3319dd663209138988e
parent 1b528181b2ffa14721fb28ad1bd539fe1732c583
author Roland McGrath <roland@redhat.com> 1283913388 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1284131426 -0700

execve: improve interactivity with large arguments

This adds a preemption point during the copying of the argument and
environment strings for execve, in copy_strings().  There is already
a preemption point in the count() loop, so this doesn't add any new
points in the abstract sense.

When the total argument+environment strings are very large, the time
spent copying them can be much more than a normal user time slice.
So this change improves the interactivity of the rest of the system
when one process is doing an execve with very large arguments.

Signed-off-by: Roland McGrath <roland@redhat.com>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>