The patch titled
cond_resched() added to close_files()
has been removed from the -mm tree. Its filename is
cond_resched-added-to-close_files.patch
This patch was probably dropped from -mm because
it has now been merged into a subsystem tree or
into Linus's tree, or because it was folded into
its parent patch in the -mm tree.
From: Eric Dumazet <dada1@xxxxxxxxxxxxx>
When a process exits, it might spend a lot of time in close_files() closing
thousand of files.
This is bad for latency, and in some cases can trigger 'BUG: soft lockup
detected on CPU#0!'
This patch makes sure a cond_resched() call is done every 32 (or 64) files
closed. This also helps reducing number of files waiting in RCU queues for
final freeing as call_rcu() might have called force_quiescent_state()
Signed-off-by: Eric Dumazet <dada1@xxxxxxxxxxxxx>
Acked-by: Ingo Molnar <mingo@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
kernel/exit.c | 1 +
1 files changed, 1 insertion(+)
diff -puN kernel/exit.c~cond_resched-added-to-close_files kernel/exit.c
--- 25/kernel/exit.c~cond_resched-added-to-close_files Tue May 9 10:42:17 2006
+++ 25-akpm/kernel/exit.c Tue May 9 10:42:17 2006
@@ -453,6 +453,7 @@ static void close_files(struct files_str
i++;
set >>= 1;
}
+ cond_resched();
}
}
_
Patches currently in -mm which might be from dada1@xxxxxxxxxxxxx are
cond_resched-added-to-close_files.patch
-
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