- uml-speed-up-exec.patch removed from -mm tree

[akpm@xxxxxxxxxxxxxxxxxxxx]

The patch titled
     uml: speed up exec
has been removed from the -mm tree.  Its filename was
     uml-speed-up-exec.patch

This patch was dropped because it was merged into mainline or a subsystem tree

------------------------------------------------------
Subject: uml: speed up exec
From: Jeff Dike <jdike@xxxxxxxxxxx>

flush_thread doesn't need to do a full page table walk in order to clear the
address space.  It knows what the end result needs to be, so it can call unmap
directly.

This results in a 10-20% speedup in an exec from bash.

Signed-off-by: Jeff Dike <jdike@xxxxxxxxxxxxxxx>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@xxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 arch/um/kernel/skas/exec.c |   12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff -puN arch/um/kernel/skas/exec.c~uml-speed-up-exec arch/um/kernel/skas/exec.c
--- a/arch/um/kernel/skas/exec.c~uml-speed-up-exec
+++ a/arch/um/kernel/skas/exec.c
@@ -17,7 +17,17 @@
 
 void flush_thread_skas(void)
 {
-	force_flush_all();
+	void *data = NULL;
+	unsigned long end = proc_mm ? task_size : CONFIG_STUB_START;
+	int ret;
+
+	ret = unmap(&current->mm->context.skas.id, 0, end, 1, &data);
+	if(ret){
+		printk("flush_thread_skas - clearing address space failed, "
+		       "err = %d\n", ret);
+		force_sig(SIGKILL, current);
+	}
+
 	switch_mm_skas(&current->mm->context.skas.id);
 }
 
_

Patches currently in -mm which might be from jdike@xxxxxxxxxxx are

origin.patch
uml-hostfs-style-fixes.patch
uml-an-idle-system-should-have-zero-load-average.patch
remove-tas.patch
x86-create-asm-cmpxchgh.patch
uml-network-and-pcap-cleanup.patch
uml-pcap-devices-should-get-macs-from-command-line.patch

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