[2.6 PATCH] SLAB : removes local_irq_save()/local_irq_restore() pair in ksize()

2005-08-20 Thread Eric Dumazet 

This patch removes unnecessary critical section in ksize() function, as cli/sti 
are rather expensive on modern CPUS.


Signed-off-by: Eric Dumazet <[EMAIL PROTECTED]>

diff -Nru linux-2.6.13-rc6-ed/mm/slab.c linux-2.6.13-rc6/mm/slab.c
--- linux-2.6.13-rc6-ed/mm/slab.c   2005-08-20 09:22:29.0 +0200
+++ linux-2.6.13-rc6/mm/slab.c  2005-08-20 09:39:42.0 +0200
@@ -3080,10 +3080,8 @@
unsigned int size = 0;
 
if (likely(objp != NULL)) {
-   local_irq_save(flags);
c = GET_PAGE_CACHE(virt_to_page(objp));
size = kmem_cache_size(c);
-   local_irq_restore(flags);
}
 
return size;

[2.6 PATCH] SLAB : removes local_irq_save()/local_irq_restore() pair in ksize()

2005-08-20 Thread Eric Dumazet 

This patch removes unnecessary critical section in ksize() function, as cli/sti 
are rather expensive on modern CPUS.


Signed-off-by: Eric Dumazet [EMAIL PROTECTED]

diff -Nru linux-2.6.13-rc6-ed/mm/slab.c linux-2.6.13-rc6/mm/slab.c
--- linux-2.6.13-rc6-ed/mm/slab.c   2005-08-20 09:22:29.0 +0200
+++ linux-2.6.13-rc6/mm/slab.c  2005-08-20 09:39:42.0 +0200
@@ -3080,10 +3080,8 @@
unsigned int size = 0;
 
if (likely(objp != NULL)) {
-   local_irq_save(flags);
c = GET_PAGE_CACHE(virt_to_page(objp));
size = kmem_cache_size(c);
-   local_irq_restore(flags);
}
 
return size;