Re: question on dup_task_struct

[Andrew Morton <akpm@zip.com.au>]

Oliver Neukum wrote:
> 
> Hi,
> 
> why is GFP_ATOMIC used in fork.c::dup_task_struct?

Presumably so that the allocation of the task structure can
dip into the emergency pools, giving fork a better chance
of succeeding?

We don't need to do that now - we can run page reclaim in
there as well as dip into the emergency pools.

 fork.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

--- 2.5.30/kernel/fork.c~fork-alloc	Sat Aug  3 15:19:10 2002
+++ 2.5.30-akpm/kernel/fork.c	Sat Aug  3 15:19:54 2002
@@ -106,9 +106,10 @@ static struct task_struct *dup_task_stru
 	struct thread_info *ti;
 
 	ti = alloc_thread_info();
-	if (!ti) return NULL;
+	if (!ti)
+		return NULL;
 
-	tsk = kmem_cache_alloc(task_struct_cachep,GFP_ATOMIC);
+	tsk = kmem_cache_alloc(task_struct_cachep, GFP_KERNEL|__GFP_HIGH);
 	if (!tsk) {
 		free_thread_info(ti);
 		return NULL;

.