Messages in this thread | | | Date | Thu, 15 Jul 2010 19:51:32 +0800 | From | Xiaotian Feng <> | Subject | Re: [PATCH -mmotm 12/30] selinux: tag avc cache alloc as non-critical |
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On 07/13/2010 06:55 PM, Mitchell Erblich wrote: > > On Jul 13, 2010, at 3:19 AM, Xiaotian Feng wrote: > >> From 6c3a91091b2910c23908a9f9953efcf3df14e522 Mon Sep 17 00:00:00 2001 >> From: Xiaotian Feng<dfeng@redhat.com> >> Date: Tue, 13 Jul 2010 11:02:41 +0800 >> Subject: [PATCH 12/30] selinux: tag avc cache alloc as non-critical >> >> Failing to allocate a cache entry will only harm performance not correctness. >> Do not consume valuable reserve pages for something like that. >> >> Signed-off-by: Peter Zijlstra<a.p.zijlstra@chello.nl> >> Signed-off-by: Suresh Jayaraman<sjayaraman@suse.de> >> Signed-off-by: Xiaotian Feng<dfeng@redhat.com> >> --- >> security/selinux/avc.c | 2 +- >> 1 files changed, 1 insertions(+), 1 deletions(-) >> >> diff --git a/security/selinux/avc.c b/security/selinux/avc.c >> index 3662b0f..9029395 100644 >> --- a/security/selinux/avc.c >> +++ b/security/selinux/avc.c >> @@ -284,7 +284,7 @@ static struct avc_node *avc_alloc_node(void) >> { >> struct avc_node *node; >> >> - node = kmem_cache_zalloc(avc_node_cachep, GFP_ATOMIC); >> + node = kmem_cache_zalloc(avc_node_cachep, GFP_ATOMIC|__GFP_NOMEMALLOC); >> if (!node) >> goto out; >> >> -- >> 1.7.1.1 >> > > Why not just replace GFP_ATOMIC with GFP_NOWAIT? > > This would NOT consume the valuable last pages.
But replace GFP_ATOMIC with GFP_NOWAIT can not prevent avc_alloc_node consume reserved pages.
> > Mitchell Erblich >> -- >> To unsubscribe from this list: send the line "unsubscribe netdev" in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html > >
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