On Fri, 2013-03-01 at 17:20 -0800, Linus Torvalds wrote:
> On Fri, Mar 1, 2013 at 4:16 PM, Davidlohr Bueso
> wrote:
> > +static inline struct sem_array *sem_obtain_object(struct ipc_namespace
> > *ns, int id)
> > +{
> > + struct kern_ipc_perm *ipcp = ipc_obtain_object(&sem_ids(ns), id);
>
On Sat, 2013-03-02 at 12:41 +0800, Michel Lespinasse wrote:
> On Sat, Mar 2, 2013 at 8:16 AM, Davidlohr Bueso
> wrote:
> > Instead of holding the ipc lock for permissions and security
> > checks, among others, only acquire it when necessary.
> >
> > Signed-off-by: Davidlohr Bueso
>
> You got so
On Sat, Mar 2, 2013 at 8:16 AM, Davidlohr Bueso wrote:
> Instead of holding the ipc lock for permissions and security
> checks, among others, only acquire it when necessary.
>
> Signed-off-by: Davidlohr Bueso
You got some really great test results on this; I think they deserve
to be mentioned in
On Fri, Mar 1, 2013 at 4:16 PM, Davidlohr Bueso wrote:
> +static inline struct sem_array *sem_obtain_object(struct ipc_namespace *ns,
> int id)
> +{
> + struct kern_ipc_perm *ipcp = ipc_obtain_object(&sem_ids(ns), id);
> +
> + if (IS_ERR(ipcp))
> + return (struct sem_arr
Instead of holding the ipc lock for permissions and security
checks, among others, only acquire it when necessary.
Signed-off-by: Davidlohr Bueso
---
ipc/sem.c | 94 ---
1 file changed, 66 insertions(+), 28 deletions(-)
diff --git a/ip
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