| Message ID | 1266321682.6776.254.camel@bigi |
|---|---|
| State | Accepted, archived |
| Delegated to: | David Miller |
| Headers | show |
Le mardi 16 février 2010 à 07:01 -0500, jamal a écrit : > Eric's version fixed it for pfkey. This one is for xfrm user. > I thought about amortizing those two get_acqseq()s but it seems > reasonable to have two of these sequence spaces for the two different > interfaces. > Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Thanks ! -- 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
From: jamal <hadi@cyberus.ca> Date: Tue, 16 Feb 2010 07:01:22 -0500 > Eric's version fixed it for pfkey. This one is for xfrm user. > I thought about amortizing those two get_acqseq()s but it seems > reasonable to have two of these sequence spaces for the two different > interfaces. Applied, thanks Jamal. -- 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
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c index f50ee9b..96f2088 100644 --- a/net/xfrm/xfrm_state.c +++ b/net/xfrm/xfrm_state.c @@ -1462,12 +1462,12 @@ EXPORT_SYMBOL(xfrm_find_acq_byseq); u32 xfrm_get_acqseq(void) { u32 res; - static u32 acqseq; - static DEFINE_SPINLOCK(acqseq_lock); + static atomic_t acqseq; + + do { + res = atomic_inc_return(&acqseq); + } while (!res); - spin_lock_bh(&acqseq_lock); - res = (++acqseq ? : ++acqseq); - spin_unlock_bh(&acqseq_lock); return res; } EXPORT_SYMBOL(xfrm_get_acqseq);
Eric's version fixed it for pfkey. This one is for xfrm user. I thought about amortizing those two get_acqseq()s but it seems reasonable to have two of these sequence spaces for the two different interfaces. cheers, jamal commit d5168d5addbc999c94aacda8f28a4a173756a72b Author: Jamal Hadi Salim <hadi@cyberus.ca> Date: Tue Feb 16 06:51:22 2010 -0500 xfrm: avoid spinlock in get_acqseq() used by xfrm user This is in the same spirit as commit 28aecb9d7728dc26bf03ce7925fe622023a83a2a by Eric Dumazet. Use atomic_inc_return() in get_acqseq() to avoid taking a spinlock Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca>