Messages in this thread | | | Subject | Re: aio stress panic on 2.6.11-mm1 | From | Arjan van de Ven <> | Date | Wed, 09 Mar 2005 12:07:48 +0100 |
| |
On Wed, 2005-03-09 at 16:34 +0530, Suparna Bhattacharya wrote: > Any sense of how costly it is to use spin_lock_irq's vs spin_lock > (across different architectures)
on x86 it makes a difference of maybe a few cycles. At most. However please consider using spin_lock_irqsave(); the _irq() variant, while it can be used correctly, is a major source of bugs since it unconditionally enables interrupts on unlock.
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |