On Thu, 13 May 2010 14:01:37 -0400 Josef Bacik <josef@xxxxxxxxxx> wrote: > On Thu, May 13, 2010 at 11:26:39AM -0400, Christoph Hellwig wrote: > > On Thu, May 13, 2010 at 11:31:45AM -0400, Josef Bacik wrote: > > > AIO's aio_complete does kmap with KM_IRQ0/1 and it gets called in the same > > > context as the btrfs completion handler, so if it's ok for aio_complete it > > > should be ok for btrfs right? Thanks, > > > > aio_complete does a spin_lock_irqsave before that, which disables > > interrupts on the local CPU. > > > > Ok how about I just do > > local_irq_disable() > kmap(KM_IRQ0) > local_irq_enable() > > would that be acceptable? Thanks, yup. local_irq_disable() (or local_irq_save()) kmap_atomic(KM_IRQx); <stuff> kunmap_atomic(KM_IRQx); local_irq_enable() (or local_irq_restore()). then perhaps flush_dcache_page(). -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
