Hi Ryo,
2008/7/4 Ryo Tsuruta <ryov@xxxxxxxxxxxxx>:
> +static void prevent_burst_bios(struct ioband_group *gp, struct bio *bio)
> +{
> + struct ioband_device *dp = gp->c_banddev;
> +
> + if (current->flags & PF_KTHREAD) {
> + /*
> + * Kernel threads shouldn't be blocked easily since each of
> + * them may handle BIOs for several groups on several
> + * partitions.
> + */
Might be a stupid question, but doesn't that make more sense to just
check if current->mm == NULL ?
I think PF_BORROWED_MM is only used when kernel threads doing AIO
for user process, and that should be counted as normal user processes.
Am I miss anything ?
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