On Wed, Jun 01, 2016 at 02:15:22PM -0700, Mark Fasheh wrote:
> > +/* dynamically allocate and initialize a ref_root */
> > +static struct ref_root *ref_root_alloc(void)
> > +{
> > + struct ref_root *ref_tree;
> > +
> > + ref_tree = kmalloc(sizeof(*ref_tree), GFP_KERNEL);
>
> I'm pretty sure we want GFP_NOFS here.
Then please explain to me why/where the reasoning below is wrong:
> > Because there's no need to narrow the allocation constraints. GFP_NOFS
> > is necessary when the caller is on a critical path that must not recurse
> > back to the filesystem through the allocation (ie. if the allocator
> > decides to free some memory and tries tro write dirty data). FIEMAP is
> > called from an ioctl.
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