Hi Christoph, On Fri, Aug 30, 2019 at 09:35:34AM -0700, Christoph Hellwig wrote: > On Thu, Aug 15, 2019 at 12:41:51PM +0800, Gao Xiang wrote: > > +static bool use_vmap; > > +module_param(use_vmap, bool, 0444); > > +MODULE_PARM_DESC(use_vmap, "Use vmap() instead of vm_map_ram() (default 0)"); > > And how would anyone know which to pick? It has significant FIO benchmark difference on sequential read least on arm64... I have no idea whether all platform vm_map_ram() behaves better than vmap(), so I leave an option for users here... Thanks, Gao Xiang _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
