Hello, guys. On Thu, Jun 14, 2012 at 11:07:53AM +0900, Minchan Kim wrote: > It shouldn't work because vmap_page_range still can allocate > GFP_KERNEL by pud_alloc in vmap_pud_range. For it, I tried [1] but > other mm guys want to add WARNING [2] so let's avoiding gfp context > passing. > > [1] https://lkml.org/lkml/2012/4/23/77 > [2] https://lkml.org/lkml/2012/5/2/340 Yeah, vmalloc area doesn't support !GFP_KERNEL allocations and as Minchan said, changing this would require updating page table allocation functions on all archs. This is the same reason why percpu allocator doesn't support !GFP_KERNEL allocations which in turn made blk-throttle implement its own private percpu pool. If xfs can't live without GFP_NOFS vmalloc allocations, either it has to implement its own pool or maybe it's time to implement !GFP_KERNEL allocs for vmalloc area. I don't know. Thanks. -- tejun -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>