Re: [PATCH net-next 3/3] net/smc: optimize MTTE consumption for SMC-R buffers
From: Christoph Hellwig <hch@infradead.org>
Date: 2026-01-23 14:52:58
Also in:
linux-mm, linux-rdma, linux-s390, lkml
On Fri, Jan 23, 2026 at 04:23:49PM +0800, D. Wythe wrote:
+static inline int smc_buf_get_vm_page_order(struct smc_buf_desc *buf_slot)
+{
+#ifdef CONFIG_HAVE_ARCH_HUGE_VMALLOC
+ struct vm_struct *vm;
+
+ vm = find_vm_area(buf_slot->cpu_addr);
+ return vm ? vm->page_order : 0;
+#else
+ return 0;
+#endifYou might want to encapsulate this logic in a vmalloc_order or similar helper in vmalloc.c.