On 05/11/2018 11:55, Ming Lei wrote: > On Mon, Nov 05, 2018 at 11:23:01AM +0100, Johannes Thumshirn wrote: >> With drivers like iSer we are seeing a lot of bio splitting and smaller I/Os >> being submitted to the driver. >> >> The root cause of this issue that the virtual boundary mask code does not take >> into consideration that some of the memory segments in the SG list may have >> come from a huge memory page that is being managed in the SG list as 4K > > I guess you mean something like 64K PAGE_SIZE, instead of huge page. No I mean like a 2M page from an upper layer. -- Johannes Thumshirn SUSE Labs jthumshirn@xxxxxxx +49 911 74053 689 SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: Felix Imendörffer, Jane Smithard, Graham Norton HRB 21284 (AG Nürnberg) Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
