On 1/27/20 3:18 AM, sjpark@xxxxxxxxxx wrote: > From: SeongJae Park <sjpark@xxxxxxxxx> > > Granting pages consumes backend system memory. In systems configured > with insufficient spare memory for those pages, it can cause a memory > pressure situation. However, finding the optimal amount of the spare > memory is challenging for large systems having dynamic resource > utilization patterns. Also, such a static configuration might lack > flexibility. > > To mitigate such problems, this patchset adds a memory reclaim callback > to 'xenbus_driver' (patch 1) and then introduce a lock for race > condition avoidance (patch 2). After that, patch 3 applies the callback > mechanism to mitigate the problem in 'xen-blkback'. The fourth and > fifth patches are trivial cleanups; those fix nits we found during the > development of this patchset. > > Note that this patch has only trivial changes from v13. Please refer to > below patch history for the changes. > Applied to for-linus-5.6. -boris
