On Thu, 2019-12-05 at 08:22 -0800, Alexander Duyck wrote: > This series provides an asynchronous means of reporting free guest pages > to a hypervisor so that the memory associated with those pages can be > dropped and reused by other processes and/or guests on the host. Using > this it is possible to avoid unnecessary I/O to disk and greatly improve > performance in the case of memory overcommit on the host. <snip> > Changes from v14: > https://lore.kernel.org/lkml/20191119214454.24996.66289.stgit@localhost.localdomain/ > Renamed "unused page reporting" to "free page reporting" > Updated code, kconfig, and patch descriptions > Split out patch for __free_isolated_page > Renamed function to __putback_isolated_page > Rewrote core reporting functionality > Added logic to reschedule worker in 2 seconds instead of run to completion > Removed reported_pages statistics > Removed REPORTING_REQUESTED bit used in zone flags > Replaced page_reporting_dev_info refcount with state variable > Removed scatterlist from page_reporting_dev_info > Removed capacity from page reporting device > Added dynamic scatterlist allocation/free at start/end of reporting process > Updated __free_one_page so that reported pages are not always added to tail > Added logic to handle error from report function > Updated virtio-balloon patch that adds support for page reporting > Updated patch description to try and highlight differences in approaches > Updated logic to reflect that we cannot limit the scatterlist from device > Added logic to return error from report function > Moved documentation patch to end of patch set It has been about a week since I posted v15 and haven't heard anything. Consider this a gentle ping. I'm looking for input on patches 3 and 4 in this set as I updated them to address most of the concerns Mel had. Just wondering if the set needs additional work or if we are good with this as a starting point for this feature? Thanks. - Alex
