Re: [RFC Qemu PATCH v2 2/2] spapr: nvdimm: Implement async flush hcalls

2020-12-21 Thread Greg Kurz
On Mon, 30 Nov 2020 09:17:24 -0600 Shivaprasad G Bhat wrote: > When the persistent memory beacked by a file, a cpu cache flush instruction > is not sufficient to ensure the stores are correctly flushed to the media. > > The patch implements the async hcalls for flush operation on demand from

[RFC Qemu PATCH v2 2/2] spapr: nvdimm: Implement async flush hcalls

2020-11-30 Thread Shivaprasad G Bhat
When the persistent memory beacked by a file, a cpu cache flush instruction is not sufficient to ensure the stores are correctly flushed to the media. The patch implements the async hcalls for flush operation on demand from the guest kernel. The device option sync-dax is by default off and