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Subject: Re: [PATCH v23 QEMU 0/5] virtio-balloon: add support for page poison reporting and free page reporting
> Am 08.05.2020 um 19:31 schrieb Alexander Duyck <alexander.duyck@gmail.com>: > > ïI just wanted to follow up since it has been a little over a week > since I submitted this and I haven't heard anything back. It looks > like the linux-headers patches can be dropped since the headers appear > to have been synced. I was wondering if I should resubmit with just > the 3 patches that are adding the functionality, or if this patch-set > is good as-is? Should be good as-is. However, if the new compat machines are already upstream, you might want to tackle that right away. Cheers and have a nice weekend! > > Thanks. > > - Alex > >> On Mon, Apr 27, 2020 at 5:53 PM Alexander Duyck >> <alexander.duyck@gmail.com> wrote: >> >> This series provides an asynchronous means of reporting free guest pages >> to QEMU through virtio-balloon 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. >> >> I originally submitted this patch series back on February 11th 2020[1], >> but at that time I was focused primarily on the kernel portion of this >> patch set. However as of April 7th those patches are now included in >> Linus's kernel tree[2] and so I am submitting the QEMU pieces for >> inclusion. >> >> [1]: https://lore.kernel.org/lkml/20200211224416.29318.44077.stgit@localhost.localdomain/ >> [2]: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b0c504f154718904ae49349147e3b7e6ae91ffdc >> >> Changes from v17: >> Fixed typo in patch 1 title >> Addressed white-space issues reported via checkpatch >> Added braces {} for two if statements to match expected coding style >> >> Changes from v18: >> Updated patches 2 and 3 based on input from dhildenb >> Added comment to patch 2 describing what keeps us from reporting a bad page >> Added patch to address issue with ROM devices being directly writable >> >> Changes from v19: >> Added std-headers change to match changes pushed for linux kernel headers >> Added patch to remove "report" from page hinting code paths >> Updated comment to better explain why we disable hints w/ page poisoning >> Removed code that was modifying config size for poison vs hinting >> Dropped x-page-poison property >> Added code to bounds check the reported region vs the RAM block >> Dropped patch for ROM devices as that was already pulled in by Paolo >> >> Changes from v20: >> Rearranged patches to push Linux header sync patches to front >> Removed association between free page hinting and VIRTIO_BALLOON_F_PAGE_POISON >> Added code to enable VIRTIO_BALLOON_F_PAGE_POISON if page reporting is enabled >> Fixed possible resource leak if poison or qemu_balloon_is_inhibited return true >> >> Changes from v21: >> Added ack for patch 3 >> Rewrote patch description for page poison reporting feature >> Made page-poison independent property and set to enabled by default >> Added logic to migrate poison_val >> Added several comments in code to better explain features >> Switched free-page-reporting property to disabled by default >> >> Changes from v22: >> Added ack for patches 4 & 5 >> Added additional comment fixes in patch 3 to remove "reporting" reference >> Renamed rvq in patch 5 to reporting_vq to improve readability >> Moved call adding reporting_vq to after free_page_vq to fix VQ ordering >> >> --- >> >> Alexander Duyck (5): >> linux-headers: Update to allow renaming of free_page_report_cmd_id >> linux-headers: update to contain virito-balloon free page reporting >> virtio-balloon: Replace free page hinting references to 'report' with 'hint' >> virtio-balloon: Implement support for page poison reporting feature >> virtio-balloon: Provide an interface for free page reporting >> >> >> hw/virtio/virtio-balloon.c | 176 ++++++++++++++++++----- >> include/hw/virtio/virtio-balloon.h | 23 ++- >> include/standard-headers/linux/virtio_balloon.h | 12 +- >> 3 files changed, 159 insertions(+), 52 deletions(-) >> >> -- >
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