Hi zhenwei, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on akpm-mm/mm-everything] [also build test WARNING on next-20220519] [cannot apply to linux/master linus/master v5.18-rc7] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/intel-lab-lkp/linux/commits/zhenwei-pi/recover-hardware-corrupted-page-by-virtio-balloon/20220520-151328 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything config: hexagon-randconfig-r041-20220519 (https://download.01.org/0day-ci/archive/20220520/202205202014.mgqgBrKd-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project e00cbbec06c08dc616a0d52a20f678b8fbd4e304) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/intel-lab-lkp/linux/commit/a42127073dd4adb6354649c8235c5cde033d01f2 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review zhenwei-pi/recover-hardware-corrupted-page-by-virtio-balloon/20220520-151328 git checkout a42127073dd4adb6354649c8235c5cde033d01f2 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/virtio/ If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/virtio/virtio_balloon.c:654:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough] default: ^ drivers/virtio/virtio_balloon.c:654:2: note: insert 'break;' to avoid fall-through default: ^ break; 1 warning generated. vim +654 drivers/virtio/virtio_balloon.c 593 594 static void recover_vq_handle_response(struct virtio_balloon *vb, unsigned int len) 595 { 596 struct __virtio_balloon_recover *in_vbr; 597 struct virtio_balloon_recover *vbr; 598 struct page *page; 599 unsigned int pfns; 600 u32 pfn0, pfn1; 601 __u8 status; 602 603 /* the response is not expected */ 604 if (unlikely(len != sizeof(struct __virtio_balloon_recover))) 605 return; 606 607 in_vbr = &vb->in_vbr; 608 vbr = &in_vbr->vbr; 609 if (unlikely(vbr->cmd != VIRTIO_BALLOON_R_CMD_RESPONSE)) 610 return; 611 612 /* to make sure the contiguous balloon PFNs */ 613 for (pfns = 1; pfns < VIRTIO_BALLOON_PAGES_PER_PAGE; pfns++) { 614 pfn0 = virtio32_to_cpu(vb->vdev, in_vbr->pfns[pfns - 1]); 615 pfn1 = virtio32_to_cpu(vb->vdev, in_vbr->pfns[pfns]); 616 if (pfn1 - pfn0 != 1) 617 return; 618 } 619 620 pfn0 = virtio32_to_cpu(vb->vdev, in_vbr->pfns[0]); 621 if (!pfn_valid(pfn0)) 622 return; 623 624 pfn1 = -1; 625 spin_lock(&vb->recover_page_list_lock); 626 list_for_each_entry(page, &vb->corrupted_page_list, lru) { 627 pfn1 = page_to_pfn(page); 628 if (pfn1 == pfn0) 629 break; 630 } 631 spin_unlock(&vb->recover_page_list_lock); 632 633 status = vbr->status; 634 switch (status) { 635 case VIRTIO_BALLOON_R_STATUS_RECOVERED: 636 if (pfn1 == pfn0) { 637 spin_lock(&vb->recover_page_list_lock); 638 list_del(&page->lru); 639 balloon_page_push(&vb->recovered_page_list, page); 640 spin_unlock(&vb->recover_page_list_lock); 641 queue_work(system_freezable_wq, &vb->unpoison_memory_work); 642 dev_info_ratelimited(&vb->vdev->dev, "recovered pfn 0x%x", pfn0); 643 } 644 break; 645 case VIRTIO_BALLOON_R_STATUS_FAILED: 646 /* the hypervisor can't fix this corrupted page, balloon puts page */ 647 if (pfn1 == pfn0) { 648 spin_lock(&vb->recover_page_list_lock); 649 list_del(&page->lru); 650 spin_unlock(&vb->recover_page_list_lock); 651 put_page(page); 652 dev_info_ratelimited(&vb->vdev->dev, "failed to recover pfn 0x%x", pfn0); 653 } > 654 default: 655 break; 656 }; 657 658 /* continue to get response from host side if the response gets handled successfully */ 659 recover_vq_get_response(vb); 660 } 661 -- 0-DAY CI Kernel Test Service https://01.org/lkp
