In the case of NVMe, it has an integrity payload consisting of one segment. So, rather than configuring SG_LIST, it was changed by direct DMA mapping. The page-merge is not performed for the struct bio_vec when creating a integrity payload in block. As a result, when creating an integrity paylaod beyond one page, each struct bio_vec is generated, and its bv_len does not exceed the PAGESIZE. To solve it, bio_integrity_add_page() should just add to the existing bvec, similar to bio_add_page() and friends. As the bip configuration changed, the code related to sg_list was also modified. (ref: https://lore.kernel.org/linux-nvme/yq18rewbmay.fsf@xxxxxxxxxxxxxxxxxxxx/T/#t) Tested like this: - Format (support pi) $ sudo nvme format /dev/nvme2n1 --force -n 1 -i 1 -p 0 -m 0 -l 1 -r - Run FIO [global] ioengine=libaio group_reporting [job] bs=512k iodepth=256 rw=write numjobs=8 direct=1 runtime=10s filename=/dev/nvme2n1 - Result ... [ 93.496218] nvme2n1: I/O Cmd(0x1) @ LBA 62464, 1024 blocks, I/O Error (sct 0x2 / sc 0x82) MORE [ 93.496227] protection error, dev nvme2n1, sector 62464 op 0x1:(WRITE) flags 0x18800 phys_seg 3 prio class 2 [ 93.538788] nvme2n1: I/O Cmd(0x1) @ LBA 6144, 1024 blocks, I/O Error (sct 0x2 / sc 0x82) MORE [ 93.538798] protection error, dev nvme2n1, sector 6144 op 0x1:(WRITE) flags 0x18800 phys_seg 3 prio class 2 [ 93.566231] nvme2n1: I/O Cmd(0x1) @ LBA 124928, 1024 blocks, I/O Error (sct 0x0 / sc 0x4) [ 93.566241] I/O error, dev nvme2n1, sector 124928 op 0x1:(WRITE) flags 0x18800 phys_seg 3 prio class 2 [ 93.694147] nvme2n1: I/O Cmd(0x1) @ LBA 64512, 1024 blocks, I/O Error (sct 0x2 / sc 0x82) MORE [ 93.694155] protection error, dev nvme2n1, sector 64512 op 0x1:(WRITE) flags 0x18800 phys_seg 3 prio class 2 [ 93.694299] nvme2n1: I/O Cmd(0x1) @ LBA 5120, 1024 blocks, I/O Error (sct 0x2 / sc 0x82) MORE [ 93.694305] protection error, dev nvme2n1, sector 5120 op 0x1:(WRITE) flags 0x18800 phys_seg 3 prio class 2 ... Jinyoung Choi (2): block: make bvec_try_merge_hw_page() non-static bio-integrity: create multi-page bvecs in bio_integrity_add_page() block/bio-integrity.c | 50 ++++++++++++++++++++++++------------------- block/bio.c | 2 +- block/blk.h | 4 ++++ 3 files changed, 33 insertions(+), 23 deletions(-) -- 2.34.1
