Hi,

 

 

I’m trying the lvol function.

When I used Malloc as the base bdev, it works fine.

 

However, if I used Nvme as the base bdev, the command hangs up.

# ./scripts/rpc.py construct_lvol_store Nvme0n1 lvs_1 -c 65536

(hangs up)

 

I tried to enable verbose by adding “-t all” with nvmf_tgt.

Then there is a looping message as below when hang-up:

request.c: 237:spdk_bs_sequence_write_zeroes: *INFO*: writing zeroes to 3125627568 blocks at LBA 0

nvme_pcie.c:1521:nvme_pcie_prp_list_append: *INFO*: prp_index:0 virt_addr:0x7f6744ced000 len:4096

nvme_pcie.c:1548:nvme_pcie_prp_list_append: *INFO*: prp1 = 0xbc54ed000

bdev_nvme.c: 184:bdev_nvme_writev: *INFO*: write 2048 blocks with offset 0

nvme_pcie.c:1521:nvme_pcie_prp_list_append: *INFO*: prp_index:0 virt_addr:0x7f6744d00000 len:131072

nvme_pcie.c:1548:nvme_pcie_prp_list_append: *INFO*: prp1 = 0xbc5500000

nvme_pcie.c:1557:nvme_pcie_prp_list_append: *INFO*: prp[0] = 0xbc5501000

nvme_pcie.c:1557:nvme_pcie_prp_list_append: *INFO*: prp[1] = 0xbc5502000

nvme_pcie.c:1557:nvme_pcie_prp_list_append: *INFO*: prp[2] = 0xbc5503000

nvme_pcie.c:1557:nvme_pcie_prp_list_append: *INFO*: prp[3] = 0xbc5504000

nvme_pcie.c:1557:nvme_pcie_prp_list_append: *INFO*: prp[4] = 0xbc5505000

nvme_pcie.c:1557:nvme_pcie_prp_list_append: *INFO*: prp[5] = 0xbc5506000

nvme_pcie.c:1557:nvme_pcie_prp_list_append: *INFO*: prp[6] = 0xbc5507000

nvme_pcie.c:1557:nvme_pcie_prp_list_append: *INFO*: prp[7] = 0xbc5508000

nvme_pcie.c:1557:nvme_pcie_prp_list_append: *INFO*: prp[8] = 0xbc5509000

nvme_pcie.c:1557:nvme_pcie_prp_list_append: *INFO*: prp[9] = 0xbc550a000

nvme_pcie.c:1557:nvme_pcie_prp_list_append: *INFO*: prp[10] = 0xbc550b000

nvme_pcie.c:1557:nvme_pcie_prp_list_append: *INFO*: prp[11] = 0xbc550c000

nvme_pcie.c:1557:nvme_pcie_prp_list_append: *INFO*: prp[12] = 0xbc550d000

nvme_pcie.c:1557:nvme_pcie_prp_list_append: *INFO*: prp[13] = 0xbc550e000

nvme_pcie.c:1557:nvme_pcie_prp_list_append: *INFO*: prp[14] = 0xbc550f000

nvme_pcie.c:1557:nvme_pcie_prp_list_append: *INFO*: prp[15] = 0xbc5510000

          …..

 

Any suggestion what the problem might be?

 

 

 

 

A further question:

It looks that lvol is used to divide a bdev to many bdev with variable size.

But can it be possible to combine many bdev to one?

 If No. Is there any future plan to achieve that?

 

 

Best Regards,

Terry