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nvmf: add one more iov entry for unaligned first page

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For NVMe PRP list command, if the first PRP entry wasn't page
aligned, the number of IOV should add one more entry.

For VFIOUSER transport, a 128KiB PRP command may use 33 entries,
so we add one more entry here to address this case.

Change-Id: I9e30b301ef3ab62d7667adf336f38be9df699929
Signed-off-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/7263
Community-CI: Broadcom CI
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: <dongx.yi@intel.com>
This commit is contained in:
Changpeng Liu 2021-04-07 21:46:36 +08:00 committed by Tomasz Zawadzki
parent 45aaf0db1d
commit bc279db48a
1 changed files with 1 additions and 1 deletions
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2
include/spdk/nvmf_transport.h
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@ -48,7 +48,7 @@
#define SPDK_NVMF_MAX_SGL_ENTRIES 16
/* The maximum number of buffers per request */
#define NVMF_REQ_MAX_BUFFERS (SPDK_NVMF_MAX_SGL_ENTRIES * 2)
#define NVMF_REQ_MAX_BUFFERS (SPDK_NVMF_MAX_SGL_ENTRIES * 2 + 1)
/* AIO backend requires block size aligned data buffers,
* extra 4KiB aligned data buffer should work for most devices.