| Message ID | 20220609134011.725343-1-kda@semihalf.com (mailing list archive) |
|---|---|
| State | New |
| Delegated to: | Thomas Monjalon |
| Headers | show |
| Series | [1/1] doc: expand description of no-huge and PMD issue | expand |
| Context | Check | Description |
|---|---|---|
| ci/iol-abi-testing | success | Testing PASS |
| ci/intel-Testing | success | Testing PASS |
| ci/Intel-compilation | success | Compilation OK |
| ci/iol-x86_64-unit-testing | success | Testing PASS |
| ci/iol-x86_64-compile-testing | success | Testing PASS |
| ci/iol-aarch64-compile-testing | success | Testing PASS |
| ci/iol-intel-Functional | success | Functional Testing PASS |
| ci/iol-intel-Performance | success | Performance Testing PASS |
| ci/iol-aarch64-unit-testing | success | Testing PASS |
| ci/iol-mellanox-Performance | success | Performance Testing PASS |
| ci/github-robot: build | success | github build: passed |
| ci/checkpatch | success | coding style OK |
On Thu, Jun 9, 2022 at 3:40 PM Stanislaw Kardach <kda@semihalf.com> wrote: > > Add more details to the description of a known issue of PMDs not being > usable when --no-huge EAL command line parameter is used. The issue > actually happens whenever there is a need for physical addresses, even > when there is no PMD attached. > > Signed-off-by: Stanislaw Kardach <kda@semihalf.com> Anatoly, Dmitry, opinions? Thanks.
13/06/2022 11:31, David Marchand: > On Thu, Jun 9, 2022 at 3:40 PM Stanislaw Kardach <kda@semihalf.com> wrote: > > > > Add more details to the description of a known issue of PMDs not being > > usable when --no-huge EAL command line parameter is used. The issue > > actually happens whenever there is a need for physical addresses, even > > when there is no PMD attached. > > > > Signed-off-by: Stanislaw Kardach <kda@semihalf.com> > > Anatoly, Dmitry, opinions? > Thanks. Why nobody is reviewing doc?
diff --git a/doc/guides/rel_notes/known_issues.rst b/doc/guides/rel_notes/known_issues.rst index 570550843a..2e0ffbdd93 100644 --- a/doc/guides/rel_notes/known_issues.rst +++ b/doc/guides/rel_notes/known_issues.rst @@ -249,11 +249,15 @@ PMD does not work with --no-huge EAL command line parameter ----------------------------------------------------------- **Description**: - Currently, the DPDK does not store any information about memory allocated by ``malloc()` (for example, NUMA node, - physical address), hence PMDs do not work when the ``--no-huge`` command line parameter is supplied to EAL. + Currently, the DPDK does not store any information about memory allocated by ``malloc()`` (for example, NUMA node, + physical address), hence PMDs do not work when the ``--no-huge`` command line parameter is supplied to EAL. This + happens when using non-IOMMU based UIO drivers (i.e. ``igb_uio`` or ``uio_pci_generic``) or when IOVA mode is + explicitly set to use physical addresses (via the ``--iova-mode=pa`` EAL parameter). **Implication**: - Sending and receiving data with PMD will not work. + Sending and receiving data with PMD will not work. Unit tests checking ``--no-huge`` operation will fail if + there is a device bound to the PMD (eal_flags_n_opt_autotest, eal_flags_no_huge_autotest, + eal_flags_vdev_opt_autotest, eal_flags_misc_autotest). **Resolution/Workaround**: Use huge page memory or use VFIO to map devices.
Add more details to the description of a known issue of PMDs not being usable when --no-huge EAL command line parameter is used. The issue actually happens whenever there is a need for physical addresses, even when there is no PMD attached. Signed-off-by: Stanislaw Kardach <kda@semihalf.com> --- doc/guides/rel_notes/known_issues.rst | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-)