* [dpdk-stable] [PATCH v3] mem: Fix anonymous mapping on Power9.
@ 2018-11-16 17:35 David Wilder
2018-11-18 13:41 ` Thomas Monjalon
2019-02-20 16:04 ` Burakov, Anatoly
0 siblings, 2 replies; 6+ messages in thread
From: David Wilder @ 2018-11-16 17:35 UTC (permalink / raw)
To: dev; +Cc: stable, chaozhu, thomas
Removed the use of MAP_HUGETLB for anonymous mapping on ppc64. The
MAP_HUGETLB had previously been added to workaround issues on IBM Power8
systems when mapping /dev/zero (see: commit
284ae3e9ff9a92575c28c858efd2c85c8de6d440). In the current code the
MAP_HUGETLB flag will cause the anonymous mapping to fail on Power9.
Note, Power8 is currently failing to correctly mmap Hugepages, with and
without this change.
Signed-off-by: David Wilder <dwilder@us.ibm.com>
Reviewed-by: Pradeep Satyanarayana <pradeep@us.ibm.com>
---
V2- Updated release notes.
V3- fixed spelling.
MAINTAINERS | 2 +-
doc/guides/linux_gsg/sys_reqs.rst | 6 ------
doc/guides/rel_notes/release_18_11.rst | 1 +
lib/librte_eal/linuxapp/eal/eal_memalloc.c | 3 ---
lib/librte_eal/linuxapp/eal/eal_memory.c | 4 ----
5 files changed, 2 insertions(+), 14 deletions(-)
diff --git a/MAINTAINERS b/MAINTAINERS
index 19353ac89..c4d2fd086 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -233,7 +233,7 @@ F: drivers/net/ixgbe/ixgbe_rxtx_vec_neon.c
F: drivers/net/i40e/i40e_rxtx_vec_neon.c
F: drivers/net/virtio/virtio_rxtx_simple_neon.c
-IBM POWER
+IBM POWER (alpha)
M: Chao Zhu <chaozhu@linux.vnet.ibm.com>
F: lib/librte_eal/common/arch/ppc_64/
F: lib/librte_eal/common/include/arch/ppc_64/
diff --git a/doc/guides/linux_gsg/sys_reqs.rst b/doc/guides/linux_gsg/sys_reqs.rst
index e2230f37b..c02ec28c1 100644
--- a/doc/guides/linux_gsg/sys_reqs.rst
+++ b/doc/guides/linux_gsg/sys_reqs.rst
@@ -183,12 +183,6 @@ On a NUMA machine, pages should be allocated explicitly on separate nodes::
For 1G pages, it is not possible to reserve the hugepage memory after the system has booted.
- On IBM POWER system, the nr_overcommit_hugepages should be set to the same value as nr_hugepages.
- For example, if the required page number is 128, the following commands are used::
-
- echo 128 > /sys/kernel/mm/hugepages/hugepages-16384kB/nr_hugepages
- echo 128 > /sys/kernel/mm/hugepages/hugepages-16384kB/nr_overcommit_hugepages
-
Using Hugepages with the DPDK
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
diff --git a/doc/guides/rel_notes/release_18_11.rst b/doc/guides/rel_notes/release_18_11.rst
index 51d007582..a271badbe 100644
--- a/doc/guides/rel_notes/release_18_11.rst
+++ b/doc/guides/rel_notes/release_18_11.rst
@@ -532,6 +532,7 @@ Known Issues
driver; the Linux netvsc device must be brought up before the netvsc device is
unbound and passed to the DPDK.
+* IBM Power8 is not supported by this release of DPDK. IBM Power9 is supported.
Tested Platforms
----------------
diff --git a/lib/librte_eal/linuxapp/eal/eal_memalloc.c b/lib/librte_eal/linuxapp/eal/eal_memalloc.c
index 48b9c7360..784939566 100644
--- a/lib/librte_eal/linuxapp/eal/eal_memalloc.c
+++ b/lib/librte_eal/linuxapp/eal/eal_memalloc.c
@@ -753,9 +753,6 @@ alloc_seg(struct rte_memseg *ms, void *addr, int socket_id,
munmap(addr, alloc_sz);
unmapped:
flags = MAP_FIXED;
-#ifdef RTE_ARCH_PPC_64
- flags |= MAP_HUGETLB;
-#endif
new_addr = eal_get_virtual_area(addr, &alloc_sz, alloc_sz, 0, flags);
if (new_addr != addr) {
if (new_addr != NULL)
diff --git a/lib/librte_eal/linuxapp/eal/eal_memory.c b/lib/librte_eal/linuxapp/eal/eal_memory.c
index 48b23ce19..6f94621d4 100644
--- a/lib/librte_eal/linuxapp/eal/eal_memory.c
+++ b/lib/librte_eal/linuxapp/eal/eal_memory.c
@@ -847,10 +847,6 @@ alloc_va_space(struct rte_memseg_list *msl)
void *addr;
int flags = 0;
-#ifdef RTE_ARCH_PPC_64
- flags |= MAP_HUGETLB;
-#endif
-
page_sz = msl->page_sz;
mem_sz = page_sz * msl->memseg_arr.len;
--
2.19.1
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [dpdk-stable] [PATCH v3] mem: Fix anonymous mapping on Power9.
2018-11-16 17:35 [dpdk-stable] [PATCH v3] mem: Fix anonymous mapping on Power9 David Wilder
@ 2018-11-18 13:41 ` Thomas Monjalon
2018-11-27 10:50 ` [dpdk-stable] [dpdk-dev] " Kevin Traynor
2019-02-20 16:04 ` Burakov, Anatoly
1 sibling, 1 reply; 6+ messages in thread
From: Thomas Monjalon @ 2018-11-18 13:41 UTC (permalink / raw)
To: David Wilder; +Cc: stable, dev, chaozhu
16/11/2018 18:35, David Wilder:
> Removed the use of MAP_HUGETLB for anonymous mapping on ppc64. The
> MAP_HUGETLB had previously been added to workaround issues on IBM Power8
> systems when mapping /dev/zero (see: commit
> 284ae3e9ff9a92575c28c858efd2c85c8de6d440). In the current code the
> MAP_HUGETLB flag will cause the anonymous mapping to fail on Power9.
> Note, Power8 is currently failing to correctly mmap Hugepages, with and
> without this change.
>
> Signed-off-by: David Wilder <dwilder@us.ibm.com>
> Reviewed-by: Pradeep Satyanarayana <pradeep@us.ibm.com>
Applied, thanks
Note: Cc stable@dpdk.org does not make sense in this context.
Backporting this patch to 17.11 would be a mistake,
and 17.08 is probably not in Power9 scope.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [dpdk-stable] [dpdk-dev] [PATCH v3] mem: Fix anonymous mapping on Power9.
2018-11-18 13:41 ` Thomas Monjalon
@ 2018-11-27 10:50 ` Kevin Traynor
0 siblings, 0 replies; 6+ messages in thread
From: Kevin Traynor @ 2018-11-27 10:50 UTC (permalink / raw)
To: Thomas Monjalon, David Wilder; +Cc: stable, dev, chaozhu
On 11/18/2018 01:41 PM, Thomas Monjalon wrote:
> 16/11/2018 18:35, David Wilder:
>> Removed the use of MAP_HUGETLB for anonymous mapping on ppc64. The
>> MAP_HUGETLB had previously been added to workaround issues on IBM Power8
>> systems when mapping /dev/zero (see: commit
>> 284ae3e9ff9a92575c28c858efd2c85c8de6d440). In the current code the
>> MAP_HUGETLB flag will cause the anonymous mapping to fail on Power9.
>> Note, Power8 is currently failing to correctly mmap Hugepages, with and
>> without this change.
>>
>> Signed-off-by: David Wilder <dwilder@us.ibm.com>
>> Reviewed-by: Pradeep Satyanarayana <pradeep@us.ibm.com>
>
> Applied, thanks
>
> Note: Cc stable@dpdk.org does not make sense in this context.
> Backporting this patch to 17.11 would be a mistake,
> and 17.08 is probably not in Power9 scope.
>
I think 17.08 is a typo for 18.08? Anyway, I won't backport to 18.08
unless I hear something further.
>
>
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [dpdk-stable] [dpdk-dev] [PATCH v3] mem: Fix anonymous mapping on Power9.
2018-11-16 17:35 [dpdk-stable] [PATCH v3] mem: Fix anonymous mapping on Power9 David Wilder
2018-11-18 13:41 ` Thomas Monjalon
@ 2019-02-20 16:04 ` Burakov, Anatoly
2019-02-20 16:27 ` Thomas Monjalon
1 sibling, 1 reply; 6+ messages in thread
From: Burakov, Anatoly @ 2019-02-20 16:04 UTC (permalink / raw)
To: David Wilder, dev; +Cc: stable, chaozhu, thomas
On 16-Nov-18 5:35 PM, David Wilder wrote:
> Removed the use of MAP_HUGETLB for anonymous mapping on ppc64. The
> MAP_HUGETLB had previously been added to workaround issues on IBM Power8
> systems when mapping /dev/zero (see: commit
> 284ae3e9ff9a92575c28c858efd2c85c8de6d440). In the current code the
> MAP_HUGETLB flag will cause the anonymous mapping to fail on Power9.
> Note, Power8 is currently failing to correctly mmap Hugepages, with and
> without this change.
>
> Signed-off-by: David Wilder <dwilder@us.ibm.com>
> Reviewed-by: Pradeep Satyanarayana <pradeep@us.ibm.com>
> ---
The changes are contained entirely to POWER9 code paths/docs, so while i
cannot verify them working for obvious reasons, i have no objections to
this patch.
Acked-by: Anatoly Burakov <anatoly.burakov@intel.com>
--
Thanks,
Anatoly
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [dpdk-stable] [dpdk-dev] [PATCH v3] mem: Fix anonymous mapping on Power9.
2019-02-20 16:04 ` Burakov, Anatoly
@ 2019-02-20 16:27 ` Thomas Monjalon
2019-02-20 16:44 ` Burakov, Anatoly
0 siblings, 1 reply; 6+ messages in thread
From: Thomas Monjalon @ 2019-02-20 16:27 UTC (permalink / raw)
To: Burakov, Anatoly; +Cc: dev, David Wilder, stable, chaozhu
20/02/2019 17:04, Burakov, Anatoly:
> On 16-Nov-18 5:35 PM, David Wilder wrote:
> > Removed the use of MAP_HUGETLB for anonymous mapping on ppc64. The
> > MAP_HUGETLB had previously been added to workaround issues on IBM Power8
> > systems when mapping /dev/zero (see: commit
> > 284ae3e9ff9a92575c28c858efd2c85c8de6d440). In the current code the
> > MAP_HUGETLB flag will cause the anonymous mapping to fail on Power9.
> > Note, Power8 is currently failing to correctly mmap Hugepages, with and
> > without this change.
> >
> > Signed-off-by: David Wilder <dwilder@us.ibm.com>
> > Reviewed-by: Pradeep Satyanarayana <pradeep@us.ibm.com>
> > ---
>
> The changes are contained entirely to POWER9 code paths/docs, so while i
> cannot verify them working for obvious reasons, i have no objections to
> this patch.
>
> Acked-by: Anatoly Burakov <anatoly.burakov@intel.com>
It was applied a long time ago :)
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [dpdk-stable] [dpdk-dev] [PATCH v3] mem: Fix anonymous mapping on Power9.
2019-02-20 16:27 ` Thomas Monjalon
@ 2019-02-20 16:44 ` Burakov, Anatoly
0 siblings, 0 replies; 6+ messages in thread
From: Burakov, Anatoly @ 2019-02-20 16:44 UTC (permalink / raw)
To: Thomas Monjalon; +Cc: dev, David Wilder, stable, chaozhu
On 20-Feb-19 4:27 PM, Thomas Monjalon wrote:
> 20/02/2019 17:04, Burakov, Anatoly:
>> On 16-Nov-18 5:35 PM, David Wilder wrote:
>>> Removed the use of MAP_HUGETLB for anonymous mapping on ppc64. The
>>> MAP_HUGETLB had previously been added to workaround issues on IBM Power8
>>> systems when mapping /dev/zero (see: commit
>>> 284ae3e9ff9a92575c28c858efd2c85c8de6d440). In the current code the
>>> MAP_HUGETLB flag will cause the anonymous mapping to fail on Power9.
>>> Note, Power8 is currently failing to correctly mmap Hugepages, with and
>>> without this change.
>>>
>>> Signed-off-by: David Wilder <dwilder@us.ibm.com>
>>> Reviewed-by: Pradeep Satyanarayana <pradeep@us.ibm.com>
>>> ---
>>
>> The changes are contained entirely to POWER9 code paths/docs, so while i
>> cannot verify them working for obvious reasons, i have no objections to
>> this patch.
>>
>> Acked-by: Anatoly Burakov <anatoly.burakov@intel.com>
>
> It was applied a long time ago :)
>
I can see that now :) Someone replied to it and it bubbled up my inbox...
--
Thanks,
Anatoly
^ permalink raw reply [flat|nested] 6+ messages in thread
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2018-11-16 17:35 [dpdk-stable] [PATCH v3] mem: Fix anonymous mapping on Power9 David Wilder
2018-11-18 13:41 ` Thomas Monjalon
2018-11-27 10:50 ` [dpdk-stable] [dpdk-dev] " Kevin Traynor
2019-02-20 16:04 ` Burakov, Anatoly
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