* [ndctl PATCH] ndctl: recover from failed namespace creation
@ 2018-09-11 8:31 oceanhehy
2018-11-28 8:06 ` [External] " Ocean HY1 He
2018-11-28 22:10 ` Dan Williams
0 siblings, 2 replies; 3+ messages in thread
From: oceanhehy @ 2018-09-11 8:31 UTC (permalink / raw)
To: dan.j.williams, vishal.l.verma, qi.fuli, linux-nvdimm; +Cc: Ocean He
From: Ocean He <hehy1@lenovo.com>
When namespace creation failure occurs, the consumed namespace (seed or 0th
idle) and pfn/dax seed would block next namespace creation. A recovery is
needed to handle this type failure.
A symptom example (section size is 128MB) based on kernel 4.19-rc2 and
ndctl v62:
# ndctl create-namespace -r region1 -s 100m -t pmem -m fsdax
{
"dev":"namespace1.0",
"mode":"fsdax",
"map":"dev",
"size":"96.00 MiB (100.66 MB)",
"uuid":"ef9a0556-a610-40b5-8c71-43991765a2cc",
"raw_uuid":"177b22e2-b7e8-482f-a063-2b8de876d979",
"sector_size":512,
"blockdev":"pmem1",
"numa_node":1
}
# ndctl create-namespace -r region1 -s 100m -t pmem -m fsdax
libndctl: ndctl_pfn_enable: pfn1.1: failed to enable
Error: namespace1.1: failed to enable
failed to create namespace: No such device or address
# ndctl destroy-namespace namespace1.0 -f
destroyed 1 namespace
# ndctl create-namespace -r region1 -s 128m -t pmem -m fsdax
failed to create namespace: Device or resource busy
Signed-off-by: Ocean He <hehy1@lenovo.com>
---
Additional information:
A kernel patch to fix this has been reviewed by Dan Williams, and he prefers
to handle it in ndctl directly.
https://www.spinics.net/lists/kernel/msg2901465.html
ndctl/namespace.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/ndctl/namespace.c b/ndctl/namespace.c
index 510553c..76ee2ed 100644
--- a/ndctl/namespace.c
+++ b/ndctl/namespace.c
@@ -393,6 +393,8 @@ static int setup_namespace(struct ndctl_region *region,
try(ndctl_pfn, set_align, pfn, p->align);
try(ndctl_pfn, set_namespace, pfn, ndns);
rc = ndctl_pfn_enable(pfn);
+ if (rc)
+ ndctl_pfn_set_namespace(pfn, NULL);
} else if (p->mode == NDCTL_NS_MODE_DAX) {
struct ndctl_dax *dax = ndctl_region_get_dax_seed(region);
@@ -402,6 +404,8 @@ static int setup_namespace(struct ndctl_region *region,
try(ndctl_dax, set_align, dax, p->align);
try(ndctl_dax, set_namespace, dax, ndns);
rc = ndctl_dax_enable(dax);
+ if (rc)
+ ndctl_dax_set_namespace(dax, NULL);
} else if (p->mode == NDCTL_NS_MODE_SAFE) {
struct ndctl_btt *btt = ndctl_region_get_btt_seed(region);
@@ -783,7 +787,13 @@ static int namespace_create(struct ndctl_region *region)
return -ENODEV;
}
- return setup_namespace(region, ndns, &p);
+ rc = setup_namespace(region, ndns, &p);
+ if (rc) {
+ ndctl_namespace_set_enforce_mode(ndns, NDCTL_NS_MODE_RAW);
+ ndctl_namespace_delete(ndns);
+ }
+
+ return rc;
}
static int zero_info_block(struct ndctl_namespace *ndns)
--
1.8.3.1
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^ permalink raw reply related [flat|nested] 3+ messages in thread
* RE: [External] [ndctl PATCH] ndctl: recover from failed namespace creation
2018-09-11 8:31 [ndctl PATCH] ndctl: recover from failed namespace creation oceanhehy
@ 2018-11-28 8:06 ` Ocean HY1 He
2018-11-28 22:10 ` Dan Williams
1 sibling, 0 replies; 3+ messages in thread
From: Ocean HY1 He @ 2018-11-28 8:06 UTC (permalink / raw)
To: oceanhehy, dan.j.williams, vishal.l.verma, qi.fuli, linux-nvdimm
Hi Dan,
I am trying to track this patch and looking forward to get your comments.
Many thanks!
Ocean.
> -----Original Message-----
> From: oceanhehy@gmail.com <oceanhehy@gmail.com>
> Sent: Tuesday, September 11, 2018 4:31 PM
> To: dan.j.williams@intel.com; vishal.l.verma@intel.com; qi.fuli@jp.fujitsu.com;
> linux-nvdimm@lists.01.org
> Cc: Ocean HY1 He <hehy1@lenovo.com>
> Subject: [External] [ndctl PATCH] ndctl: recover from failed namespace
> creation
>
> From: Ocean He <hehy1@lenovo.com>
>
> When namespace creation failure occurs, the consumed namespace (seed or
> 0th
> idle) and pfn/dax seed would block next namespace creation. A recovery is
> needed to handle this type failure.
>
> A symptom example (section size is 128MB) based on kernel 4.19-rc2 and
> ndctl v62:
> # ndctl create-namespace -r region1 -s 100m -t pmem -m fsdax
> {
> "dev":"namespace1.0",
> "mode":"fsdax",
> "map":"dev",
> "size":"96.00 MiB (100.66 MB)",
> "uuid":"ef9a0556-a610-40b5-8c71-43991765a2cc",
> "raw_uuid":"177b22e2-b7e8-482f-a063-2b8de876d979",
> "sector_size":512,
> "blockdev":"pmem1",
> "numa_node":1
> }
> # ndctl create-namespace -r region1 -s 100m -t pmem -m fsdax
> libndctl: ndctl_pfn_enable: pfn1.1: failed to enable
> Error: namespace1.1: failed to enable
> failed to create namespace: No such device or address
> # ndctl destroy-namespace namespace1.0 -f
> destroyed 1 namespace
> # ndctl create-namespace -r region1 -s 128m -t pmem -m fsdax
> failed to create namespace: Device or resource busy
>
> Signed-off-by: Ocean He <hehy1@lenovo.com>
> ---
> Additional information:
> A kernel patch to fix this has been reviewed by Dan Williams, and he prefers
> to handle it in ndctl directly.
> https://www.spinics.net/lists/kernel/msg2901465.html
>
> ndctl/namespace.c | 12 +++++++++++-
> 1 file changed, 11 insertions(+), 1 deletion(-)
>
> diff --git a/ndctl/namespace.c b/ndctl/namespace.c
> index 510553c..76ee2ed 100644
> --- a/ndctl/namespace.c
> +++ b/ndctl/namespace.c
> @@ -393,6 +393,8 @@ static int setup_namespace(struct ndctl_region
> *region,
> try(ndctl_pfn, set_align, pfn, p->align);
> try(ndctl_pfn, set_namespace, pfn, ndns);
> rc = ndctl_pfn_enable(pfn);
> + if (rc)
> + ndctl_pfn_set_namespace(pfn, NULL);
> } else if (p->mode == NDCTL_NS_MODE_DAX) {
> struct ndctl_dax *dax = ndctl_region_get_dax_seed(region);
>
> @@ -402,6 +404,8 @@ static int setup_namespace(struct ndctl_region
> *region,
> try(ndctl_dax, set_align, dax, p->align);
> try(ndctl_dax, set_namespace, dax, ndns);
> rc = ndctl_dax_enable(dax);
> + if (rc)
> + ndctl_dax_set_namespace(dax, NULL);
> } else if (p->mode == NDCTL_NS_MODE_SAFE) {
> struct ndctl_btt *btt = ndctl_region_get_btt_seed(region);
>
> @@ -783,7 +787,13 @@ static int namespace_create(struct ndctl_region
> *region)
> return -ENODEV;
> }
>
> - return setup_namespace(region, ndns, &p);
> + rc = setup_namespace(region, ndns, &p);
> + if (rc) {
> + ndctl_namespace_set_enforce_mode(ndns,
> NDCTL_NS_MODE_RAW);
> + ndctl_namespace_delete(ndns);
> + }
> +
> + return rc;
> }
>
> static int zero_info_block(struct ndctl_namespace *ndns)
> --
> 1.8.3.1
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Linux-nvdimm@lists.01.org
https://lists.01.org/mailman/listinfo/linux-nvdimm
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [ndctl PATCH] ndctl: recover from failed namespace creation
2018-09-11 8:31 [ndctl PATCH] ndctl: recover from failed namespace creation oceanhehy
2018-11-28 8:06 ` [External] " Ocean HY1 He
@ 2018-11-28 22:10 ` Dan Williams
1 sibling, 0 replies; 3+ messages in thread
From: Dan Williams @ 2018-11-28 22:10 UTC (permalink / raw)
To: Ocean He; +Cc: Ocean HY1 He, linux-nvdimm
On Tue, Sep 11, 2018 at 1:34 AM <oceanhehy@gmail.com> wrote:
>
> From: Ocean He <hehy1@lenovo.com>
>
> When namespace creation failure occurs, the consumed namespace (seed or 0th
> idle) and pfn/dax seed would block next namespace creation. A recovery is
> needed to handle this type failure.
>
> A symptom example (section size is 128MB) based on kernel 4.19-rc2 and
> ndctl v62:
> # ndctl create-namespace -r region1 -s 100m -t pmem -m fsdax
> {
> "dev":"namespace1.0",
> "mode":"fsdax",
> "map":"dev",
> "size":"96.00 MiB (100.66 MB)",
> "uuid":"ef9a0556-a610-40b5-8c71-43991765a2cc",
> "raw_uuid":"177b22e2-b7e8-482f-a063-2b8de876d979",
> "sector_size":512,
> "blockdev":"pmem1",
> "numa_node":1
> }
> # ndctl create-namespace -r region1 -s 100m -t pmem -m fsdax
> libndctl: ndctl_pfn_enable: pfn1.1: failed to enable
> Error: namespace1.1: failed to enable
> failed to create namespace: No such device or address
> # ndctl destroy-namespace namespace1.0 -f
> destroyed 1 namespace
> # ndctl create-namespace -r region1 -s 128m -t pmem -m fsdax
> failed to create namespace: Device or resource busy
>
> Signed-off-by: Ocean He <hehy1@lenovo.com>
Apologies, this got lost in my inbox. Looks good, and tests ok as well.
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
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