* [PATCH 2.6.36] RDMA/cxgb3: Don't exceed the max HW CQ depth.
@ 2010-08-28 13:35 Steve Wise
[not found] ` <20100828133505.14439.81049.stgit-T4OLL4TyM9aNDNWfRnPdfg@public.gmane.org>
0 siblings, 1 reply; 5+ messages in thread
From: Steve Wise @ 2010-08-28 13:35 UTC (permalink / raw)
To: linux-rdma-u79uwXL29TY76Z2rM5mHXA
The max depth supported by T3 is 64K entries.
This bug will cause stalls and possibly crashes in large MPI clusters.
Signed-off-by: Steve Wise <swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
---
drivers/infiniband/hw/cxgb3/cxio_hal.h | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/drivers/infiniband/hw/cxgb3/cxio_hal.h b/drivers/infiniband/hw/cxgb3/cxio_hal.h
index 8f0caf7..78fbe9f 100644
--- a/drivers/infiniband/hw/cxgb3/cxio_hal.h
+++ b/drivers/infiniband/hw/cxgb3/cxio_hal.h
@@ -53,7 +53,7 @@
#define T3_MAX_PBL_SIZE 256
#define T3_MAX_RQ_SIZE 1024
#define T3_MAX_QP_DEPTH (T3_MAX_RQ_SIZE-1)
-#define T3_MAX_CQ_DEPTH 262144
+#define T3_MAX_CQ_DEPTH 65536
#define T3_MAX_NUM_STAG (1<<15)
#define T3_MAX_MR_SIZE 0x100000000ULL
#define T3_PAGESIZE_MASK 0xffff000 /* 4KB-128MB */
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^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH 2.6.36] RDMA/cxgb3: Don't exceed the max HW CQ depth.
[not found] ` <20100828133505.14439.81049.stgit-T4OLL4TyM9aNDNWfRnPdfg@public.gmane.org>
@ 2010-08-28 13:40 ` Steve Wise
[not found] ` <4C7911B4.9070904-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
2010-09-02 21:52 ` Roland Dreier
1 sibling, 1 reply; 5+ messages in thread
From: Steve Wise @ 2010-08-28 13:40 UTC (permalink / raw)
To: linux-rdma-u79uwXL29TY76Z2rM5mHXA
On 8/28/2010 8:35 AM, Steve Wise wrote:
> The max depth supported by T3 is 64K entries.
>
> This bug will cause stalls and possibly crashes in large MPI clusters.
>
> Signed-off-by: Steve Wise<swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
> ---
I would also like to get this into 2.6.35 stable. What's the process
for that?
Steve.
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* Re: [PATCH 2.6.36] RDMA/cxgb3: Don't exceed the max HW CQ depth.
[not found] ` <4C7911B4.9070904-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
@ 2010-08-29 7:16 ` Bart Van Assche
[not found] ` <AANLkTim96=HGH_WBaPAUV2zMG0HDgFmixtHE2xQaJMyS-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
0 siblings, 1 reply; 5+ messages in thread
From: Bart Van Assche @ 2010-08-29 7:16 UTC (permalink / raw)
To: Steve Wise; +Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA
On Sat, Aug 28, 2010 at 3:40 PM, Steve Wise <swise-7bPotxP6k4+P2YhJcF5u+v7I7tHvgBF7@public.gmane.orgm> wrote:
>
> On 8/28/2010 8:35 AM, Steve Wise wrote:
>>
>> The max depth supported by T3 is 64K entries.
>>
>> This bug will cause stalls and possibly crashes in large MPI clusters.
>>
>> Signed-off-by: Steve Wise<swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
>> ---
>
> I would also like to get this into 2.6.35 stable. What's the process for that?
The easiest way is to add "CC: <stable-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>" when submitting a
patch. An alternative is after the patch has been accepted in Linus'
tree to submit it to stable-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org with a reference to the commit
ID in Linus' tree. More information can be found in
Documentation/stable_kernel_rules.txt.
Bart.
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH 2.6.36] RDMA/cxgb3: Don't exceed the max HW CQ depth.
[not found] ` <AANLkTim96=HGH_WBaPAUV2zMG0HDgFmixtHE2xQaJMyS-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
@ 2010-08-29 18:33 ` Roland Dreier
0 siblings, 0 replies; 5+ messages in thread
From: Roland Dreier @ 2010-08-29 18:33 UTC (permalink / raw)
To: Bart Van Assche; +Cc: Steve Wise, linux-rdma-u79uwXL29TY76Z2rM5mHXA
> The easiest way is to add "CC: <stable-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>" when submitting a
> patch. An alternative is after the patch has been accepted in Linus'
> tree to submit it to stable-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org with a reference to the commit
> ID in Linus' tree. More information can be found in
> Documentation/stable_kernel_rules.txt.
Yep, this is exactly right. In this case I'll add the cc to the commit
message so you don't need to do anything more.
- R.
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH 2.6.36] RDMA/cxgb3: Don't exceed the max HW CQ depth.
[not found] ` <20100828133505.14439.81049.stgit-T4OLL4TyM9aNDNWfRnPdfg@public.gmane.org>
2010-08-28 13:40 ` Steve Wise
@ 2010-09-02 21:52 ` Roland Dreier
1 sibling, 0 replies; 5+ messages in thread
From: Roland Dreier @ 2010-09-02 21:52 UTC (permalink / raw)
To: Steve Wise; +Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA
thanks, applied with cc to stable added.
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2010-08-28 13:35 [PATCH 2.6.36] RDMA/cxgb3: Don't exceed the max HW CQ depth Steve Wise
[not found] ` <20100828133505.14439.81049.stgit-T4OLL4TyM9aNDNWfRnPdfg@public.gmane.org>
2010-08-28 13:40 ` Steve Wise
[not found] ` <4C7911B4.9070904-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
2010-08-29 7:16 ` Bart Van Assche
[not found] ` <AANLkTim96=HGH_WBaPAUV2zMG0HDgFmixtHE2xQaJMyS-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2010-08-29 18:33 ` Roland Dreier
2010-09-02 21:52 ` Roland Dreier
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