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From: Bob Pearson <rpearsonhpe@gmail.com>
To: Bart Van Assche <bvanassche@acm.org>,
	"Pearson, Robert B" <robert.pearson2@hpe.com>,
	"jgg@nvidia.com" <jgg@nvidia.com>,
	"zyjzyj2000@gmail.com" <zyjzyj2000@gmail.com>,
	"linux-rdma@vger.kernel.org" <linux-rdma@vger.kernel.org>,
	"mie@igel.co.jp" <mie@igel.co.jp>
Subject: Re: [PATCH for-rc v3 0/6] RDMA/rxe: Various bug fixes.
Date: Sun, 12 Sep 2021 09:42:32 -0500	[thread overview]
Message-ID: <a048c223-a649-749a-2309-866d10c3e645@gmail.com> (raw)
In-Reply-To: <918787c7-de06-ef67-80ac-ae2e7643dd61@acm.org>

On 9/10/21 5:07 PM, Bart Van Assche wrote:
> On 9/10/21 2:47 PM, Bob Pearson wrote:
>> OK I checked out the kernel with the SHA number above and applied the patch series
>> and rebuilt and reinstalled the kernel. I checked out v36.0 of rdma-core and rebuilt
>> that. rdma is version 5.9.0 but I doubt that will have any effect. My startup script
>> is
>>
>>      export LD_LIBRARY_PATH=/home/bob/src/rdma-core/build/lib/:/usr/local/lib:/usr/lib
>>
>>
>>
>>      sudo ip link set dev enp0s3 mtu 8500
>>
>>      sudo ip addr add dev enp0s3 fe80::0a00:27ff:fe94:8a69/64
>>
>>      sudo rdma link add rxe0 type rxe netdev enp0s3
>>
>>
>> I am running on a Virtualbox VM instance of Ubuntu 21.04 with 20 cores and 8GB of RAM.
>>
>> The test looks like
>>
>>      sudo ./check -q srp/001
>>
>>      srp/001 (Create and remove LUNs)                             [passed]
>>
>>          runtime  1.174s  ...  1.236s
>>
>> There were no issues.
>>
>> Any guesses what else to look at?
> 
> The test I ran is different. I did not run any of the ip link / ip addr /
> rdma link commands since the blktests scripts already run the rdma link
> command. The bug I reported in my previous email is reproducible and
> triggers a VM halt.
> 
> Are we using the same kernel config? I attached my kernel config to my
> previous email. The source code location of the crash address is as
> follows:
> 
> (gdb) list *(rxe_completer+0x96d)
> 0x228d is in rxe_completer (drivers/infiniband/sw/rxe/rxe_comp.c:149).
> 144              */
> 145             wqe = queue_head(qp->sq.queue, QUEUE_TYPE_FROM_CLIENT);
> 146             *wqe_p = wqe;
> 147
> 148             /* no WQE or requester has not started it yet */
> 149             if (!wqe || wqe->state == wqe_state_posted)
> 150                     return pkt ? COMPST_DONE : COMPST_EXIT;
> 151
> 152             /* WQE does not require an ack */
> 153             if (wqe->state == wqe_state_done)
> 
> The disassembly output is as follows:
> 
> drivers/infiniband/sw/rxe/rxe_comp.c:
> 149             if (!wqe || wqe->state == wqe_state_posted)
>    0x0000000000002277 <+2391>:  test   %r12,%r12
>    0x000000000000227a <+2394>:  je     0x2379 <rxe_completer+2649>
>    0x0000000000002280 <+2400>:  lea    0x94(%r12),%rdi
>    0x0000000000002288 <+2408>:  call   0x228d <rxe_completer+2413>
>    0x000000000000228d <+2413>:  mov    0x94(%r12),%eax
>    0x0000000000002295 <+2421>:  test   %eax,%eax
>    0x0000000000002297 <+2423>:  je     0x237c <rxe_completer+2652>
> 
> So the instruction that triggers the crash is "mov 0x94(%r12),%eax".
> Does consumer_addr() perhaps return an invalid address under certain
> circumstances?
> 
> Thanks,
> 
> Bart.

By the way I did rebuild the kernel with your config file. No change. - Bob

      parent reply	other threads:[~2021-09-12 14:42 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-09 20:44 Bob Pearson
2021-09-09 20:44 ` [PATCH for-rc v3 1/6] RDMA/rxe: Add memory barriers to kernel queues Bob Pearson
2021-09-10  1:19   ` Zhu Yanjun
2021-09-10  4:01     ` Bob Pearson
2021-09-14  6:04   ` 回复: " yangx.jy
2021-09-14 15:47     ` Bob Pearson
2021-09-09 20:44 ` [PATCH for-rc v3 2/6] RDMA/rxe: Fix memory allocation while locked Bob Pearson
2021-09-09 20:44 ` [PATCH for-rc v3 3/6] RDMA/rxe: Cleanup MR status and type enums Bob Pearson
2021-09-09 20:44 ` [PATCH for-rc v3 4/6] RDMA/rxe: Separate HW and SW l/rkeys Bob Pearson
2021-09-09 20:44 ` [PATCH for-rc v3 5/6] RDMA/rxe: Create duplicate mapping tables for FMRs Bob Pearson
2021-09-09 20:44 ` [PATCH for-rc v3 6/6] RDMA/rxe: Only allow invalidate for appropriate MRs Bob Pearson
2021-09-09 21:52 ` [PATCH for-rc v3 0/6] RDMA/rxe: Various bug fixes Bart Van Assche
2021-09-10 19:38   ` Pearson, Robert B
2021-09-10 20:23     ` Bart Van Assche
2021-09-10 21:16       ` Bob Pearson
2021-09-10 21:47       ` Bob Pearson
2021-09-10 21:50         ` Bob Pearson
2021-09-10 22:07         ` Bart Van Assche
2021-09-12 14:41           ` Bob Pearson
2021-09-14  3:26             ` Bart Van Assche
2021-09-14  4:18               ` Bob Pearson
2021-09-12 14:42           ` Bob Pearson [this message]

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