qedr memory leak report

Chuck Lever
2019-08-30T18:04:28Z

Hi Michal-

In the middle of some other testing, I got this kmemleak report
while testing with FastLinq cards in iWARP mode:

unreferenced object 0xffff888458923340 (size 32):
comm "mount.nfs", pid 2294, jiffies 4298338848 (age 1144.337s)
hex dump (first 32 bytes):
20 1d 69 63 88 88 ff ff 20 1d 69 63 88 88 ff ff .ic.... .ic....
00 60 7a 69 84 88 ff ff 00 60 82 f9 00 00 00 00 .`zi.....`......
backtrace:
[<000000000df5bfed>] __kmalloc+0x128/0x176
[<0000000020724641>] qedr_alloc_pbl_tbl.constprop.44+0x3c/0x121 [qedr]
[<00000000a361c591>] init_mr_info.constprop.41+0xaf/0x21f [qedr]
[<00000000e8049714>] qedr_alloc_mr+0x95/0x2c1 [qedr]
[<000000000e6102bc>] ib_alloc_mr_user+0x31/0x96 [ib_core]
[<00000000d254a9fb>] frwr_init_mr+0x23/0x121 [rpcrdma]
[<00000000a0364e35>] rpcrdma_mrs_create+0x45/0xea [rpcrdma]
[<00000000fd6bf282>] rpcrdma_buffer_create+0x9e/0x1c9 [rpcrdma]
[<00000000be3a1eba>] xprt_setup_rdma+0x109/0x279 [rpcrdma]
[<00000000b736b88f>] xprt_create_transport+0x39/0x19a [sunrpc]
[<000000001024e4dc>] rpc_create+0x118/0x1ab [sunrpc]
[<00000000cca43a49>] nfs_create_rpc_client+0xf8/0x15f [nfs]
[<00000000073c962c>] nfs_init_client+0x1a/0x3b [nfs]
[<00000000b03964c4>] nfs_init_server+0xc1/0x212 [nfs]
[<000000001c71f609>] nfs_create_server+0x74/0x1a4 [nfs]
[<000000004dc919a1>] nfs3_create_server+0xb/0x25 [nfsv3]

It's repeated many times.

The workload was an unremarkable software build and regression test
suite on an NFSv3 mount with RDMA.

--
Chuck Lever