I'm running connectathon tests:
http://www.connectathon.org/nfstests.html
on an nfs mount. The client and server are both running the latest
kernel from git (2.6.26-rc1-00110-ga153063). The exported filesystem is
ext3 on an aoe device, and the aoe target is vblade-15.
On the "write/read 30 MB file", all the nfsd threads get stuck in
uninterruptible wait:
[<c058bbd1>] mutex_lock_nested+0xc1/0x250
[<c014ace3>] ? generic_file_aio_write+0x53/0xe0
[<c014ace3>] generic_file_aio_write+0x53/0xe0
[<c01eda3c>] ext3_file_write+0x1c/0xa0
[<c016a02b>] do_sync_readv_writev+0xab/0xf0
[<c0165ab2>] ? check_poison_obj+0x22/0x1b0
[<c01671d0>] ? __kmalloc+0x100/0x140
[<c012ee10>] ? autoremove_wake_function+0x0/0x40
[<c0338c6b>] ? copy_from_user+0x3b/0x60
[<c0169ea7>] ? rw_copy_check_uvector+0x67/0x110
[<c0315b4f>] ? security_file_permission+0xf/0x20
[<c016a6b7>] do_readv_writev+0x87/0x1b0
[<c01eda20>] ? ext3_file_write+0x0/0xa0
...
I don't see the same problem if I export an ext3 partition not on aoe.
I also don't see the problem if I skip nfs and run the connectathon
tests directly on the exported filesystem on the server.
Both server and client are kvm guests, with vblade running on the kvm
host.
--b.
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