[ofa-general] Re: [PATCHv2] IB/mad: fix duplicated kernel thread name

[Or Gerlitz]

Michael S. Tsirkin wrote:
> Make mad module use a single workqueue rather than a per-port
> workqueue. This way, we'll have less clutter on systems with
> a lot of ports.
> Signed-off-by: Michael S. Tsirkin <mst at dev.mellanox.co.il>
> Thinking about it, why would we *want* a per-port thread?
> What do you guys think about the following?
> As a bonus, this makes it easier to renice the mad thread
> for people that want to do this.

Indeed, today the mad module creates thread per device port, and the cm 
module creates thread per cpu, so if the system has 16 cores and two 
hcas each with two ports, the IB stack would create 20 threads just for 
the sake of the mad and cm modules... I also think it would be good if 
the mad module would create one thread and the cm module as well.

Sean - does it make sense to you to change the CM for that matter?

I brought below listing of the kernel threads on an rh4 u3 / ofed 1.2 
system.

Or.

> root         1     0  0 Jul15 ?        00:00:00 init [5]                             
> root         2     1  0 Jul15 ?        00:00:00 [migration/0]
> root         3     1  0 Jul15 ?        00:00:00 [ksoftirqd/0]
> root         4     1  0 Jul15 ?        00:00:00 [migration/1]
> root         5     1  0 Jul15 ?        00:00:00 [ksoftirqd/1]
> root         6     1  0 Jul15 ?        00:00:00 [migration/2]
> root         7     1  0 Jul15 ?        00:00:00 [ksoftirqd/2]
> root         8     1  0 Jul15 ?        00:00:00 [migration/3]
> root         9     1  0 Jul15 ?        00:00:00 [ksoftirqd/3]
> root        10     1  0 Jul15 ?        00:00:00 [events/0]
> root        11     1  0 Jul15 ?        00:00:00 [events/1]
> root        12     1  0 Jul15 ?        00:00:00 [events/2]
> root        13     1  0 Jul15 ?        00:00:00 [events/3]
> root        14    10  0 Jul15 ?        00:00:00 [khelper]
> root        15    10  0 Jul15 ?        00:00:00 [kacpid]
> root        60    10  0 Jul15 ?        00:00:00 [kblockd/0]
> root        61    10  0 Jul15 ?        00:00:00 [kblockd/1]
> root        62    10  0 Jul15 ?        00:00:00 [kblockd/2]
> root        63    10  0 Jul15 ?        00:00:00 [kblockd/3]
> root        64     1  0 Jul15 ?        00:00:00 [khubd]
> root        73    10  0 Jul15 ?        00:00:00 [pdflush]
> root        74    10  0 Jul15 ?        00:00:00 [pdflush]
> root        76    10  0 Jul15 ?        00:00:00 [aio/0]
> root        77    10  0 Jul15 ?        00:00:00 [aio/1]
> root        78    10  0 Jul15 ?        00:00:00 [aio/2]
> root        79    10  0 Jul15 ?        00:00:00 [aio/3]
> root        75     1  0 Jul15 ?        00:00:00 [kswapd0]
> root       152     1  0 Jul15 ?        00:00:00 [kseriod]
> root       230    12  0 Jul15 ?        00:00:00 [ata/0]
> root       231    12  0 Jul15 ?        00:00:00 [ata/1]
> root       232    12  0 Jul15 ?        00:00:00 [ata/2]
> root       233    12  0 Jul15 ?        00:00:00 [ata/3]
> root       239     1  0 Jul15 ?        00:00:00 [scsi_eh_0]
> root       267     1  0 Jul15 ?        00:00:01 [kjournald]
> root      1372    10  0 Jul15 ?        00:00:00 [ib_mcast]
> root      1377    10  0 Jul15 ?        00:00:00 [ib_cm/0]
> root      1378    10  0 Jul15 ?        00:00:00 [ib_cm/1]
> root      1379    10  0 Jul15 ?        00:00:00 [ib_cm/2]
> root      1380    10  0 Jul15 ?        00:00:00 [ib_cm/3]
> root      1401    13  0 Jul15 ?        00:00:00 [ipoib]
> root      1418    12  0 Jul15 ?        00:00:00 [mthcacatas]
> root      1421    13  0 Jul15 ?        00:00:00 [ib_mad1]
> root      1422    10  0 Jul15 ?        00:00:00 [ib_mad2]
> root      2132    10  0 Jul15 ?        00:00:00 [kauditd]
> root      2209    10  0 Jul15 ?        00:00:00 [kmpathd/0]
> root      2210    10  0 Jul15 ?        00:00:00 [kmpathd/1]
> root      2211    10  0 Jul15 ?        00:00:00 [kmpathd/2]
> root      2212    10  0 Jul15 ?        00:00:00 [kmpathd/3]
> root      2220    10  0 Jul15 ?        00:00:00 [kmirrord]
> root      2221    10  0 Jul15 ?        00:00:00 [kmir_mon]
> root      3330    11  0 Jul15 ?        00:00:00 [local_sa]
> root      3335    13  0 Jul15 ?        00:00:00 [ib_addr_wq]
> root      3340    11  0 Jul15 ?        00:00:00 [iw_cm_wq]
> root      3345    12  0 Jul15 ?        00:00:00 [rdma_cm_wq]
> root      3350    13  0 Jul15 ?        00:00:00 [sdp]
> root      3358    12  0 Jul15 ?        00:00:00 [krdsd]