diff options
| author | John Gregor <john.gregor@qlogic.com> | 2008-04-16 21:09:24 -0700 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2008-04-16 21:09:24 -0700 |
| commit | 58411d1c012dca53ec9107bd98acb63f648e2435 (patch) | |
| tree | d48edc5c3c64d91311bb4134b83bfe7b62b10ec4 /drivers/infiniband/hw/ipath/ipath_init_chip.c | |
| parent | 6be979d71a5e8720c8560cc58713407947e5f691 (diff) | |
IB/ipath: Head of Line blocking vs forward progress of user apps
There's a conflict between our need to quiesce PSM-based applications
to avoid HoL blocking when the IB link goes down and the apps' desire
to remain running so that their quiescence timout mechanism can keep
running.
The compromise is to STOP the processes for a fixed period of time and
then alternate between CONT and STOP until the link is again active.
If there are poor interactions with subnet manager configuration at a
given site, the interval can be adjusted via a module paramter.
Signed-off-by: John Gregor <john.gregor@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/hw/ipath/ipath_init_chip.c')
| -rw-r--r-- | drivers/infiniband/hw/ipath/ipath_init_chip.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/ipath/ipath_init_chip.c b/drivers/infiniband/hw/ipath/ipath_init_chip.c index f0d7848d9bb1..bed0927916cc 100644 --- a/drivers/infiniband/hw/ipath/ipath_init_chip.c +++ b/drivers/infiniband/hw/ipath/ipath_init_chip.c @@ -908,6 +908,12 @@ int ipath_init_chip(struct ipath_devdata *dd, int reinit) dd->ipath_stats_timer_active = 1; } + /* Set up HoL state */ + init_timer(&dd->ipath_hol_timer); + dd->ipath_hol_timer.function = ipath_hol_event; + dd->ipath_hol_timer.data = (unsigned long)dd; + dd->ipath_hol_state = IPATH_HOL_UP; + done: if (!ret) { *dd->ipath_statusp |= IPATH_STATUS_CHIP_PRESENT; |