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| author | Ralph Campbell <ralph.campbell@qlogic.com> | 2010-08-02 22:39:24 +0000 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2010-08-03 13:59:25 -0700 |
| commit | 3e3aed0b88f680fed5c604caf7b10d77b2ec45c4 (patch) | |
| tree | 54213dba31eceaeb9990583030fb715d5795f000 /drivers/infiniband/hw/qib/qib_driver.c | |
| parent | 4c6931f5d4f423238ae6e93423081c6ff9753d26 (diff) | |
| download | blackbird-op-linux-3e3aed0b88f680fed5c604caf7b10d77b2ec45c4.tar.gz blackbird-op-linux-3e3aed0b88f680fed5c604caf7b10d77b2ec45c4.zip | |
IB/qib: Limit the number of packets processed per interrupt
Don't processes too many packets without allowing other IRQ functions
a chance to run. Otherwise, there is a chance of getting a "soft
lockup" messages and poor application response times.
Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/hw/qib/qib_driver.c')
| -rw-r--r-- | drivers/infiniband/hw/qib/qib_driver.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/qib/qib_driver.c b/drivers/infiniband/hw/qib/qib_driver.c index f15ce076ac49..9cd193603fb1 100644 --- a/drivers/infiniband/hw/qib/qib_driver.c +++ b/drivers/infiniband/hw/qib/qib_driver.c @@ -335,7 +335,7 @@ u32 qib_kreceive(struct qib_ctxtdata *rcd, u32 *llic, u32 *npkts) smp_rmb(); /* prevent speculative reads of dma'ed hdrq */ } - for (last = 0, i = 1; !last; i += !last) { + for (last = 0, i = 1; !last && i <= 64; i += !last) { hdr = dd->f_get_msgheader(dd, rhf_addr); eflags = qib_hdrget_err_flags(rhf_addr); etype = qib_hdrget_rcv_type(rhf_addr); |
