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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>
This commit is contained in:
Ralph Campbell 2010-08-02 22:39:24 +00:00 committed by Roland Dreier
parent 4c6931f5d4
commit 3e3aed0b88
1 changed files with 1 additions and 1 deletions
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2
drivers/infiniband/hw/qib/qib_driver.c
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@ -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);