Date: Thu, 29 Jun 2000 15:43:44 -0700 (PDT) From: Jin Guojun (DSD staff) <jin@george.lbl.gov> To: hackers@freebsd.org Subject: possible doing context switch between network and link layers? Message-ID: <200006292243.e5TMhim19889@portnoy.lbl.gov>
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Hi,
Try to control the NIC output, instead of dropping the packet, I would
like to do context switch on current sending process. tsleep() seems not
to be a right mechanism for this purpose because it will panic in the kernel
wherever between the network and link layers the tsleep() is put -- e.g.
ether_output()
{
...
if (IF_QFULL) {
tsleep(m, PSOCK, "pause NIC", 1);
if (IF_QFULL)
DROP_Q;
}
...
}
Is there other context switch mechanism for this purpose? or
is it impossible to do the context switch at network and link layers?
-Jin
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