Attached are two boot logs with sources as of today (Sunday 8/28/2004) with both the standard GENERIC kernel configuration and the generic kernel modified to include a single additional device, the PUC device. The system is a Dell GX300 Dual PIII/733 with PCI 3COM Ethernet, a 3COM internal modem, and 29160 SCSI. Basically, any PCI SIO device hogs its interrupt if the PUC device is not also in the kernel, and this causes real problems for any environment like mine where pulling the modem is not trivial. Does the distributed GENERIC kernel have room for the PUC device? Are there side effects that PUC should be excluded from GENERIC? As a bonus, there appears to be a bug with kernel locking exposed by the problem. With the stock generic kernel, the XL device reports it couldn't map the interrupt, and then a lock order reversal is reported. (See the attached log for the gory details). Suggestions? The machine is pure test mode now. I can test either CVS updated source or private patches.
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