A device driver has pool


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 · These can fragment the system pools and eventually cause system crashes. When you have a kernel debugger connected to a test computer running Driver Verifier, if Driver Verifier detects a violation, Windows breaks into the debugger and displays a brief description of the error. In fact, the kernel does implement a facility to create this sort of pool, which is often called a lookaside cache. Device drivers normally do not exhibit the sort of memory behavior that justifies using a lookaside cache, but there can be exceptions; the USB and SCSI drivers in Linux use caches. A device driver using DMA has to talk to hardware connected to the interface bus, which uses physical addresses, whereas program code uses virtual addresses. As a matter of fact, the situation is slightly more complicated than that. Here, name is a name for the pool, dev is your device structure.


Allocation requests are handled by going to a pool that holds sufficiently large objects and handing an entire memory chunk back to the requester. The memory management scheme is quite complex, and the details of it are not normally all that interesting to device driver writers. Here, name is a name for the pool, dev is your device structure, size is the size of the buffers to be allocated from this pool, align is the required hardware alignment for allocations from the pool (expressed in bytes), and allocation is, if nonzero, a memory boundary that allocations should not exceed. ⚾️0xd0 driver_corrupted_mmpool 🚑0xd1 driver_irql_not_less_or_equal 🎨0xd2 bugcode_id_driver 🍪0xd3 driver_portion_must_be_nonpaged 🎺0xd4 scan_at_raised.


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