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Fix timeout overflow caused by "scsictl format" on machines HZ==100.
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well (not at all) with shortages of the vm_map where the pages are mapped
(usually kmem_map).
Try to deal with it:
- group all information the backend allocator for a pool in a separate
struct. The pool will only have a pointer to that struct.
- change the pool_init API to reflect that.
- link all pools allocating from the same allocator on a linked list.
- Since an allocator is responsible to wait for physical memory it will
only fail (waitok) when it runs out of its backing vm_map, carefully
drain pools using the same allocator so that va space is freed.
(see comments in code for caveats and details).
- change pool_reclaim to return if it actually succeeded to free some
memory, use that information to make draining easier and more efficient.
- get rid of PR_URGENT, noone uses it.
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(1.26 -> 1.83)...
Highlights:
o tag queue support
o fas366 support (doesn't work yet on sparc, but does on sparc64)
o tons more
(thanks to hugh, fgsch and beck for testing)
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>From NetBSD.
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Allocate SCSI message buffers in ncr53c9x_attach(), with a provision
for front-ends to override the allocation to avoid alignment
handling in their DMA engines. Note that that ncr53c9x_msgout()
can request a 1 byte DMA transfer that would be difficult to break up.
Eliminate the degenerate loop in `ncr53c9x_intr()'. Retain the delay heuristic
it implemented under the label `shortcut:' and only use it in these cases:
(1) after successful re-relection,
(2) after receiving command-complete status, and
(3) during message-in handshake.
If we have an NCR53CF9x (indicated by the front-end by setting a flag
in the softc's new "features" word), set FSCSI bit in CFG3 if the sync
period is <= 200ns, or clear it otherwise.
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Apologies if this breaks anyone else using the MI ESP driver...
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and NetBSD.
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