the mapping is:
VM_PAGER_OK 0
VM_PAGER_BAD <unused>
VM_PAGER_FAIL <unused>
VM_PAGER_PEND 0 (see below)
VM_PAGER_ERROR EIO
VM_PAGER_AGAIN EAGAIN
VM_PAGER_UNLOCK EBUSY
VM_PAGER_REFAULT ERESTART
for async i/o requests, it used to be possible for the request to
be convert to sync, and the pager would return VM_PAGER_OK or VM_PAGER_PEND
to indicate whether the caller should perform post-i/o cleanup.
this is no longer allowed; pagers must now return 0 to indicate that
the async i/o was successfully started, and the caller never needs to
worry about doing the post-i/o cleanup.
support, which corresponds to one for each CPU_* option, or one for each
cpufunc structure.
Also remove some more residual code for the support of multiple and non-ARM
CPUs.
return NULL instead of restarting the loop since we might sleep
while starting the i/o. this tells getblk() to check if someone else
created the buffer while we slept. from OpenBSD.
- Load the DMA address a byte at a time, and
- Use bus_space_read_stream_2() instead of bus_space_read_2() when reading
the byte-stream of configuration data from the card.
Sanity-checked on both i386 and sandpoint. Reviewed by ad.
commands -- profiling shows this to be a major win over flushing the
entire cache (since the likelihood is that such lines won't be in the
cache anyway).
Patch supplied by Richard Earnshaw.
- Set the destination address register properly for "perfect match" mode
in the receive filter setup.
- Do not enable multicast receipt unless we are configured for some multicast.
- Use the "recommended settings" (which set undocumented registers and
documented-as-reserved fields) for the silicon revision 302h (not 203h,
as documented in one of the two places in the manual) because the
documentation is unclear and because those settings fix the card's
behavior in "perfect match" mode. Without those settings, the card
was generating random CRC/invalid symbol errors and generally not
working unless it was set to be promiscuous.
With these changes, this week's version of the Netgear FA311 works for me.
each of the basic types (anonymous data, executable image, cached files)
and prevent the pagedaemon from reusing a given page if that would reduce
the count of that type of page below a sysctl-setable minimum threshold.
the thresholds are controlled via three new sysctl tunables:
vm.anonmin, vm.vnodemin, and vm.vtextmin. these tunables are the
percentages of pageable memory reserved for each usage, and we do not allow
the sum of the minimums to be more than 95% so that there's always some
memory that can be reused.
is derived mostly from the arm32 version, but with a check for an obscure ARM2
bug thrown in.
arm26 fpu and cpu drivers use the new interface for catching undefined
instructions.
