on the amount of physical memory and limited by NMBCLUSTERS if present.
Architectures without direct mapping also limit it based on the kmem_map
size, which is used as backing store. On i386 and ARM, the maximum KVA
used for mbuf clusters is limited to 64MB by default.
The old default limits and limits based on GATEWAY have been removed.
key_registered_sb_max is hard-wired to a value derived from 2048
clusters.
refers to another "uobj" used to call pgo_get. Revert the wrong assertion
I made. My bad.
(This and pgo_get's possible ERESTART return value check is the only 2 behavioral
changes I made.)
Reported by drochner@, thanks.
- Lower fault routines don't care the vm_anon array found in upper lookup.
Don't pass the pointer down.
- The flag "shadowed" is known when we lookup upper layer. Don't need to
keep in the fault context struct.
the original values. Pointed out by rmind@, thanks.
In the lower fault case, if (*pgo_get)() can return ERESTART and we should
re-fault for that remains a question. The original code just returned the
error, so keep that behaviour for now. In case (*pgo_get)() really returns
ERESTART, pass EIO to tell the uvm_fault caller that (*pgo_get)() failed.
(As far as I grep callers don't check if the return value is ERESTART or not.
So assuming (*pgo_get)() never returns ERESTART should be a safe bet.)
Move local variables around to isolate contexts. Note that remaining variables
are global in that function, and some hold state across re-fault.
Slilently clean-up the "eoff" mess.
(Superfluous braces will go once things settle down.)
years ago when the kernel was modified to not alter ABI based on
DIAGNOSTIC, and now just call the respective function interfaces
(in lowercase). Plenty of mix'n match upper/lowercase has creeped
into the tree since then. Nuke the macros and convert all callsites
to lowercase.
no functional change
illegal. I examined all places where lbolt is referenced to make
sure there were pointer aliases of it passed to tsleep, but put a
KASSERT in m/ltsleep() just to be sure.
joerg