the new proc structure when performing a fork. This makes it much
easier to abort a fork operation and return an error if we run out
of KVA space.
The U-area pages are still wired down in {,u}vm_fork(), as before.
- release the correct page (ppsp[lcv], not pg)
- don't access the page's fields after we have released it
- in the uvm_objct case: move on to the next page if we've released
[should have been merged in on 1998/02/12, but we somehow missed it]
the very rare case of shared mappings that have amap's attached in a
reasonable way -- this is not currently causing any problems, but i
fixed it anyway. update the comment in this section of code and also
be smarter about avoiding needless calls to pmap_protect().
that we don't try and sync them later. should get rid of the
"uvm_vnp_sync: dying vnode on sync list" related warnings that were
occuring during a "make install."
the SPARC.
Remove the #ifdef COMPAT_13 for automatically adding a sharing type, since the
interface is *supposed* to support this.
Also modify the DIAGNOSTIC messages here a bit.
- Protect option headers from inclusion if ! _KERNEL or if _LKM.
- Make sure struct uvm_history is always the same size (not dependent
on NCPU).
- Add fmtlen and fnlen members to struct uvm_history_ent, which specify
the lengths fo the fmt and fn strings.
- Add name, namelen, and a list entry to struct uvm_history.
- When a history is initialized, place it on the global list of all histories.
the history buffers are "struct uvm_history_ent" to ensure proper
alignment (eg, alpha). this fixes a boottime panic when the pdhist was
used before it had been initialised.
for the pagedaemon allocating from kmem_object. this should
prevent from the pagedaemon running out of memory and deadlocking.
fix counting of wired pages.
add some debugging code to detect attempts to reference free vm_pages.
thorpej