txt2data receives it wlocked

fault must wlock since Pages changes and mmu.c needs protection. check for wraparound. SG_SHARED like SG_PHYS

newpage wunlock not rlock. nil convention

findseg when lock not needed (since current process). evenaddr calls. no PGSZ ref

revise r/wlock conventions for segs. add findseg (locate w/o locking, up to caller)

seg convention changed to ronly flag not lock function. add findseg. newpage takes RWlock

temporary macros when checking seg rlock/wlock bug

no page hash table. remove unused values. pa is uintmem not uintptr. change convention on seglock. add mdom, not yet used

better hash. LRU cache enabled. extra error check on image read

devproc access is not read-only

qfree not free. add waserror/poperror to collect chan

no newline in panic. record lastlock. extra check when getting pc for debugging

MAXRPC not 8192+... . spurious newline

sprint -> snprint

ensure prflush on newline. != nil convention. poperror before free convention