CVSROOT: /cvs
Module name: src
Changes by: [email protected] 2016/07/09 11:13:05
Modified files:
sys/uvm : uvm_amap.c
Log message:
Fix bugs introduced with the amap rework
- The number of slots must be initialized in the chunk of a small amap,
otherwise unmapping() part of a mmap()'d range would delay freeing
of vm_anons for small amaps
- If the first chunk of a bucket is freed, check if the next chunk in
the list has to become the new first chunk
- Use a separate loop for each type of traversal (small amap, by bucket
by list) in amap_wiperange(). This makes the code easier to follow and
also fixes a bug where too many chunks were wiped out when traversing
by list
However, the last two bugs should happen only when turning a previously
private mapping into a shared one, then forking, and then having
both processes unmap a part of the mapping.
snap and ports build tested by krw@, review by kettenis@
