CVSROOT: /cvs
Module name: src
Changes by: m...@cvs.openbsd.org 2023/05/13 03:24:59
Modified files:
sys/uvm : uvm_aobj.c uvm_aobj.h uvm_page.c uvm_pager.c
Log message:
Put back in the simplification of the aiodone daemon.
Previous "breakage" of the swap on arm64 has been found to be an issue
on one machine the rockpro/arm64 related to a deadlock built into the
sdmmc(4) stack interacting with swapping code both running under
KERNEL_LOCK().
This issue is easily reproducible on -current and entering swap when
building LLVM on a rockpro crashes the machine by memory corruption.
Tested by mlarkin@ on octeon & i386, by myself on amd64 & arm64 and by
sthen@ on i386 port bulk.
ok beck@ some time ago.
Previous commit message:
Simplify the aiodone daemon which is only used for async writes.
- Remove unused support for asynchronous read, including error conditions
- Grab the proper lock for each page that has been written to swap. This
allows to enable an assertion in uvm_page_unbusy().
- Move the uvm_anon_release() call outside of uvm_page_unbusy() and
assert for the different anon cases.
ok beck@, kettenis@
