Module Name: src
Committed By: maxv
Date: Fri Jul 3 16:17:25 UTC 2020
Modified Files:
src/sys/arch/x86/x86: vm_machdep.c
Log Message:
In cpu_uarea_{alloc,free}:
- My previous change in this file was not correct, kremove does not free
the underlying PA, which caused a very slow leak under memory pressure.
Rework to correctly free the PA.
- Add a second redzone, this time after the stack, to catch several stack
overflows. The main concern is read overflows which leak the heap that
follows the stack.
- UVM_KMF_WAITVA doesn't fail, so remove error check.
- Add KASSERTs.
To generate a diff of this commit:
cvs rdiff -u -r1.42 -r1.43 src/sys/arch/x86/x86/vm_machdep.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
