CVS commit: src/sys/uvm

["Jaromir Dolecek" <jdolecek%netbsd.org@localhost>]

Module Name:    src
Committed By:   jdolecek
Date:           Thu Jun 25 14:04:30 UTC 2020

Modified Files:
        src/sys/uvm: uvm_bio.c

Log Message:
make ubc_winshift / ubc_winsize constant, and based on whatever is bigger
of (1 << UBC_WINSHIFT, MAX_PAGE_SIZE)

given that default UBC_WINSHIFT is 13, this changes behaviour only
for mips and powerpc (BookE/OEA), which will now have twice as much
memory used for UBC windows; if this ever becomes a problem, it's
possible to reduce ubc_nwins in MD code similar to what is done on sparc

this eliminates variable-length arrays in ubc_fault(),
ubc_uiomove(), and ubc_zerorange() so that the stack usage can be
determined and checked in compile time


To generate a diff of this commit:
cvs rdiff -u -r1.117 -r1.118 src/sys/uvm/uvm_bio.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.