CVS commit: src/sys/uvm

["Taylor R Campbell" <riastradh%netbsd.org@localhost>]

Module Name:    src
Committed By:   riastradh
Date:           Thu Aug 15 11:33:21 UTC 2024

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

Log Message:
uvm_map(9): Apply the same orig_hint clamp again to the same entry.

Previous change dealt with case like length=0x1000 and:

[0x7defb000,0x7defc000)         entry above orig_hint (entry->next)
0x77895000                      orig_hint
[0x77894000,0x77895000)         entry below orig_hint (entry)

by changing

        entry->next->start - length

to

        MIN(orig_hint, entry->next->start - length)

in order to enforce monotonicity of search.

In this case, if the tree search for a gap has failed, we retry with
a list search with exactly the same orig_hint and entry -- nothing
has changed them (only hint and tmp).  So apply the same clamping.

PR kern/51254: uvm assertion "!topdown || hint <= orig_hint" failed


To generate a diff of this commit:
cvs rdiff -u -r1.424 -r1.425 src/sys/uvm/uvm_map.c

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