https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=201327
Bug ID: 201327
Summary: [patch] avoid KVA fragment in memguard when using
MG_GUARD_AROUND option
Product: Base System
Version: 11.0-CURRENT
Hardware: Any
OS: Any
Status: New
Keywords: patch
Severity: Affects Some People
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
Keywords: patch
Created attachment 158323
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=158323&action=edit
memguard_cursor patch
With MG_GUARD_AROUND option, memguard increases memguard_cursor with one more
PAGE_SIZE.
This results in one PAGE_SIZE fragment in KVA.
* before patch
old memguard_cursor: 0xfffffe0000400000
memeguard:allocate 0x3000
next memguard_curor: 0xfffffe0000404000
* after patch
old memguard_cursor: 0xfffffe0000400000
memeguard:allocate 0x3000
next memguard_curor: 0xfffffe0000403000
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