Date: Sun, 12 Oct 2003 20:28:32 -0700 (PDT) From: Alan Cox <alc@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/i386/i386 pmap.c Message-ID: <200310130328.h9D3SWSo084974@repoman.freebsd.org>
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alc 2003/10/12 20:28:32 PDT
FreeBSD src repository
Modified files:
sys/i386/i386 pmap.c
Log:
- Modify pmap_is_current() to return FALSE when a pmap's page table is in
use because a kernel thread is borrowing it. The borrowed page table
can change spontaneously, making any dependence on its continued use
subject to a race condition.
- _pmap_unwire_pte_hold() cannot use pmap_is_current(): If a change is
made to a page table page mapping for a borrowed page table, the TLB
must be updated.
In collaboration with: tegge
Revision Changes Path
1.447 +12 -4 src/sys/i386/i386/pmap.c
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