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| author | Konstantin Belousov <kib@FreeBSD.org> | 2015-12-05 08:46:41 +0000 |
|---|---|---|
| committer | Konstantin Belousov <kib@FreeBSD.org> | 2015-12-05 08:46:41 +0000 |
| commit | 1ac627629b0da0e13712763412b5286ef34984d0 (patch) | |
| tree | 0b8d25f54b98431297c7e152ca3c9bd74fe76a06 /sys/i386 | |
| parent | 4d982a25629d175e8394c7228a91b14c8113b87e (diff) | |
| download | src-1ac627629b0da0e13712763412b5286ef34984d0.tar.gz src-1ac627629b0da0e13712763412b5286ef34984d0.zip | |
In the pmap_set_pg() function, which enables the global bit on the
ptes mapping the kernel on CPUs where global TLB entries are
supported, revert to flushing only non-global entries, i.e. to the
pre-r291688 state. There is no need to flush global TLB entries,
since only global entries created during the previous iterations of
the loop could exist at this moment.
Submitted by: alc
Differential revision: https://reviews.freebsd.org/D4368
Notes
Notes:
svn path=/head/; revision=291850
Diffstat (limited to 'sys/i386')
| -rw-r--r-- | sys/i386/i386/pmap.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sys/i386/i386/pmap.c b/sys/i386/i386/pmap.c index dff9fc555df4..5ae41a316deb 100644 --- a/sys/i386/i386/pmap.c +++ b/sys/i386/i386/pmap.c @@ -655,7 +655,7 @@ pmap_set_pg(void) va = KERNBASE + KERNLOAD; while (va < endva) { pdir_pde(PTD, va) |= pgeflag; - invltlb_glob(); /* Play it safe, invltlb() every time */ + invltlb(); /* Flush non-PG_G entries. */ va += NBPDR; } } else { @@ -664,7 +664,7 @@ pmap_set_pg(void) pte = vtopte(va); if (*pte) *pte |= pgeflag; - invltlb_glob(); /* Play it safe, invltlb() every time */ + invltlb(); /* Flush non-PG_G entries. */ va += PAGE_SIZE; } } |