| commit | ef96576ef50b8bbd4c63b9cebab372cb7cf4ba67 | |
| author | John David Anglin <dave.anglin@bell.net> | |
| Tue, 15 Jan 2013 00:45:00 +0000 (14 19:45 -0500) | ||
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | |
| Thu, 28 Feb 2013 14:32:27 +0000 (28 06:32 -0800) | ||
| tree | bf2a6d1637c5b3d84b4fcd71d0970f18ada28aac | treesnapshot (tar.gz zip) |
| parent | 534aaed9080ba82974e8d2a71e43a362918138f8 | commitdiff |
Purge existing TLB entries in set_pte_at and ptep_set_wrprotect
commit 7139bc1579901b53db7e898789e916ee2fb52d78 upstream.
This patch goes a long way toward fixing the minifail bug, and
it significantly improves the stability of SMP machines such as
the rp3440. When write protecting a page for COW, we need to
purge the existing translation. Otherwise, the COW break
doesn't occur as expected because the TLB may still have a stale entry
which allows writes.
[jejb: fix up checkpatch errors]
Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 7139bc1579901b53db7e898789e916ee2fb52d78 upstream.
This patch goes a long way toward fixing the minifail bug, and
it significantly improves the stability of SMP machines such as
the rp3440. When write protecting a page for COW, we need to
purge the existing translation. Otherwise, the COW break
doesn't occur as expected because the TLB may still have a stale entry
which allows writes.
[jejb: fix up checkpatch errors]
Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| arch/parisc/include/asm/pgtable.h | diffblobblamehistory | |
| arch/parisc/kernel/cache.c | diffblobblamehistory |