diff options
| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2007-05-02 19:27:14 +0200 |
|---|---|---|
| committer | Andi Kleen <andi@basil.nowhere.org> | 2007-05-02 19:27:14 +0200 |
| commit | d6dd61c831226f9cd7750885da04d360d6455101 (patch) | |
| tree | 30f84a429821d207f7de5dd6225d3d9515042c0a /kernel/fork.c | |
| parent | 5311ab62cdc7788784971ed816ce85e926f3e994 (diff) | |
[PATCH] x86: PARAVIRT: add hooks to intercept mm creation and destruction
Add hooks to allow a paravirt implementation to track the lifetime of
an mm. Paravirtualization requires three hooks, but only two are
needed in common code. They are:
arch_dup_mmap, which is called when a new mmap is created at fork
arch_exit_mmap, which is called when the last process reference to an
mm is dropped, which typically happens on exit and exec.
The third hook is activate_mm, which is called from the arch-specific
activate_mm() macro/function, and so doesn't need stub versions for
other architectures. It's called when an mm is first used.
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: linux-arch@vger.kernel.org
Cc: James Bottomley <James.Bottomley@SteelEye.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/fork.c')
| -rw-r--r-- | kernel/fork.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/fork.c b/kernel/fork.c index 6af959c034d..ffccefb28b6 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -286,6 +286,8 @@ static inline int dup_mmap(struct mm_struct *mm, struct mm_struct *oldmm) if (retval) goto out; } + /* a new mm has just been created */ + arch_dup_mmap(oldmm, mm); retval = 0; out: up_write(&mm->mmap_sem); |