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| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2007-05-02 21:27:14 +0400 |
|---|---|---|
| committer | Andi Kleen <andi@basil.nowhere.org> | 2007-05-02 21:27:14 +0400 |
| commit | d6dd61c831226f9cd7750885da04d360d6455101 (patch) | |
| tree | 30f84a429821d207f7de5dd6225d3d9515042c0a /mm/mmap.c | |
| parent | 5311ab62cdc7788784971ed816ce85e926f3e994 (diff) | |
| download | linux-d6dd61c831226f9cd7750885da04d360d6455101.tar.xz | |
[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 'mm/mmap.c')
| -rw-r--r-- | mm/mmap.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index 84f997da78d7..88da687bde89 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -29,6 +29,7 @@ #include <asm/uaccess.h> #include <asm/cacheflush.h> #include <asm/tlb.h> +#include <asm/mmu_context.h> #ifndef arch_mmap_check #define arch_mmap_check(addr, len, flags) (0) @@ -1979,6 +1980,9 @@ void exit_mmap(struct mm_struct *mm) unsigned long nr_accounted = 0; unsigned long end; + /* mm's last user has gone, and its about to be pulled down */ + arch_exit_mmap(mm); + lru_add_drain(); flush_cache_mm(mm); tlb = tlb_gather_mmu(mm, 1); |