diff options
| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-07-23 23:15:28 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-08-20 10:24:56 +1000 |
| commit | c7cc58a1ad8dfe3c199d3b6ce50412b86dd3edaf (patch) | |
| tree | 1d1ded72de81743ddd1306677d64757136972402 /arch/powerpc/mm/tlb_hash32.c | |
| parent | cf54dc7cd4f9aab55cd3e1794b0b74c3c88cd1a0 (diff) | |
powerpc/mm: Rework & cleanup page table freeing code path
That patch used to just add a hook to page table flushing but
pulling that string brought out a whole bunch of issues, so it
now does that and more:
- We now make the RCU batching of page freeing SMP only, as I
believe it was intended initially. We make a few more things compile
to nothing on !CONFIG_SMP
- Some macros are turned into functions, though that forced me to
out of line a few stuffs due to unsolvable include depenencies,
however it's probably better that way anyway, it's not -that-
critical code path.
- 32-bit didn't call pte_free_finish() on tlb_flush() which means
that it wouldn't push out the batch to RCU for delayed freeing when
a bunch of page tables have been freed, they would just stay in there
until the batch gets full.
64-bit BookE will use that hook to maintain the virtually linear
page tables or the indirect entries in the TLB when using the
HW loader.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/mm/tlb_hash32.c')
| -rw-r--r-- | arch/powerpc/mm/tlb_hash32.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/powerpc/mm/tlb_hash32.c b/arch/powerpc/mm/tlb_hash32.c index 65190587a36..8aaa8b7eb32 100644 --- a/arch/powerpc/mm/tlb_hash32.c +++ b/arch/powerpc/mm/tlb_hash32.c @@ -71,6 +71,9 @@ void tlb_flush(struct mmu_gather *tlb) */ _tlbia(); } + + /* Push out batch of freed page tables */ + pte_free_finish(); } /* |