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Date: Wed, 26 Jan 2011 11:25:08 -0600 From: Robert Jennings <rcj@...ux.vnet.ibm.com> To: Nitin Gupta <ngupta@...are.org> Cc: Greg Kroah-Hartman <gregkh@...e.de>, Robert Jennings <rcj@...ux.vnet.ibm.com>, Pekka Enberg <penberg@...helsinki.fi>, devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org Subject: [PATCH 4/7] zram/xvmalloc: free bit block insertion optimization There is no need to set the bits in the first- and second-level indices to indicate a free page when we know that a free page existed at this level. Signed-off-by: Robert Jennings <rcj@...ux.vnet.ibm.com> --- drivers/staging/zram/xvmalloc.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/drivers/staging/zram/xvmalloc.c b/drivers/staging/zram/xvmalloc.c index a507f95..b3622f1 100644 --- a/drivers/staging/zram/xvmalloc.c +++ b/drivers/staging/zram/xvmalloc.c @@ -205,6 +205,8 @@ static void insert_block(struct xv_pool *pool, struct page *page, u32 offset, nextblock->link.prev_page = page; nextblock->link.prev_offset = offset; put_ptr_atomic(nextblock, KM_USER1); + /* If there was a next page then the free bits are set. */ + return; } __set_bit(slindex % BITS_PER_LONG, &pool->slbitmap[flindex]); -- 1.6.0.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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