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| author | Seth Jennings <sjenning@linux.vnet.ibm.com> | 2012-07-02 21:15:52 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-07-09 18:35:00 (GMT) |
| commit | b74185108668ef966e663878adbad65e03bfcb43 (patch) | |
| tree | 39e367491f761ba93fbddc56a93f353b021552cc /drivers/staging/zcache | |
| parent | 166cfda752ca22eb6912614993b85f9a997dbd8f (diff) | |
| download | linux-b74185108668ef966e663878adbad65e03bfcb43.tar.xz | |
staging: zsmalloc: add mapping modes
This patch improves mapping performance in zsmalloc by getting
usage information from the user in the form of a "mapping mode"
and using it to avoid unnecessary copying for objects that span
pages.
Signed-off-by: Seth Jennings <sjenning@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/zcache')
| -rw-r--r-- | drivers/staging/zcache/zcache-main.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/staging/zcache/zcache-main.c b/drivers/staging/zcache/zcache-main.c index 2b5c73c..c214977 100644 --- a/drivers/staging/zcache/zcache-main.c +++ b/drivers/staging/zcache/zcache-main.c @@ -716,7 +716,7 @@ static unsigned long zv_create(struct zs_pool *pool, uint32_t pool_id, goto out; atomic_inc(&zv_curr_dist_counts[chunks]); atomic_inc(&zv_cumul_dist_counts[chunks]); - zv = zs_map_object(pool, handle); + zv = zs_map_object(pool, handle, ZS_MM_WO); zv->index = index; zv->oid = *oid; zv->pool_id = pool_id; @@ -735,7 +735,7 @@ static void zv_free(struct zs_pool *pool, unsigned long handle) uint16_t size; int chunks; - zv = zs_map_object(pool, handle); + zv = zs_map_object(pool, handle, ZS_MM_RW); ASSERT_SENTINEL(zv, ZVH); size = zv->size + sizeof(struct zv_hdr); INVERT_SENTINEL(zv, ZVH); @@ -757,7 +757,7 @@ static void zv_decompress(struct page *page, unsigned long handle) int ret; struct zv_hdr *zv; - zv = zs_map_object(zcache_host.zspool, handle); + zv = zs_map_object(zcache_host.zspool, handle, ZS_MM_RO); BUG_ON(zv->size == 0); ASSERT_SENTINEL(zv, ZVH); to_va = kmap_atomic(page); |