From 80668d0fb735f0839a46278a7d42116089b82816 Mon Sep 17 00:00:00 2001 From: Leonid Bloch Date: Wed, 26 Sep 2018 19:04:44 +0300 Subject: qcow2: Increase the default upper limit on the L2 cache size The upper limit on the L2 cache size is increased from 1 MB to 32 MB on Linux platforms, and to 8 MB on other platforms (this difference is caused by the ability to set intervals for cache cleaning on Linux platforms only). This is done in order to allow default full coverage with the L2 cache for images of up to 256 GB in size (was 8 GB). Note, that only the needed amount to cover the full image is allocated. The value which is changed here is just the upper limit on the L2 cache size, beyond which it will not grow, even if the size of the image will require it to. Signed-off-by: Leonid Bloch Reviewed-by: Alberto Garcia Reviewed-by: Kevin Wolf Signed-off-by: Kevin Wolf --- block/qcow2.h | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'block/qcow2.h') diff --git a/block/qcow2.h b/block/qcow2.h index 2f8c1fd..0f0e353 100644 --- a/block/qcow2.h +++ b/block/qcow2.h @@ -74,7 +74,11 @@ /* Must be at least 4 to cover all cases of refcount table growth */ #define MIN_REFCOUNT_CACHE_SIZE 4 /* clusters */ -#define DEFAULT_L2_CACHE_MAX_SIZE S_1MiB +#ifdef CONFIG_LINUX +#define DEFAULT_L2_CACHE_MAX_SIZE S_32MiB +#else +#define DEFAULT_L2_CACHE_MAX_SIZE S_8MiB +#endif #define DEFAULT_CLUSTER_SIZE S_64KiB -- cgit v1.1