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| author | Leonid Bloch <lbloch@janustech.com> | 2018-09-26 19:04:44 +0300 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2018-10-01 12:51:12 +0200 |
| commit | 80668d0fb735f0839a46278a7d42116089b82816 (patch) | |
| tree | 5a445e1c51c49d5846829c2c5f8043a3741bd556 /block | |
| parent | b749562d9822d14ef69c9eaa5f85903010b86c30 (diff) | |
| download | qemu-80668d0fb735f0839a46278a7d42116089b82816.zip qemu-80668d0fb735f0839a46278a7d42116089b82816.tar.gz qemu-80668d0fb735f0839a46278a7d42116089b82816.tar.bz2 | |
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 <lbloch@janustech.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block')
| -rw-r--r-- | block/qcow2.h | 6 |
1 files changed, 5 insertions, 1 deletions
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 |