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authorDennis Zhou <dennis@kernel.org>2019-02-04 23:20:04 +0300
committerDavid Sterba <dsterba@suse.com>2019-02-25 16:13:32 +0300
commit7bf4994304e27454c5cf99de1d43033cb29b34fd (patch)
tree573166fb907ca78db50dfcad60921bf09a9f4923 /fs/btrfs/zlib.c
parent92ee55303616a18135be91deff51799a5de81f9a (diff)
downloadlinux-7bf4994304e27454c5cf99de1d43033cb29b34fd.tar.xz
btrfs: plumb level through the compression interface
Zlib compression supports multiple levels, but doesn't require changing in how a workspace itself is created and managed. Zstd introduces a different memory requirement such that higher levels of compression require more memory. This requires changes in how the alloc()/get() methods work for zstd. This pach plumbs compression level through the interface as a parameter in preparation for zstd compression levels. This gives the compression types opportunity to create/manage based on the compression level. Reviewed-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: Josef Bacik <josef@toxicpanda.com> Signed-off-by: Dennis Zhou <dennis@kernel.org> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/zlib.c')
-rw-r--r--fs/btrfs/zlib.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/fs/btrfs/zlib.c b/fs/btrfs/zlib.c
index 773d1d70ceec..fc883a14ecbf 100644
--- a/fs/btrfs/zlib.c
+++ b/fs/btrfs/zlib.c
@@ -39,9 +39,9 @@ static void zlib_cleanup_workspace_manager(void)
btrfs_cleanup_workspace_manager(&wsm);
}
-static struct list_head *zlib_get_workspace(void)
+static struct list_head *zlib_get_workspace(unsigned int level)
{
- return btrfs_get_workspace(&wsm);
+ return btrfs_get_workspace(&wsm, level);
}
static void zlib_put_workspace(struct list_head *ws)
@@ -58,7 +58,7 @@ static void zlib_free_workspace(struct list_head *ws)
kfree(workspace);
}
-static struct list_head *zlib_alloc_workspace(void)
+static struct list_head *zlib_alloc_workspace(unsigned int level)
{
struct workspace *workspace;
int workspacesize;
@@ -70,6 +70,7 @@ static struct list_head *zlib_alloc_workspace(void)
workspacesize = max(zlib_deflate_workspacesize(MAX_WBITS, MAX_MEM_LEVEL),
zlib_inflate_workspacesize());
workspace->strm.workspace = kvmalloc(workspacesize, GFP_KERNEL);
+ workspace->level = level;
workspace->buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
if (!workspace->strm.workspace || !workspace->buf)
goto fail;