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authorNaohiro Aota <naohiro.aota@wdc.com>2021-11-11 08:14:38 +0300
committerDavid Sterba <dsterba@suse.com>2022-01-03 17:09:44 +0300
commit16beac87e95e2fb278b552397c8260637f8a63f7 (patch)
treee910dca597ba55b01665ef97b6fc812f9245984a /fs/btrfs/zoned.h
parentd21deec5e7e6f9b02259cff171cbf1e53fb98429 (diff)
downloadlinux-16beac87e95e2fb278b552397c8260637f8a63f7.tar.xz
btrfs: zoned: cache reported zone during mount
When mounting a device, we are reporting the zones twice: once for checking the zone attributes in btrfs_get_dev_zone_info and once for loading block groups' zone info in btrfs_load_block_group_zone_info(). With a lot of block groups, that leads to a lot of REPORT ZONE commands and slows down the mount process. This patch introduces a zone info cache in struct btrfs_zoned_device_info. The cache is populated while in btrfs_get_dev_zone_info() and used for btrfs_load_block_group_zone_info() to reduce the number of REPORT ZONE commands. The zone cache is then released after loading the block groups, as it will not be much effective during the run time. Benchmark: Mount an HDD with 57,007 block groups Before patch: 171.368 seconds After patch: 64.064 seconds While it still takes a minute due to the slowness of loading all the block groups, the patch reduces the mount time by 1/3. Link: https://lore.kernel.org/linux-btrfs/CAHQ7scUiLtcTqZOMMY5kbWUBOhGRwKo6J6wYPT5WY+C=cD49nQ@mail.gmail.com/ Fixes: 5b316468983d ("btrfs: get zone information of zoned block devices") CC: stable@vger.kernel.org Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/zoned.h')
-rw-r--r--fs/btrfs/zoned.h8
1 files changed, 6 insertions, 2 deletions
diff --git a/fs/btrfs/zoned.h b/fs/btrfs/zoned.h
index e53ab7b96437..4344f4818389 100644
--- a/fs/btrfs/zoned.h
+++ b/fs/btrfs/zoned.h
@@ -28,6 +28,7 @@ struct btrfs_zoned_device_info {
unsigned long *seq_zones;
unsigned long *empty_zones;
unsigned long *active_zones;
+ struct blk_zone *zone_cache;
struct blk_zone sb_zones[2 * BTRFS_SUPER_MIRROR_MAX];
};
@@ -35,7 +36,7 @@ struct btrfs_zoned_device_info {
int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos,
struct blk_zone *zone);
int btrfs_get_dev_zone_info_all_devices(struct btrfs_fs_info *fs_info);
-int btrfs_get_dev_zone_info(struct btrfs_device *device);
+int btrfs_get_dev_zone_info(struct btrfs_device *device, bool populate_cache);
void btrfs_destroy_dev_zone_info(struct btrfs_device *device);
int btrfs_check_zoned_mode(struct btrfs_fs_info *fs_info);
int btrfs_check_mountopts_zoned(struct btrfs_fs_info *info);
@@ -76,6 +77,7 @@ bool btrfs_can_activate_zone(struct btrfs_fs_devices *fs_devices,
void btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info, u64 logical,
u64 length);
void btrfs_clear_data_reloc_bg(struct btrfs_block_group *bg);
+void btrfs_free_zone_cache(struct btrfs_fs_info *fs_info);
#else /* CONFIG_BLK_DEV_ZONED */
static inline int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos,
struct blk_zone *zone)
@@ -88,7 +90,8 @@ static inline int btrfs_get_dev_zone_info_all_devices(struct btrfs_fs_info *fs_i
return 0;
}
-static inline int btrfs_get_dev_zone_info(struct btrfs_device *device)
+static inline int btrfs_get_dev_zone_info(struct btrfs_device *device,
+ bool populate_cache)
{
return 0;
}
@@ -232,6 +235,7 @@ static inline void btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info,
static inline void btrfs_clear_data_reloc_bg(struct btrfs_block_group *bg) { }
+static inline void btrfs_free_zone_cache(struct btrfs_fs_info *fs_info) { }
#endif
static inline bool btrfs_dev_is_sequential(struct btrfs_device *device, u64 pos)