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btrfs: don't print relocation messages from auto reclaim

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When BTRFS is doing automatic block-group reclaim, it is spamming the
kernel log messages a lot.

Add a 'verbose' parameter to btrfs_relocate_chunk() and
btrfs_relocate_block_group() to control the verbosity of these log
message. This way the old behaviour of printing log messages on a
user-space initiated balance operation can be kept while excessive log
spamming due to auto reclaim is mitigated.

Reviewed-by: Boris Burkov <boris@bur.io>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Johannes Thumshirn 2025-07-08 08:55:03 +02:00 • committed by David Sterba
parent a507904090
commit 5ae011bcbb
5 changed files with 21 additions and 13 deletions
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2
fs/btrfs/block-group.c
View file

@ -1953,7 +1953,7 @@ void btrfs_reclaim_bgs_work(struct work_struct *work)
spin_unlock(&bg->lock);
trace_btrfs_reclaim_block_group(bg);
ret = btrfs_relocate_chunk(fs_info, bg->start);
ret = btrfs_relocate_chunk(fs_info, bg->start, false);
if (ret) {
btrfs_dec_block_group_ro(bg);
btrfs_err(fs_info, "error relocating chunk %llu",

12
fs/btrfs/relocation.c
View file

@ -3908,7 +3908,8 @@ static const char *stage_to_string(enum reloc_stage stage)
/*
* function to relocate all extents in a block group.
*/
int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start)
int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start,
bool verbose)
{
struct btrfs_block_group *bg;
struct btrfs_root *extent_root = btrfs_extent_root(fs_info, group_start);
@ -4000,7 +4001,8 @@ int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start)
goto out;
}
describe_relocation(rc->block_group);
if (verbose)
describe_relocation(rc->block_group);
btrfs_wait_block_group_reservations(rc->block_group);
btrfs_wait_nocow_writers(rc->block_group);
@ -4044,8 +4046,10 @@ int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start)
if (rc->extents_found == 0)
break;
btrfs_info(fs_info, "found %llu extents, stage: %s",
rc->extents_found, stage_to_string(finishes_stage));
if (verbose)
btrfs_info(fs_info, "found %llu extents, stage: %s",
rc->extents_found,
stage_to_string(finishes_stage));
}
WARN_ON(rc->block_group->pinned > 0);

3
fs/btrfs/relocation.h
View file

@ -12,7 +12,8 @@ struct btrfs_trans_handle;
struct btrfs_ordered_extent;
struct btrfs_pending_snapshot;
int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start);
int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start,
bool verbose);
int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, struct btrfs_root *root);
int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
struct btrfs_root *root);

14
fs/btrfs/volumes.c
View file

@ -3412,7 +3412,8 @@ out:
return ret;
}
int btrfs_relocate_chunk(struct btrfs_fs_info *fs_info, u64 chunk_offset)
int btrfs_relocate_chunk(struct btrfs_fs_info *fs_info, u64 chunk_offset,
bool verbose)
{
struct btrfs_root *root = fs_info->chunk_root;
struct btrfs_trans_handle *trans;
@ -3442,7 +3443,7 @@ int btrfs_relocate_chunk(struct btrfs_fs_info *fs_info, u64 chunk_offset)
/* step one, relocate all the extents inside this chunk */
btrfs_scrub_pause(fs_info);
ret = btrfs_relocate_block_group(fs_info, chunk_offset);
ret = btrfs_relocate_block_group(fs_info, chunk_offset, true);
btrfs_scrub_continue(fs_info);
if (ret) {
/*
@ -3552,7 +3553,8 @@ again:
btrfs_release_path(path);
if (chunk_type & BTRFS_BLOCK_GROUP_SYSTEM) {
ret = btrfs_relocate_chunk(fs_info, found_key.offset);
ret = btrfs_relocate_chunk(fs_info, found_key.offset,
true);
if (ret == -ENOSPC)
failed++;
else
@ -4217,7 +4219,7 @@ again:
}
}
ret = btrfs_relocate_chunk(fs_info, found_key.offset);
ret = btrfs_relocate_chunk(fs_info, found_key.offset, true);
mutex_unlock(&fs_info->reclaim_bgs_lock);
if (ret == -ENOSPC) {
enospc_errors++;
@ -4985,7 +4987,7 @@ again:
goto done;
}
ret = btrfs_relocate_chunk(fs_info, chunk_offset);
ret = btrfs_relocate_chunk(fs_info, chunk_offset, true);
mutex_unlock(&fs_info->reclaim_bgs_lock);
if (ret == -ENOSPC) {
failed++;
@ -8198,7 +8200,7 @@ static int relocating_repair_kthread(void *data)
btrfs_info(fs_info,
"zoned: relocating block group %llu to repair IO failure",
target);
ret = btrfs_relocate_chunk(fs_info, target);
ret = btrfs_relocate_chunk(fs_info, target, true);
out:
if (cache)

3
fs/btrfs/volumes.h
View file

@ -763,7 +763,8 @@ void btrfs_describe_block_groups(u64 flags, char *buf, u32 size_buf);
int btrfs_resume_balance_async(struct btrfs_fs_info *fs_info);
int btrfs_recover_balance(struct btrfs_fs_info *fs_info);
int btrfs_pause_balance(struct btrfs_fs_info *fs_info);
int btrfs_relocate_chunk(struct btrfs_fs_info *fs_info, u64 chunk_offset);
int btrfs_relocate_chunk(struct btrfs_fs_info *fs_info, u64 chunk_offset,
bool verbose);
int btrfs_cancel_balance(struct btrfs_fs_info *fs_info);
bool btrfs_chunk_writeable(struct btrfs_fs_info *fs_info, u64 chunk_offset);
void btrfs_dev_stat_inc_and_print(struct btrfs_device *dev, int index);