btrfs: zoned: don't force read-only on transient -EAGAIN from reloc merge

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On a zoned FS, btrfs_delayed_refs_rsv_refill() returns -EAGAIN whenever
the over-committed metadata plus the zone_unusable bytes exceeds the
usable size in a metadata block-group to avoid heavy over-commit of
metadata and early ENOSPC in one transaction.

If this happens while doing reclaim, the transaction is getting aborted.

Treat -EAGAIN as a soft, retryable condition in case of block-group
reclaim.

Reported-by: Damien Le Moal <dlemoal@kernel.org>
Fixes: 7bcb04de98 ("btrfs: zoned: cap delayed refs metadata reservation to avoid overcommit")
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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Johannes Thumshirn 2026-06-23 13:38:51 +02:00 • committed by David Sterba

parent 097cdc8462

commit e549093c11

2 changed files with 51 additions and 6 deletions

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8

fs/btrfs/block-group.c

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49

fs/btrfs/relocation.c

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