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Zhengchao An
0ebe00b383
Progress/timeout checks only ran when file_count advanced, so trees of directory-only or error-dense entries (dirs, traversal errors, symlinks never increment file_count) bypassed the entire cooperative time budget and held the blocking thread for unbounded time, while each error entry logged its own warn — permission-dense trees flooded the log (S13). The stall detector was structurally unreachable: it fired on 'no file progress between checks', but checks themselves only ran when file progress happened, so RUSTFS_CAPACITY_STALL_TIMEOUT never did anything since its introduction (S09). - Progress checks (timeout + early-sampling entry) are now driven by a visited-entry counter that also advances on directories and errors, so every tree shape reaches the budget checks. - Remove the unreachable stall detector and its plumbing end to end (ProgressMonitor fields, ScanLimits, config getter, env const, stall metric). Genuine walker wedges are handled by the hard outer wall-clock budget from backlog#1017; no decorative protection is left. - Cap per-entry error warns at 10 per scan with an explicit suppression notice; had_partial_errors still records the condition. Ref: rustfs/backlog#1016 (S09+S13 from audit rustfs/backlog#1010)