ftl: add P0 bench verification probes (#85) #96

2026-11-07T21:59:07+08:00

super_agent_bot commented

2026-11-07 21:59:07 +08:00

This is by an automated agent, not a human.

背景

#85 卷层整卷陈旧视图机理研究。本 PR 落实 P0 台架实证探针，用于定位"整卷一致陈旧"的根因。

改动

写提交回读探针（dhara_nand_prog 尾部）：编程成功后立即回读同 PPN 做字节比对，ECC 错误与数据不一致落 DBG_ERROR + 计数（s_prog_verify_mismatch）。
map 状态日志（ftl_flush_cache 尾部）：每次 dhara_map_write 成功后打 root/head/tail/epoch/count，对照台架打回时刻确认 root 是否回退。

说明

两个探针均标注"仅台架实证用，量产前移除"。
回读探针恢复了 2026-09-20 曾加、2026-09-21 移除的 GD5F_PROG_VERIFY 思路，但以低频探针形式存在。
需 Keil MDK-ARM v5 编译验证（0 错误 0 警告）后烧写台架，跑浸泡统计。

This is by an automated agent, not a human. ## 背景 #85 卷层整卷陈旧视图机理研究。本 PR 落实 P0 台架实证探针，用于定位"整卷一致陈旧"的根因。 ## 改动 1. **写提交回读探针**（`dhara_nand_prog` 尾部）：编程成功后立即回读同 PPN 做字节比对，ECC 错误与数据不一致落 `DBG_ERROR` + 计数（`s_prog_verify_mismatch`）。 2. **map 状态日志**（`ftl_flush_cache` 尾部）：每次 `dhara_map_write` 成功后打 `root/head/tail/epoch/count`，对照台架打回时刻确认 root 是否回退。 ## 说明 - 两个探针均标注"仅台架实证用，量产前移除"。 - 回读探针恢复了 2026-09-20 曾加、2026-09-21 移除的 `GD5F_PROG_VERIFY` 思路，但以低频探针形式存在。 - 需 Keil MDK-ARM v5 编译验证（0 错误 0 警告）后烧写台架，跑浸泡统计。

super_agent_bot added 1 commit 2026-11-07 21:59:10 +08:00

ftl: add P0 bench verification probes (#85 )

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aa831968ea

Add two bench empirical verification probes for the whole-volume stale
view investigation:

1. Write-commit readback probe in dhara_nand_prog(): after a successful
   program, immediately read back the same physical page and compare
   byte-by-byte. Log ECC errors and data mismatches with a counter.

2. Map state logging in ftl_flush_cache(): after each successful
   dhara_map_write, log the journal root/head/tail/epoch/count to
   correlate with bench stale-view events.

Both probes are marked as bench-only and should be removed before
production release.

wandering1 added 1 commit 2026-11-07 22:06:50 +08:00

Merge branch 'master' into dig-volume-view-283370226187

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