[update]: penguin labs update#2
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mm 藤补齐(双轨 handbook 线),mm 系列统一数字前缀按教学顺序: - 02-mm-slab: SLUB 唯一实现沿革、kmalloc vs 自建缓存 - 03-mm-vmalloc: 虚拟连续机制、TLB/DMA 代价、决策树 - 04-mm-page-reclaim: zone 三档水位线、kswapd、direct reclaim - 05-mm-oom: oom_badness 评分、oom_score_adj 免死金牌 - 01-mm-buddy: 由 mm-buddy 重命名(对齐前缀约定) 骨架从 ch08/ch09 笔记提炼,核心机制讲透,动手部分标 🔨 待 QEMU 亲测升 ✅。 build 验证: 552 md 扫描, 0 死链。
网络栈藤(收发数据通路主线)6 篇 🔨 整理中骨架: - 01-net-overview: 栈全景/收发漂流/net_device/NAPI - 02-net-sk-buff: sk_buff 四指针/push/pull/clone - 03-net-neighbor: ARP/NUD 状态机/ip_neigh_for_gw - 04-net-ipv4: ip_rcv 收发/分片/标志位口径 - 05-net-routing: FIB/fib_lookup/路由缓存演进 - 06-net-tcp: 三次握手/收发/定时器 笔记基于较早内核版本,经 workflow 起草 + 对照 6.19 源码 adversarial 审稿 (抓出 frag_off 8192 是 MF 非 DF、rmem 87KB→128KB、tcp_v4_hnd_req 已删、 dst_neigh_output 不存在等),再跑修正 workflow 逐条适配 6.19。 build 验证: 558 md, 0 死链。
调试与性能藤第一批 5 篇 🔨 整理中骨架,"读源码+讲解"模式(读 third_party/linux 源码讲机制,不只啃笔记): - 01-debug-printk: printk ring buffer lockless/prb/console_loglevel - 02-debug-kprobes: kprobe/kretprobe 断点注入/kprobe events - 03-debug-kasan: 影子内存 shadow/quarantine/三模式 - 04-debug-slub: slub_debug 红区(0xbb/0xcc)/Poison(0x5a/0x6b)/track - 05-debug-oops: Oops 解读/objdump 定位/栈回溯 经 workflow 起草 + 对照 6.19 源码 adversarial 审稿(抓出 slub 红区/Poison 值讲反、 kasan test_kasan 迁 kasan_test_c.c、oops ARM64 格式、kprobes fault_handler 已移除等), 再跑修正 workflow 逐条适配 6.19。build: 563 md, 0 死链。
…ng 藤 9 篇齐 调试藤第二批 4 篇 🔨 整理中骨架,"读源码+讲解"模式: - 06-debug-ftrace: 动态 patching(ftrace_init/replace_code)/trace events/ring buffer/trigger 两套 - 07-debug-kcsan: watchpoint/数据竞争/Advisory Lock(审稿 pass,0 修正) - 08-debug-panic: panic notifier/hung task/lockup 检测 - 09-debug-kgdb: gdbstub/debug_core/ARM64 BRK 链路 经 workflow 起草 + 对照 6.19 源码审稿(抓出 ftrace function tracer 概念混淆、 kgdb arch 链路/断点表数组名/字段、panic RCU stall 值+死链),修正 workflow 适配 6.19。 debugging 藤 9/17 节点齐。build: 567 md, 0 死链。
…rivers 藤 驱动藤第一批 5 篇 🔨 整理中骨架,"读源码+讲解"模式: - 01-drv-chardev: cdev/file_operations/chrdev_open/misc 设备 - 02-drv-ioctl: ioctl cmd 编码(_IO/_IOR/_IOW)/compat_ioctl - 03-drv-poll: poll_wait/wait_queue/wake_up - 04-drv-mmap: remap_pfn_range/VM_IO/GUP 拒绝 - 05-drv-irq: request_irq/request_threaded_irq/上下半部 经 workflow 起草 + 对照 6.19 源码审稿(抓出 def_chr_fops 两项、mmap GUP 位置 mm/gup.c check_vma_flags、wait-queue/ioctl 死链、sources 归因),修正 workflow 适配。 build: 572 md, 0 死链。
驱动藤第二批 4 篇 🔨 整理中骨架,"读源码+讲解"模式: - 06-drv-clk: 忙等/休眠/hrtimer/jiffies/fsleep - 07-drv-sync: mutex vs spinlock/irqsave/临界区(审稿 pass) - 08-drv-atomic: atomic_t/refcount_t/内存屏障 - 09-drv-rcu: RCU 宽限期/读者无锁(审稿 pass) 经 workflow 起草 + 对照 6.19 源码审稿(抓出 clk 死链 timers-howto→delay_sleep_functions、 atomic REFCOUNT_SATURATED=INT_MIN/2 事实错),修正 workflow 适配 clk/atomic。 drivers 藤 9 篇齐(chardev→rcu)。build: 576 md, 0 死链。
网络续 2 篇 🔨 整理中骨架,"读源码+讲解"模式: - 07-net-udp: udp_prot/udp_sendmsg(快路 ip_make_skb/慢路 cork)/udp_rcv 接收链 - 08-net-netfilter: 5 hooks/nf_hook_ops/conntrack/iptables/NAT netfilter 经对照 6.19 源码审稿(抓出 conntrack UDP 双向 180s→实际 120s、 xt_hook_link/ipv4_confirm 过时函数名),修正 workflow 适配。udp verify 首轮 因 429 失败,补审稿 + 手工修正 udp_csum/ip_send_skb 函数名。build: 578 md, 0 死链。
笔记 1:1 对齐第一批,扩展网络栈到 Netlink/ICMP/组播/IPv6(章级 1:1): - 09-net-netlink: AF_NETLINK/nlmsghdr/TLV/NETLINK_ROUTE/genetlink - 10-net-icmp: ICMPv4(icmp_rcv/icmp_send)/ICMPv6(NDISC/MLD) - 11-net-multicast: IGMP/ipmr MFC/组播转发/多路径 - 12-net-ipv6: IPv6 头部/SLAAC/NDISC/MLD 经对照 6.19 源码审稿(抓出 netlink 死链 genetlink→generic_netlink、multicast ipmr_queue_xmit→ipmr_queue_fwd_xmit、ipv6 CONFIG_IPV6_PRIVACY 不存在、icmp net_protocol 去 netns_ok),修正 workflow + 手工修。layer-1 扩展 4 新节点。 build: 582 md, 0 死链。
… 1:1 全覆盖 笔记 1:1 对齐第二批,扩展网络栈到 IPsec/无线/RDMA/命名空间: - 13-net-ipsec: XFRM 框架/SA/ESP/传输隧道模式/NAT-T - 14-net-wireless: cfg80211/mac80211/MLME/节电/802.11n - 15-net-rdma: RDMA/InfiniBand/QP/MR/READ-WRITE(审稿 pass) - 16-net-namespace: struct net/网络命名空间隔离/veth 经对照 6.19 源码审稿(抓出 wireless PASSIVE_SCAN→NO_IR 标志、namespace NETIF_F_NETNS_LOCAL 删除+br_device_event 编造+netns.html 死链),修正 workflow 适配。 networking 14 章笔记 1:1 全覆盖。build: 586 md, 0 死链。
site/site/.vitepress/cache/deps_temp_3106e562/ 是 VitePress 依赖缓存(build 产物), 因 .gitignore 只写 site/.vitepress/cache(单层)未覆盖 site/site/ 嵌套而误提交。 git rm --cached + 本地删 + .gitignore 补 site/site/。
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