Debian dmesg日志中的内存信息解读

时间2025-10-01 22:29:03发布访客分类主机资讯浏览494

导读：在Debian系统中，dmesg命令用于显示内核环缓冲区的消息，这些消息包括硬件状态、驱动程序加载信息以及系统启动过程中的各种事件。内存相关的信息是其中非常重要的一部分，可以帮助你了解系统的内存使用情况和潜在问题。以下是一些常见的dmes...

在Debian系统中，dmesg命令用于显示内核环缓冲区的消息，这些消息包括硬件状态、驱动程序加载信息以及系统启动过程中的各种事件。内存相关的信息是其中非常重要的一部分，可以帮助你了解系统的内存使用情况和潜在问题。

以下是一些常见的dmesg日志中与内存相关的信息及其解读：

内存总量和类型：
```
Memory: 8177M/16352M available (8192M kernel code, 1310M rwdata, 4096M rodata, 2048M init, 1943M bss, 32768M reserved, 0K cma-reserved)
```
- Memory: 8177M/16352M available：系统总共有16352MB内存，当前可用8177MB。
- 8192M kernel code：内核代码占用的内存。
- 1310M rwdata：可读写数据占用的内存。
- 4096M rodata：只读数据占用的内存。
- 2048M init：初始化内存。
- 1943M bss：未初始化数据占用的内存。
- 32768M reserved：保留内存。
- 0K cma-reserved：连续内存分配器（CMA）保留的内存。

内存分配失败：

[    0.000000] Memory: 8177M/16352M available (8192M kernel code, 1310M rwdata, 4096M rodata, 2048M init, 1943M bss, 32768M reserved, 0K cma-reserved)
[    0.000000] SLUB: HWalign=64, Size=1.00MB, MinObjects=16, CPUs=8, Nodes=1
[    0.000000] Hierarchical RCU implementation.
[    0.000000] NR_IRQS:16384, nr_irqs:16384, preallocated irqs:16384
[    0.000000] rcu: Hierarchical SRCU implementation.
[    0.000000] Clocksource systick: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 764504378 ns
[    0.000000] NET: Registered protocol family 2
[    0.000000] tcp_listen_portaddr_hash hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] TCP established hash table entries: 32768 (order: 6, 262144 bytes)
[    0.000000] TCP bind hash table entries: 32768 (order: 6, 262144 bytes)
[    0.000000] TCP: Hash tables configured (established 32768 bind 32768)
[    0.000000] MPTCP hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP subflow hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP B-PDU buffer hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP RTO buffer hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP socket hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP key hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[    0.000000] MPTCP control block array hash table entries: 8192 (order: 4, 65536 bytes)
[

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