我正在尝试调试定期导致我的工作机器瘫痪的问题。这是一个 OOM 类型的问题，基于 /proc/meminfo 输出：
Total: 32902608 kB
MemFree: 4054100 kB
Buffers: 72696 kB
Cached: 18126492 kB
SwapCached: 57124 kB
Active: 4351400 kB
Inactive: 17526856 kB
Active(anon): 3737244 kB
Inactive(anon): 17065796 kB
Active(file): 614156 kB
Inactive(file): 461060 kB
Unevictable: 64 kB
Mlocked: 64 kB
SwapTotal: 11717628 kB
SwapFree: 4202224 kB
Dirty: 680 kB
Writeback: 0 kB
AnonPages: 3622052 kB
Mapped: 457156 kB
Shmem: 17123968 kB
Slab: 4184848 kB
SReclaimable: 1822044 kB
SUnreclaim: 2362804 kB
KernelStack: 7032 kB
PageTables: 55828 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 28168932 kB
Committed_AS: 37689696 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 153644 kB
VmallocChunk: 34359467188 kB
HardwareCorrupted: 0 kB
AnonHugePages: 2105344 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 387924 kB
DirectMap2M: 33120256 kB
最突出的是 17GB 的Shmem使用量，至少据我所知。它增长不稳定，并且在某种程度上与 Chrome 的使用有关 - 似乎关闭选项卡会导致相当快的增长（可能约为 300MB/分钟）停止，但重新打开相同的选项卡似乎不会重新启动增长（不确定，需要首先抓住行为不当的标签）。
据我了解，shmem 包括 tmpfs 使用和 GEM 对象分配，但据我所知，使用率不是很高（大型pulse-shm-#### 文件，但总共只有 1GB）。
就证据而言，还有以下可疑片段dmesg：
[320918.676580] [TTM] Out of kernel memory
[320918.676587] [drm:radeon_gem_object_create] *ERROR* Failed to allocate GEM object (196608, 2, 4096, -12)
[320918.678451] [TTM] Out of kernel memory
[320918.678454] [drm:radeon_gem_object_create] *ERROR* Failed to allocate GEM object (4096, 2, 4096, -12)
[339871.343917] [drm:radeon_gem_object_create] *ERROR* Failed to allocate GEM object (393216, 2, 4096, -12)
[339873.207965] chrome[12513]: segfault at 10 ip 00007f48d1f385ea sp 00007ffc1bd73ab0 error 4 in chrome[7f48cfd7b000+5a2d000]
根据情况，我猜测它与 Chrome 有关，也许与某种图形内存泄漏有关（Radeon 驱动程序，Ubuntu 值得信赖），但从这里我迷失了如何调试（或至少一分为二，首先要弄清楚是否是 GEM 泄漏）。
编辑：忘了提及，但ipcs -m也看起来相当无聊：
------ Shared Memory Segments --------
key shmid owner perms bytes nattch status
0x0052e2c1 0 postgres 600 48 5
0x00000000 360449 htung 600 393216 2 dest
0x00000000 294914 htung 600 393216 2 dest
0x00000000 1114115 htung 600 524288 2 dest
0x00000000 655364 htung 600 524288 2 dest
0x00000000 2850821 htung 600 524288 2 dest
0x00000000 983046 htung 600 33554432 2 dest
0x00000000 1015815 htung 600 524288 2 dest
0x00000000 15663112 htung 600 393216 2 dest
0x00000000 15040521 htung 600 33554432 2 dest
0x00000000 1277962 htung 600 393216 2 dest
0x00000000 1507339 htung 600 1048576 2 dest
0x00000000 2752524 htung 700 153216 2 dest
0x00000000 1867789 htung 600 393216 2 dest
0x00000000 1638414 htung 600 393216 2 dest
0x00000000 2719759 htung 700 7680000 2 dest
0x00000000 2293776 htung 700 7680000 2 dest
0x00000000 1966097 htung 600 1048576 2 dest
0x00000000 2326546 htung 700 7680000 2 dest
0x00000000 2359315 htung 700 7680000 2 dest
0x00000000 2392084 htung 700 7680000 2 dest
0x00000000 2555925 htung 700 220576 2 dest
0x00000000 2588694 htung 700 40848 2 dest
0x00000000 2621463 htung 700 40848 2 dest
0x00000000 2654232 htung 700 40848 2 dest
0x00000000 2687001 htung 700 7680000 2 dest
0x00000000 15826970 htung 600 524288 2 dest
0x00000000 3735579 htung 600 393216 2 dest
0x00000000 3506205 htung 600 393216 2 dest
0x00000000 3932190 htung 600 393216 2 dest
0x00000000 15106079 htung 600 131664 2 dest
0x00000000 3866656 htung 600 1048576 2 dest
0x00000000 3899425 htung 600 393216 2 dest
0x00000000 4030498 htung 600 524288 2 dest
0x00000000 4063267 htung 600 393216 2 dest
0x00000000 8978468 htung 600 1048576 2 dest
0x00000000 6094885 htung 600 393216 2 dest
0x00000000 35651622 htung 600 4011000 2 dest
0x00000000 6127657 htung 600 393216 2 dest
0x00000000 6488106 htung 600 7206400 2 dest