Kernelの4.2〜4.5あたりで，SSDのサポートについてずいぶん改良が行われているそうです．<\/p>\n
一部のSSDはTRIM機能をONにすることで，修復不能なデータ破壊をする危険性があるそうです．そこら辺の取り組みがなされたようです．<\/p>\n
Kernel 4.1.xから4.2にしたところ，SSDのアクセスが目だって遅くなったので，ちょうど4.1.xがlong termになったこともあって4.1.xにしばらくとどまっていました．<\/p>\n
しかし，SSDサポートが改良される前の4.1.xにとどまるのは不安もあります．そこで，4.4.xにしていました．4.2のときの遅さはそのままでした．<\/p>\n
4.5にしてみたところ，改善はしたようです．4.1.xの頃のSSD的な速さはまだ感じられていません．<\/p>\n
4.5にすぐしなかったのは，nVidiaのドライバー，NVIDIA-Linux-x86-364.12にすると，Xが起動しなかったためです．NVIDIA-Linux-x86-361.xxシリーズは4.5に対応してないだろうと勝手に思い込んでいました．<\/p>\n
しかし，4.4.6の下でのSSDの遅さは異常です．そこで，ダメ元と思って，NVIDIA-Linux-x86-361.xxの最新版，NVIDIA-Linux-x86-361.42を試したところ，Kernel 4.5.0でOKでした．<\/p>\n","protected":false},"excerpt":{"rendered":"
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