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Date: Sat, 30 May 2009 10:04:54 -0700
Message-ID: <49bf44f10905301004v775f019ai8080a9b47776deb5@mail.gmail.com>
Subject: Re: [gentoo-user] Optimizations for SSD netbook
From: Grant <emailgrant@gmail.com>
To: gentoo-user@lists.gentoo.org
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>> >> 2. added elevator=3Dnoop as a boot parameter
>> >
>> > I remember that I've given this second advice. Since then I've read in
>> > the German computer journal c't [1] that CFQ has a detection for SSDs
>> > since 2.6.28 and now is the best choice for these devices.
>>
>> OK, do I need a boot parameter if I've set CFQ as the default IO
>> scheduler in the kernel config?
>
> No, that's what default switch is there for.
>
>
>> > Yup, the entry should read:
>> > tmp /tmp tmpfs default 0 0
>
> I'd also suggest to explicitly specify max size of tmpfs mount, since
> system locking because of wrong cp command is probably the last thing
> you want. Argument is "size=3D" (see man 8 mount).
>
>
>> Do you think mounting /tmp in RAM is worthwhile? =A0Mike doesn't seem to
>> think too highly of it.
>
> I guess accelerated fsync and reduced disk wear should be a nice plus
> for SSD device, provided the path in question is constanly used for
> writing which really might be the case with files, created in /tmp by
> various mktemp implementations (like python's) which I haven't really
> thought about, so I think I might be wrong about the issue here, sorry.
Thanks guys. I think the /tmp trick made a good difference. The last
thing I can think of is pruning the kernel way down. I think it's
mostly default.
- Grant