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On Fri, Jun 12, 2009 at 5:52 PM, Maxim Wexler<maxim.wexler@×××××.com> wrote: |
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> On 6/12/09, Mike Kazantsev <mk.fraggod@×××××.com> wrote: |
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>> On Fri, 12 Jun 2009 13:45:04 -0600 |
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>> Maxim Wexler <maxim.wexler@×××××.com> wrote: |
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>> |
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>>> #shm /dev/shm tmpfs nodev,nosuid,noexec 0 0 |
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>> |
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>> I wonder, what's the rationale behind commenting out shm? |
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>> |
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> |
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> Good question. I was given to understand the new line was intended to |
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> replaced the default, which I commented out. Perhaps that's a mistake. |
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> That's how I configured the previous iteration of genteee before it |
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> went south; maybe the new line had something to do with it. Should I |
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> use both? |
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> |
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> mw |
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|
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Hmm. |
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1) a tmpfs space is, by default, mounted on /dev/shm to meet some |
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standard somewhere (can't recall, FHS I think). The important thing to |
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note is that the name 'shm' is basically an unused placeholder (tmpfs |
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doesn't operate on an actual block device like /dev/hda1), and that |
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/dev/shm is the mount *point*. It should be there, and uncommented. |
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|
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2) Yes it's 'legal' to mount the lvm volume onto /tmp *and* tmpfs |
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space as you have your fstab lines there, but I can't say for sure |
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which would truly be mounted first and which second, and in turn which |
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would actually be used in the running system. IF you intend to use |
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your system RAM to reduce read/write on your drive for temporary |
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files, comment out the use of the LVM volume on /tmp and just leave |
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the tmpfs mount on that point active (commenting leaves you free to |
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change your mind anytime you like). |
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|
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3) Vaguely related to your mention of it 'taking its place' about the |
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/dev/shm and /tmp tmpfs mounts, the only time I've seen that mentioned |
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was in a conversation somewhere about 'why not just use a --bind mount |
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of /dev/shm onto /tmp to put it in tmpfs' ... which was answered with |
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the simple fact that, by default everywhere I've seen it, /dev/shm is |
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mounted noexec, while it's not altogether uncommon for things to be |
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decompressed into /tmp before execution (which would fail if /tmp were |
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mounted noexec). |
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|
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-- |
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Poison [BLX] |
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Joshua M. Murphy |
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"Without a struggle, there can be no progress." - Frederick Douglass |
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