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    SubjectRe: [PATCH] SMP race in ext2 - metadata corruption.
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    Linus Torvalds wrote:
    >
    > On Thu, 3 May 2001, Alan Cox wrote:
    > > Ditto for some CD based stuff. You burn the important binaries to the front
    > > of the CD, then at boot dd 64Mb to /dev/null to prime the libraries and
    > > avoid a lot of seeking during boot up from the CD-ROM.
    > >
    > > However I could do that from an initrd before mounting
    >
    > Ehh. Doing that would be extremely stupid, and would slow down your boot
    > and nothing more.

    Ehhh, Linus, Linearly reading my harddisk goes at 26Mb per second. By
    analyzing my boot process I determine that 50M of my disk is used
    during boot. I can then reshuffle my disk to have that 50M of data at
    the beginning and reading all that into 50M of cache, I can save
    thousands of 10ms seeks. Boot time would go from several tens of
    seconds to 2 seconds worth of DISK IO plus several seconds of pure CPU
    time.

    This doesn't work if I don't have the memory to cache 50M of
    disk-blocks.

    Is this simply: Don't try this then?

    Roger.


    --
    ** R.E.Wolff@BitWizard.nl ** http://www.BitWizard.nl/ ** +31-15-2137555 **
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