On Wed, 11 Apr 2001, Justin Mason wrote:
> But then you have to hope the OS doesn't have any wierd ramdisk bugs,
> which may not be the case for odd mmap()-type cases esp. with 2.4.x,
> AFAICS from reading Kernel Traffic...
bugs or 'not supported with this device' not withstanding of course..
however, /IIRC/, if a blockdevice works then almost certainly mmap
should work on it.
> The mmap() case is most likely optimised for real disks, not ramdisks, and
> ramdisks ('cos they chew up real RAM) can have bad effects on caching.
the traditional ramdisk doesn't share memory with the kernel. ie the
memory is reserved and not used by the kernel.
ramfs is different and might have odd problems (no idea about mmap()
but there's weirdities that come up every now and then on l-k), but it
isn't a blockdevice...
> BTW those Ratpoison people scare me, with their "rat" hatred. eek.
hmm... must check out that link.
> --j.
>
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