Geert Stappers wrote: > On Thu, Aug 25, 2005 at 02:24:29PM +0200, Thiemo Seufer wrote: > > Frans Pop wrote: > > > On Thursday 25 August 2005 10:29, Geert Stappers wrote: > > > > > -append="cdrom ramdisk_size=16384 devfs=mount rw" > > > > > -initrd=/boot/initrd.gz > > > > > +append="cdrom ramdisk_size=18000 devfs=mount rw" > > > > > > > > I would expect 17408 or 18432, because they are Mib boundaries > > > > > > Do you have some documentation for that? > > http://lxr.linux.no/source/Documentation/ramdisk.txt#L42 > speaks about 'k' and a default of 4096 > > > > Nothing seems to break if you use other values. > > > What is the benefit of using Mib values? > > > > Any multiple of PAGE_SIZE is ok. > > AFAIK MMUs is a memory page a power of two. ( 2, 4, 8, 16 , 32 ) > with Mib values ( 1024 is 2^10 ) are we allways save. It is 4k for most architectures, 8k for alpha, and 4k-64k for mips. I _think_ the ramdisk code aligns automatically to the next upper or lower page border (at least it should do so), which means any value is safe. Multiples of PAGE_SIZE is what the ramdisk code internally expects. Thieom
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