Re: [Squashfs-devel] swap use

[Ming Z. <mi...@el...>]

thanks. i found and proposed another way for handling large file in
mksquashfs. this email was put into spam for unknown reason. :P

ming


On Wed, 2006-03-22 at 15:52 +0100, Christian Leber wrote:
> On Tue, Mar 21, 2006 at 01:30:00PM -0500, Ming Zhang wrote:
> > i could not find out how mksquashfs allocate memory, but looks like it
> > (or glibc) does not handle large size file efficiently.
> 
> It allocs it with malloc.
> 
> > i try to use mksquashfs to handle a single large size file like 40GB.
> > then it will do a huge mmap and then later the swap is under heavy use.
> 
> The glibc is using mmap to get memory.
> 
> 
> Actually it's a design decision, the easiest way would be to just use
> mmap for reading, so the kernel will (most likely) just handle it,
> no loops no nothing.
> 
> BUT obvisouly you would fail to use this for big files on 32 bit
> architectures.
> 
> 
> Christian Leber
>