> Um, trying to clarify: S390. Also known as zSeries, big iron machine, uses > its own weird processor design rather than x86, x86-64, arm, or mips > processors. Right. filemap_xip.c allows for an XIP filesystem. The only filesystem that is supported is ext2. Even that requires a block device driver thingy, which I don't understand, that's specific to the s390. > How does "struct page" enter into this? Don't sweat it, it has to do with the way filemap_xip.c works. > What I want to know is, are you saying execute in place doesn't work on things > like arm and mips? (I so, I was unaware of this. I heard about somebody > getting it to work on a Nintendo DS: > http://forums.maxconsole.net/showthread.php?t=18668 ) XIP works fine on things like arm and mips. However there is mixed support in the mainline kernel for it. For example, you can build an XiP kernel image for arm since like 2.6.10 or 12. Also MTD has an XiP aware mode that protects XiP objects in flash from get screwed up during programs and erases. But there is no mainlined solution for XiP of applications from the filesystem. However there have been patches for cramfs to do this for years. They are kind of messy and keep getting rejected. I do have a solution in the works for this part of it - http://axfs.sf.net. - To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
