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< Snip long thread about init segfaulting immediately at boot on 2.5.55 > ch@murgatroid.com said: > I just dropped jffs2 from 2.5.52 into 2.5.55 and it works, too. ch@murgatroid.com said: > Aha! This is the problem: > - .mmap = generic_file_mmap, > + .mmap = generic_file_readonly_mmap, > If you reverese this change, 2.5.55-rmk1 behaves. Er, yes. generic_file_readonly_mmap() silently removed the VM_MAYWRITE bit from vma->vm_flags when init made a _PRIVATE_ writable mapping, apparently on the basis that we have no writepage(). Then we return success anyway. Then init segfaults when it touches something in that mapping. /me blames akpm. :) -- dwmw2 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | |||||||||
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