wall-2 session-87: window page-list hunt - the 2 GiB cycle's windows are scattered (later offsets at first_PA+off are zeros); the memdesc {size 0x20000, PA=0x107c47000, kptrs} page list is only reachable via the kernel pointers (kcore walk with fresh addresses needed); content search for the init-stream prefix found the window pages (0x103c06000+0x858, 0x11dbfa000+0x858, 0x126d69000+0x59c) but the VA<->page relation is non-linear; the client blocks in os_schedule at the allocation (the unread later pushes suspected)

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