On Tue, 24 Apr 2007 21:24:28 +0200 Tim Dijkstra <[EMAIL PROTECTED]> wrote:
> On Mon, 23 Apr 2007 23:34:58 +0200 > "Rafael J. Wysocki" <[EMAIL PROTECTED]> wrote: > > > On Monday, 23 April 2007 21:30, Tim Dijkstra wrote: > > > On Sun, 22 Apr 2007 23:22:30 +0200 > > > "Rafael J. Wysocki" <[EMAIL PROTECTED]> wrote: > > > > > > > On Sunday, 22 April 2007 22:06, Tim Dijkstra wrote: > > > > > On Sun, 22 Apr 2007 21:18:46 +0200 > > > > > "Rafael J. Wysocki" <[EMAIL PROTECTED]> wrote: > > > > > > > > > > > > > > > > > I think we have to debug the swap-file-on-LVM case more thoroughly. > > > > > > > > > > OK, I've tried printing out /dev/resume_device + offset in mark_swap. > > > > > Does the following seem reasonable? > > > > > > > > > > > > > > > char ff[100]; > > > > > lseek(fd, shift, SEEK_SET); > > > > > read(fd,ff,80); > > > > > printf("The header (shift %u): %80s\n", shift, ff); > > > > > > > > Yes, it does. > > > > > > > > > It prints nothing ... > > > > > > > > I thought it would. > > > > > > > > Still, swap-offset doesn't fail, so it evidently is able to find the > > > > swap > > > > signature in your file. > > > > > > > Can you hack swap-offset.c so that it prints stat.st_rdev after calling > > > > fstat() > > > > and run it on your swap file, then hack suspend.c so that it prints > > > > blkdev > > > > in set_swap_file() and compare these two things? > > > > > > stat.st_rdev == 0, but I think that's logical, because the swap _file_ is > > > not a > > > device file. > > > stat.st_dev == 64773 > > > > > > Which is also the value of blkdev in suspend. > > > > And which is strange, because s2disk uses stat.st_rdev . > > > > Something fishy is going on here ... I'm looking a bit closer into writing the image. I'm a bit confused. In the case of a swap file we also need the offset. Indeed the function set_swap_file uses that information. BTW the ioctl seem a bit counterintuitive you set a swap-file with ioctl(dev, SNAPSHOT_SET_SWAP_AREA, &swap); and a swap partition with ioctl(dev, SNAPSHOT_SET_SWAP_FILE, blkdev); But then that information is not used in init_swap_writer. The only thing we pass to that function is a file-descriptor pointing to the device that contains the swap-file... grts Tim
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