On 06/02/2014 12:19 PM, Arnd Bergmann wrote:

On Monday 02 June 2014 13:52:19 Joseph S. Myers wrote:

quoted

On Fri, 30 May 2014, Arnd Bergmann wrote:

quoted

a) is this the right approach in general? The previous discussion
   pointed this way, but there may be other opinions.

The syscall changes seem like the sort of thing I'd expect, although 
patches adding new syscalls or otherwise affecting the kernel/userspace 
interface (as opposed to those relating to an individual filesystem) 
should go to linux-api as well as other relevant lists.

Ok. Sorry about missing linux-api, I confused it with linux-arch, which
may not be as relevant here, except for the one question whether we
actually want to have the new ABI on all 32-bit architectures or only
as an opt-in for those that expect to stay around for another 24 years.

Two more questions for you:

- are you (and others) happy with adding this type of stat syscall
  (fstatat64/fstat64) as opposed to the more generic xstat that has
  been discussed in the past and that never made it through the bike-
  shedding discussion?

- once we have enough buy-in from reviewers to merge this initial
  series, should we proceed to define rest of the syscall ABI
  (minus driver ioctls) so glibc and kernel can do the conversion
  on top of that, or should we better try to do things one syscall
  family at a time and actually get the kernel to handle them
  correctly internally?

The bit that is really going to hurt is every single ioctl that uses a
timespec.

Honestly, though, I really don't understand the point with "struct
inode_time".  It seems like the zeroeth-order thing is to change the
kernel internal version of struct timespec to have a 64-bit time... it
isn't just about inodes.  We then should be explicit about the external
uses of time, and use accessors.

	-hpa



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