Andrew Morton wrote:
On Fri, 20 Apr 2007 22:13:41 +0530
Balbir Singh <[email protected]> wrote:
We broke the the alignment of members of taskstats to the 8 byte boundary
with the CSA patches. In the current kernel, the taskstats structure is
not suitable for use by 32 bit applications in a 64 bit kernel.
ugh, that was bad of us.
Yes :-)
...
The patch adds an __attribute__((aligned(8))) to the
taskstats structure members so that 32 bit applications using taskstats
can work with a 64 bit kernel.
But there might be 32-bit applications out there which are using the
present wrong structure?
otoh, I assume that those applications would be using taskstats.h and would
hence encounter this bug and we would have heard about it, is that correct?
Yes, correct.
otoh^2, 32-bit applications running under 32-bit kernels will presently be
functioning correctly, and your change will require that those applications
be recompiled, I think?
Yes, correct. They would be broken with this fix. We could bump up the
version TASKSTATS_VERSION to 4. Would you like a new patch the version
bumped up?
This patch looks like 2.6.20 and 2.6.21 material, but very carefully...
Yes, 2.6.20 and 2.6.21 sound correct.
--
Warm Regards,
Balbir Singh
Linux Technology Center
IBM, ISTL
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