[Pvfs2-developers] Re: patch for client data corruption with 2.4 kernels

[Phil Carns]

Thanks Bart.  I applied the patches to cvs trunk.

-Phil

Bart Taylor wrote:
> I neglected the header file; attached is an additional patch to catch 
> it. Both of these patches should apply cleanly to head.
> 
> Bart.
> 
> 
> On Thu, Nov 20, 2008 at 1:54 PM, Bart Taylor <batayl at gmail.com 
> <mailto:batayl at gmail.com>> wrote:
> 
>     Hey guys,
> 
>     This patch fixes a client data corruption issue on Linux 2.4
>     systems. We worked with Phil off-list and determined that the
>     kernel's mapped buffers are not staying pinned in memory as they
>     should be. We were able to verify that under heavy swapping the
>     pvfs2-client-core memory was being moved, invalidating the pointers.
>     This fix uses mlock to hold the two buffers in place, and we were
>     able to verify that it fixes the swapping issue. There are compile
>     time flags to ensure it is only added for Linux 2.4 systems.
> 
>     Bart.
> 
> 
> 
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