Re: [Gluster-devel] swapcontest usage in syncio.c

[Anand Avati]

On Wed, Aug 8, 2012 at 10:13 PM, Emmanuel Dreyfus <address@hidden> wrote:

Anand Avati <address@hidden> wrote:

> I still don't understand how/why this change will help NetBSD

It ensures swapcontext() is operates on a context obtanined by
getcontext() in the same thread.

NetBSD considers the thread to be part of the context, and calling
swapcontext() with a context obtained from another thread will preempt
the other thread in order to execute synctask_wrap(). And here we break
because synctask_get() will not retreive the approriate task, as it was
set in thread specific storage of another thread.

I wonder how this will impact multi-thread syncproc. You might want to #define SYNCENV_PROC_MAX to 1?

Avati