Messages in this thread | | | Date | Wed, 21 Nov 2001 10:13:52 -0200 (BRST) | From | Rik van Riel <> | Subject | Re: 2.4.14 + Bug in swap_out. |
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On 20 Nov 2001, Eric W. Biederman wrote:
> /* Make sure the mm doesn't disappear when we drop the lock.. */ > atomic_inc(&mm->mm_users); > spin_unlock(&mmlist_lock); > > nr_pages = swap_out_mm(mm, nr_pages, &counter, classzone); > > mmput(mm); > > > And looking in fork.c mmput under with right circumstances becomes. > kmem_cache_free(mm_cachep, (mm))) > > So it appears that there is nothing that keeps the mm_struct that > swap_mm points to as being valid.
The atomic_inc(&mm->mm_users) above should make sure this mm_struct stays valid.
regards,
Rik -- Shortwave goes a long way: irc.starchat.net #swl
http://www.surriel.com/ http://distro.conectiva.com/
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