Re: BUG FIX?: mm->rss is modified in some places without holding the page_table_lock

From: David S. Miller (davem@redhat.com)
Date: Fri Nov 03 2000 - 06:33:37 EST


   Date: Fri, 3 Nov 2000 06:39:22 -0500
   From: tytso@mit.edu

   Given that we don't have a 64-bit atomic_t type, what do people
   think of Davej's patch? (attached, below)

Broken, in 9 out of 10 places where he adds page_table_lock
acquisitions, this lock is already held --> instant deadlock.

This report is complicated by the fact that people were forgetting
that vmlist_*_{lock,unlock}(mm) was actually just spin_{lock,unlock}
on mm->page_table_lock. I fixed that already by removing the dumb
vmlist locking macros which were causing all of this confusion.

Later,
David S. Miller
davem@redhat.com
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
Please read the FAQ at http://www.tux.org/lkml/



This archive was generated by hypermail 2b29 : Tue Nov 07 2000 - 21:00:13 EST