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

David S. Miller
2000-11-03T11:49:04Z

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