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

David S. Miller
2000-11-03T15:06:16Z

Date: Fri, 3 Nov 2000 09:56:15 -0500
From: "Theodore Y. Ts'o" <tytso@MIT.EDU>

Are you saying that the original bug report may not actually be a
problem? Is ms->rss actually protected in _all_ of the right
places, but people got confused because of the syntactic sugar?

I don't know if all of them are ok, most are.

Someone would need to do the analysis. David's patch could be used as
a good starting point. A quick glance at mm/memory.c shows these
spots need to be fixed:

1) End of zap_page_range()
2) Middle of do_swap_page
3) do_anonymous_page
4) do_no_page

Later,
David S. Miller
davem@redhat.com