Re: [openib-general] Re: [PATCH 35 of 53] ipath - some interrelatedstability and cleanliness fixes

From: Dave Olson
Date: Thu May 18 2006 - 03:03:56 EST

On Wed, 17 May 2006, Roland Dreier wrote:
| I do see obvious bugs in ipath_user_pages.c, though. In
| ipath_release_user_pages_on_close(), you have:
| mm = get_task_mm(current);
| if (!mm)
| goto bail;

It turns out that since this is called from ipath_close(),
mm will always be NULL, so what we do is leak memory, and
possibly leave some locked pages. I've been looking at this
code this evening; fixing it is clearly needed, but doesn't help
the long delays, hangs, and watchdogs, so far.

Dave Olson
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