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Date: Thu, 13 May 2010 15:34:04 -0600 From: "Chris Friesen" <cfriesen@...tel.com> To: linux-kernel@...r.kernel.org, linux-mm@...ck.org Subject: /proc/<pid>/maps question....why aren't adjacent memory chunks merged? Hi, I've got a system running a somewhat-modified 2.6.27 on 64-bit x86. While investigating a userspace memory leak issue I noticed that /proc/<pid>/maps showed a bunch of adjacent anonymous memory chunks with identical permissions: 7fd048000000-7fd04c000000 rw-p 00000000 00:00 0 7fd04c000000-7fd050000000 rw-p 00000000 00:00 0 7fd050000000-7fd054000000 rw-p 00000000 00:00 0 7fd054000000-7fd058000000 rw-p 00000000 00:00 0 7fd058000000-7fd05c000000 rw-p 00000000 00:00 0 7fd05c000000-7fd060000000 rw-p 00000000 00:00 0 7fd060000000-7fd064000000 rw-p 00000000 00:00 0 7fd064000000-7fd068000000 rw-p 00000000 00:00 0 7fd068000000-7fd06c000000 rw-p 00000000 00:00 0 7fd06c000000-7fd070000000 rw-p 00000000 00:00 0 7fd070000000-7fd074000000 rw-p 00000000 00:00 0 7fd074000000-7fd078000000 rw-p 00000000 00:00 0 7fd078000000-7fd07c000000 rw-p 00000000 00:00 0 7fd07c000000-7fd07fffe000 rw-p 00000000 00:00 0 I was under the impression that the kernel would merge areas together in this circumstance. Does anyone have an idea about what's going on here? Thanks, Chris -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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