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Date: Tue, 8 Nov 2011 07:26:55 -0800 (PST) From: Pintu Agarwal <pintu_agarwal@...oo.com> To: "linux-mm@...ck.org" <linux-mm@...ck.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: HELP : Rss and Pss pages are always 0 for some drivers. Why? Dear All, I have a problem regarding RSS and PSS pages always showing zero for some PID. We are using customized kernel2.6.36 (arm with no swap). We are having a menu-screen application (current PID 1939) When I do cat /proc/1939/smaps we are getting "Rss", "Pss" page as always zero for some of the modules /dev/ump and /dev/mali. The output is as follows:- cat /proc/1936/smaps | grep -A 11 /dev/ump 43698000-43810000 rw-s 0000e000 00:11 6751 /dev/ump Size: 1504 kB Rss: 0 kB Pss: 0 kB Shared_Clean: 0 kB Shared_Dirty: 0 kB Private_Clean: 0 kB Private_Dirty: 0 kB Referenced: 0 kB Swap: 0 kB KernelPageSize: 4 kB MMUPageSize: 4 kB ---------------------------------------------------------------------- I wanted to understand why Rss and Pss pages information for only /dev/ump (similarly for /dev/mali) is not shown correctly by smaps. Where could be the problem and where I should debug? Any information on this will be a great help. Thanks, Regards, Pintu Kumar -- 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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