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Date: Mon, 17 Nov 2008 16:09:32 +0200 From: "Victoria Muntean" <vikimun@...il.com> To: "Hugh Dickins" <hugh@...itas.com> Cc: "Kernel Linux" <linux-kernel@...r.kernel.org> Subject: Re: size of swapped-out part of the process On Mon, Nov 17, 2008 at 4:02 PM, Hugh Dickins <hugh@...itas.com> wrote: > On Mon, 17 Nov 2008, Victoria Muntean wrote: >> How can I calculate size of swapped-out part of the process from >> /proc/PID/*, even if approximately ? >> For example, I have VmSize=1216192 kB, VmRSS = 628788 kB, but global >> swap-in-use==0. >> Hence (VmSize - VmRSS) is far from being swapped-out part of the >> process. What is ? > > I'm sorry, we don't record those numbers per process or per mm, > so you won't find them in /proc/PID/status or /proc/PID/statm. > > And we'd probably resist accepting a patch to add them, > so as not to enlarge key data structures to hold them. > > There's also an ambiguity about what "swapped-out" means: does > it include shared file pages which were once mapped into the > process, but have since been freed under memory pressure? > > But it looks like you're interested in swapped-out to mean written > on swap. In that case, if you have CONFIG_PROC_PAGE_MONITOR=y, > you can read /proc/PID/smaps and add up all the "Swap:" lines. ok thanks > But don't keep reading it in a tight loop: that would > tend to detract from the performance of your system. -- 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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