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Message-ID: <877idysbs3.fsf@basil.nowhere.org> Date: Tue, 13 May 2008 13:07:08 +0200 From: Andi Kleen <andi@...stfloor.org> To: "Yakov Lerner" <iler.ml@...il.com> Cc: "Kernel Linux" <linux-kernel@...r.kernel.org> Subject: Re: calculate actual state of caches wrt set of files/dirs, without modifying caches ? "Yakov Lerner" <iler.ml@...il.com> writes: > Is it possible to calculate the following thing from userspace: > Some benchmarking program has list of filenames and dirnames. > Can it calculate how many of inodes and data blocks of those items are *cached* > vs how many are not, without modifying existing > status of inode caches & buffer caches ? For inodes/dentries it is not possible AFAIK (short of taking a kernel crash dump and walking the data structures), but for file data you can mmap the file without accessing it and then check with mincore() for each page. -Andi -- 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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