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Date: Wed, 7 May 2008 08:08:09 -0700 From: "Ray Lee" <ray-lk@...rabbit.org> To: "Matthew Wilcox" <matthew@....cx> Cc: "rae l" <crquan@...il.com>, linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: It's time to hack on dentry_stat? On Wed, May 7, 2008 at 7:51 AM, Matthew Wilcox <matthew@....cx> wrote: > On Wed, May 07, 2008 at 10:26:58PM +0800, rae l wrote: > > I have noticed that struct dentry_stat_t dentry_stat is a struct with > > six fields, > > but only 2 of them are used, other 4 have never been used since v2.6.11, > > > > from include/linux/dcache.h: > > > > struct dentry_stat_t { > > int nr_dentry; > > int nr_unused; > > int age_limit; /* age in seconds */ > > int want_pages; /* pages requested by system */ > > int dummy[2]; > > }; > > You have to not break: > > $ cat /proc/sys/fs/dentry-state > 122104 115846 45 0 0 0 One could hardcode the output of the last three (four?) fields, yes? Slightly grotty, but if it comes with a decent memory savings... -- 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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