Messages in this thread | | | Date | Thu, 16 Aug 2007 20:45:44 -0400 | From | Dave Jones <> | Subject | Re: [PATCH 00/23] per device dirty throttling -v8 |
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On Sun, Aug 05, 2007 at 11:00:29AM -0400, Theodore Tso wrote:
> P.S. Yet alternative is to specify noatime on an individual > file/directory basis. We've had this capability for a *long* time, > and if a distro were to set noatime for all files in certain > hierarchies (i.e., /usr/include) and certain top-level directories > (since the chattr +A flag is inherited)
This came across my mind again earlier, and I went digging. Can you explain how this works?
I've eyeballed the ext2/ext3 code, and feel like I'm missing something obvious. I'm guessing that for eg, with /usr/include/stdio.h, we check the inodes for all four parts of path, and if any of them are +A we avoid the atime update ? If so, where does that inheritance happen in the code?
Dave
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