Messages in this thread | | | Date | Mon, 24 Dec 2012 16:36:37 +0800 | From | Zheng Liu <> | Subject | Re: [PATCH v2 2/3] mm: Update file times when inodes are written after mmaped writes |
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On Fri, Dec 21, 2012 at 01:28:27PM -0800, Andy Lutomirski wrote: > The onus is currently on filesystems to call file_update_time > somewhere in the page_mkwrite path. This is unfortunate for three > reasons: > > 1. page_mkwrite on a locked page should be fast. ext4, for example, > often sleeps while dirtying inodes. (This could be considered a > fixable problem with ext4, but this approach makes it > irrelevant.)
Hi Andy,
Out of curiosity, could you please share more detailed information about how to reproduce and measure this problem in ext4?
Thanks - Zheng
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