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    SubjectRe: [PATCH v8 00/22] Support ext4 on NV-DIMMs
    On Tue, Jul 22, 2014 at 03:47:48PM -0400, Matthew Wilcox wrote:
    > One of the primary uses for NV-DIMMs is to expose them as a block device
    > and use a filesystem to store files on the NV-DIMM. While that works,
    > it currently wastes memory and CPU time buffering the files in the page
    > cache. We have support in ext2 for bypassing the page cache, but it
    > has some races which are unfixable in the current design. This series
    > of patches rewrite the underlying support, and add support for direct
    > access to ext4.

    Matthew, as discussed before, your patchset make exessive use of
    i_mmap_mutex. Are you going to address this later? Or what's the plan?

    --
    Kirill A. Shutemov


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