Hi Shuoran, On Wed, Sep 26, 2018 at 12:40 PM 刘硕然 <liushuoran@xxxxxx> wrote: > I haven't tested the patch yet. But after reviewing the patch, I don't see anything related to BDI_CAP_STRICTLIMIT. So would you please explain a little bit more? Thanks. Bigger size of request reduces total number of requests and reduces overhead of per request operations. > PS: I did try increasing FUSE_MAX_PAGES_PER_REQ, but it seemed not helping in my scenario(writeback cache enabled, 4K writes, total write size is not very large). To utilize FUSE_MAX_PAGES_PER_REQ in kernel it is must to increase KERNEL_BUF_PAGES it libfuse too. I have libfuse patch with configurable max_pages. But 4K writes will not benefit from increase of request size, which now is 128K and proposed size is 1M. Thanks
