Re: [RFC v2 0/8] add support for blocksize > PAGE_SIZE

[Luis Chamberlain]

On Fri, May 26, 2023 at 12:55:44AM -0700, Luis Chamberlain wrote:
> Future work:
> 
>   o shmem_file_read_iter()

And as for this, this is what I'm up to, but for the life of me I can't
figure out why I end up with an empty new line at the end of my test
with this, the same simple test as described in the patch "shmem: add
support to customize block size order".

I end up with:

root@iomap ~ # ./run.sh 
2dcc06b7ca3b7dd8b5626af83c1be3cb08ddc76c  /root/ordered.txt
a0466a798f2d967c143f0f716c344660dc360f78  /data-tmpfs/ordered.txt
  File: /data-tmpfs/ordered.txt
    Size: 6888896         Blocks: 16384      IO Block: 4194304 regular
    file
    Device: 0,44    Inode: 2           Links: 1
    Access: (0644/-rw-r--r--)  Uid: (    0/    root)   Gid: (    0/
    root)
    Access: 2023-05-26 01:06:15.566330524 -0700
    Modify: 2023-05-26 01:06:15.554330477 -0700
    Change: 2023-05-26 01:06:15.554330477 -0700
     Birth: 2023-05-26 01:06:15.534330399 -0700

root@iomap ~ # diff -u /root/ordered.txt /data-tmpfs/ordered.txt 
--- /root/ordered.txt   2023-05-25 16:50:53.755019418 -0700
+++ /data-tmpfs/ordered.txt     2023-05-26 01:06:15.554330477 -0700
@@ -999998,3 +999998,4 @@
 999998
 999999
 1000000
+
\ No newline at end of file

root@iomap ~ # cat run.sh 
#!/bin/bash

# time for i in $(seq 1 1000000); do echo $i >>
# /root/ordered.txt; done

sha1sum /root/ordered.txt
mount -t tmpfs            -o size=8M,border=22 -o noswap tmpfs
/data-tmpfs/
cp /root/ordered.txt /data-tmpfs/
sha1sum /data-tmpfs/ordered.txt
stat /data-tmpfs/ordered.txt