Re: Issues with new NTFS module

lacsaP Patatetom <patatetom@xxxxxxxxx> · Fri, 17 Nov 2023 08:40:18 +0100

Le ven. 17 nov. 2023 à 07:41, Giovanni Santini <giovannisantini93@xxxxxxxx> a écrit :

    Hi Marius,

    On 2023-11-15 14:16, Marius Kittler
      wrote:

      Since both are completely different implementations the syncing behavior might 
differ. I haven't paid much attention to the syncing behavior of the new kernel 
module but it might simply be more lazy than the FUSE implementation. Does it 
help to invoke `sync` manually? If yes, this may also be a workaround in case 
you really want it to write the data without delay.

    I did try, yes. No fortune with manual sync and udisks or mount.
    Here is a shell session, I think a pastebin is not needed given
      that it is short:
    ---
    (23:16)
          giovanni @ ~ $ udisksctl mount -b /dev/nvme0n1p5 -t ntfs3

        Mounted /dev/nvme0n1p5 at /run/media/giovanni/Data

        (23:16) giovanni @ ~ $ touch
        /run/media/giovanni/Data/ntfs_error.txt

        (23:17) giovanni @ ~ $ ls -al
        /run/media/giovanni/Data/ntfs_error.txt

        -rw-r--r-- 1 giovanni users 0 Nov 16 23:17
        /run/media/giovanni/Data/ntfs_error.txt

        (23:17) giovanni @ ~ $ echo "Using ntfs3" >
        /run/media/giovanni/Data/ntfs_error.txt

        (23:17) giovanni @ ~ $ cat
        /run/media/giovanni/Data/ntfs_error.txt

        (23:17) giovanni @ ~ $ udisksctl unmount -b /dev/nvme0n1p5

        Unmounted /dev/nvme0n1p5.

        (23:17) giovanni @ ~ $ udisksctl mount -b /dev/nvme0n1p5 -t
        ntfs3

        Mounted /dev/nvme0n1p5 at /run/media/giovanni/Data

        (23:17) giovanni @ ~ $ cat
        /run/media/giovanni/Data/ntfs_error.txt

        Using ntfs3

        (23:17) giovanni @ ~ $ udisksctl unmount -b /dev/nvme0n1p5

        Unmounted /dev/nvme0n1p5.

        (23:18) giovanni @ ~ $ sudo mount -t ntfs3 -o
        uid=$UID,gid=$GROUPS /dev/nvme0n1p5 /mnt/

        (23:18) giovanni @ ~ $ cat /mnt/ntfs_error.txt  

        Using ntfs3

        (23:18) giovanni @ ~ $ echo "Using ntfs3 and mount" >
        /mnt/ntfs_error.txt  

        (23:19) giovanni @ ~ $ cat /mnt/ntfs_error.txt  

        (23:19) giovanni @ ~ $ sync

        (23:19) giovanni @ ~ $ cat /mnt/ntfs_error.txt  

        (23:19) giovanni @ ~ $ sync

        (23:19) giovanni @ ~ $ cat /mnt/ntfs_error.txt  

        (23:19) giovanni @ ~ $ sudo umount /mnt  

        (23:19) giovanni @ ~ $ sudo mount -t ntfs3 -o
        uid=$UID,gid=$GROUPS /dev/nvme0n1p5 /mnt/

        (23:19) giovanni @ ~ $ cat /mnt/ntfs_error.txt  

        Using ntfs3 and mount

        (23:19) giovanni @ ~ $ 

      ---

    You can see that when I try to overwrite the file content it just
      "appears" empty.
    Unmounting and remounting the partition makes the content appear.
    Bests,

    -- 
Giovanni Santini

on the `/proc/sys/vm/` side may be ?
does the `sync` followed by a `sysctl -q vm.drop_caches=3` change things ?

regards, lacsaP.