Re: [developer] 16675 want syncfs(3C)

[Robert Mustacchi <rm@fingolfin.org>]

On 7/26/24 18:33, Gordon Ross wrote:
> I read through your write-up in the issue.
> Have you surveyed which file system types on Linux support syncfs(2)?
> I'm curious what they might have done for NFS and SMB, which don't
> really offer a natural way to sync everything under a mount point.

I didn't survey it too extensively. The structure of the VFS between the
systems is a bit different. In our case the VFS_SYNC and VFS_SYNCFS
entry point expects the file system to determine dirty vnodes, schedule
writes, and related. While not all file systems implement the specific
sync_fs() entry point, other logic is called around there that does
something for all file systems, the specifics I couldn't say. NFS and
SMB don't implement the sync_fs() file system specific vector over there.

Robert

> On Thu, Jul 25, 2024 at 8:09 PM Robert Mustacchi <rm@fingolfin.org> wrote:
>>
>> On 7/25/24 17:03, Richard Lowe wrote:
>>> I think this was meant to be https://code.illumos.org/c/illumos-gate/+/3609
>>
>> Oops, it was. Thanks for catching that.
>>
>> Robert
>>
> 
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