Re: [PATCH v5 07/11] fs/ceph: remove i_truncate_mutex, use i_fragtree_mutex for both

[Max Kellermann]

On Mon, Nov 2, 2026 at 6:35 PM Ilya Dryomov <idryomov@xxxxxxxxx> wrote:
> Only 8 bytes?  struct mutex has got to be at least two if not three
> times larger than that.

You're right, it's 32 bytes indeed.

This simple patch set saves ~ 3 GB RAM on each of our servers. Much
more memory savings would be possible with some effort.

-- 
Max Kellermann
Principal Architect
Hosting Technology

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