On 2025-08-21, Askar Safin <safinaskar@xxxxxxxxxxxx> wrote: > ---- On Tue, 12 Aug 2025 22:25:40 +0400 Aleksa Sarai <cyphar@xxxxxxxxxx> wrote --- > > On 2025-08-09, Aleksa Sarai <cyphar@xxxxxxxxxx> wrote: > > > +Note that the Linux kernel reuses filesystem instances > > > +for many filesystems, > > > +so (depending on the filesystem being configured and parameters used) > > > +it is possible for the filesystem instance "created" by > > > +.B \%FSCONFIG_CMD_CREATE > > > +to, in fact, be a reference > > > +to an existing filesystem instance in the kernel. > > > +The kernel will attempt to merge the specified parameters > > > +of this filesystem configuration context > > > +with those of the filesystem instance being reused, > > > +but some parameters may be > > > +.IR "silently ignored" . > > > > While looking at this again, I realised this explanation is almost > > certainly incorrect in a few places (and was based on a misunderstanding > > of how sget_fc() works and how it interacts with vfs_get_tree()). > > > > I'll rewrite this in the next version. > > This recent patch seems to be relevant: > https://lore.kernel.org/all/20250816-debugfs-mount-opts-v3-1-d271dad57b5b@xxxxxxxxxx/ I'm aware of that, I was in one of the previous threads. There are some deeper consistency issues that I'm writing patches for at the moment. I'm of two minds whether I should fix the behaviour and then re-send man-pages with updated text (delaying the next round of man-page reviews by a month) or just reduce the specificity of this text and then add more details after it has been fixed. -- Aleksa Sarai Senior Software Engineer (Containers) SUSE Linux GmbH https://www.cyphar.com/
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