Messages in this thread | | | From | Nikita Danilov <> | Date | Wed, 17 Nov 2004 21:20:37 +0300 | Subject | Re: [PATCH] [Request for inclusion] Filesystem in Userspace |
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Miklos Szeredi writes: > > > /sys/fs used to exist for for some. Moreover, /sys/fs/foofs/ was added > > automagically when foofs file system type was registered. But it was > > ultimately removed, because nobody took the time to fix all races > > between accessing /sys/fs/foofs/gadget and > > umount/filesystem-module-unloading. > > I don't see why this would be any harder for filesystem code than for > other types of drivers. Maybe someone can enlighten me. > > Anyway, I can try to clean it up: remove all the racy bits and keep > what I need (which is mainly just the /sys/fs directory). Where can I > find the most recent version of this?
It was removed at 2003.06.05, by "[fs] Remove kobject support for filesystems" change-set (mochel@osdl.org), you can extract patch from bitkeeper.
Reiser4 adds /sys/fs and /sys/fs/reiser4 manually (see kattr.[ch] in its sources), and uses
ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.9-rc4/2.6.9-rc4-mm1/broken-out/reiser4-kobject-umount-race.patch ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.9-rc4/2.6.9-rc4-mm1/broken-out/reiser4-kobject-umount-race-cleanup.patch
to avoid _some_ races (with umount), but these patches provide no protection against races with module unloading.
> > Thanks, > Miklos
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