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There are regions in the ZFS code where it is desirable to be able
to be set PF_FSTRANS while a specific mutex is held. The ZFS code
could be updated to set/clear this flag in all the correct places,
but this is undesirable for a few reasons.
1) It would require changes to a significant amount of the ZFS
code. This would complicate applying patches from upstream.
2) It would be easy to accidentally miss a critical region in
the initial patch or to have an future change introduce a
new one.
Both of these concerns can be addressed by adding a new mutex type
which is responsible for managing PF_FSTRANS, support for which was
added to the SPL in commit
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| .. | ||
| Makefile.in | ||
| splat-atomic.c | ||
| splat-condvar.c | ||
| splat-cred.c | ||
| splat-ctl.c | ||
| splat-generic.c | ||
| splat-internal.h | ||
| splat-kmem.c | ||
| splat-kobj.c | ||
| splat-linux.c | ||
| splat-list.c | ||
| splat-mutex.c | ||
| splat-random.c | ||
| splat-rwlock.c | ||
| splat-taskq.c | ||
| splat-thread.c | ||
| splat-time.c | ||
| splat-vnode.c | ||
| splat-zlib.c | ||