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| author | Peter Zijlstra <peterz@infradead.org> | 2020-03-04 11:28:31 +0100 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2020-03-06 11:06:15 +0100 |
| commit | 8019ad13ef7f64be44d4f892af9c840179009254 (patch) | |
| tree | 889b754b07fa844410d6782bc1b4473007a9bc99 /%3fh%3dv2.6.23-rc2&id%3d8d67743653dce5a0e7aa500fcccb237cde7ad88e?h=v2.6.23-rc2&id=8019ad13ef7f64be44d4f892af9c840179009254 | |
| parent | 98d54f81e36ba3bf92172791eba5ca5bd813989b (diff) | |
futex: Fix inode life-time issue
As reported by Jann, ihold() does not in fact guarantee inode
persistence. And instead of making it so, replace the usage of inode
pointers with a per boot, machine wide, unique inode identifier.
This sequence number is global, but shared (file backed) futexes are
rare enough that this should not become a performance issue.
Reported-by: Jann Horn <jannh@google.com>
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Diffstat (limited to '%3fh%3dv2.6.23-rc2&id%3d8d67743653dce5a0e7aa500fcccb237cde7ad88e?h=v2.6.23-rc2&id=8019ad13ef7f64be44d4f892af9c840179009254')
0 files changed, 0 insertions, 0 deletions