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| Started by | Oleg Nesterov <oleg@redhat.com> |
|---|---|
| First post | 2015-06-30 03:40 +0200 |
| Last post | 2015-06-30 03:40 +0200 |
| Articles | 1 — 1 participant |
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[PATCH 0/5] stop_machine: cleanups and fix Oleg Nesterov <oleg@redhat.com> - 2015-06-30 03:40 +0200
| From | Oleg Nesterov <oleg@redhat.com> |
|---|---|
| Date | 2015-06-30 03:40 +0200 |
| Subject | [PATCH 0/5] stop_machine: cleanups and fix |
| Message-ID | <pGSGK-3PE-3@gated-at.bofh.it> |
On 06/30, Oleg Nesterov wrote: > > But let me send some cleanups first. Plus I believe I found another > stop_machine bug, see the last patch. So I hope these changes make > sense in any case. The last patch fixes the bug, I think. Say, stop_one_cpu(X) can race with _cpu_down(X)->stop_machine() so that the kernel will crash if this CPU X becomes online again. The window after cpu_stopper_thread() returns and before smpboot_thread() calls ->park() is tiny, but still this is possible afaics. Oleg. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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