Messages in this thread | | | Date | Fri, 20 Oct 2023 10:30:36 -0700 | From | Andrew Morton <> | Subject | Re: [PATCH 0/5] avoid divide-by-zero due to max_nr_accesses overflow |
| |
On Fri, 20 Oct 2023 17:19:01 +0000 SeongJae Park <sj@kernel.org> wrote:
> On Thu, 19 Oct 2023 19:49:19 +0000 SeongJae Park <sj@kernel.org> wrote: > > > The maximum nr_accesses of given DAMON context can be calculated by > > dividing the aggregation interval by the sampling interval. Some logics > > in DAMON uses the maximum nr_accesses as a divisor. Hence, the value > > shouldn't be zero. Such case is avoided since DAMON avoids setting the > > agregation interval as samller than the sampling interval. However, > > since nr_accesses is unsigned int while the intervals are unsigned long, > > the maximum nr_accesses could be zero while casting. > > Actually, the issue was reported by Jakub, and I didn't add 'Reported-by:' tags > for him. I sure Andrew could add that on his own, but I want to minimize > Andrew's load, so will send v2 of this patchset. Andrew, please let me know if > that doesn't help but only increasing your load.
Editing the changelogs is far quicker than updating a patch series ;)
btw, it's now conventional to add a link to the reporter's report. The new "Closes:" tag, immediately after the Reported-by:. But it's not a big deal.
| |