Re: [PATCH] mm: swap: Avoid infinite loop if no valid swap entry found during do_swap_page

[Matthew Wilcox]

On Mon, Feb 24, 2025 at 09:27:38AM +0800, mawupeng wrote:
> On 2025/2/23 14:18, Barry Song wrote:
> > On Sun, Feb 23, 2025 at 3:42 PM Matthew Wilcox <willy@xxxxxxxxxxxxx> wrote:
> >> On Sat, Feb 22, 2025 at 11:59:53AM +0800, mawupeng wrote:
> >>> On 2025/2/22 11:45, Matthew Wilcox wrote:
> >>>> On Sat, Feb 22, 2025 at 10:46:17AM +0800, Wupeng Ma wrote:
> >>>>> Digging into the source, we found that the swap entry is invalid due to
> >>>>> unknown reason, and this lead to invalid swap_info_struct. Excessive log
> >>>>> printing can fill up the prioritized log space, leading to the purging of
> >>>>> originally valid logs and hindering problem troubleshooting. To make this
> >>>>> more robust, kill this task.
> 
> Yes, log flooding is not the main issue here, endless #PF is rather a more serious
> problem.

Then don't write the report as if the log flooding is the real problem.