Messages in this thread | | | Date | Sat, 7 Mar 2020 17:58:02 -0800 | From | Matthew Wilcox <> | Subject | Re: [PATCH] mm: mmap: show vm_unmapped_area error log |
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On Sat, Mar 07, 2020 at 03:47:44PM -0800, Andrew Morton wrote: > On Fri, 6 Mar 2020 15:16:22 +0900 Jaewon Kim <jaewon31.kim@samsung.com> wrote: > > Even on 64 bit kernel, the mmap failure can happen for a 32 bit task. > > Virtual memory space shortage of a task on mmap is reported to userspace > > as -ENOMEM. It can be confused as physical memory shortage of overall > > system.
But userspace can trigger this printk. We don't usually allow printks under those circumstances, even ratelimited.
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