On Thu, Sep 18, 2025 at 02:42:16PM +0100, Lorenzo Stoakes wrote: > On Mon, Sep 15, 2025 at 09:36:38AM -0700, Kalesh Singh wrote: > > Needed observability on in field devices can be collected with minimal > > overhead and can be toggled on and off. Event driven telemetry can be > > done with tracepoint BPF programs. > > > > The process comm is provided for aggregation across devices and tgid is > > to enable per-process aggregation per device. > > > > This allows for observing the distribution of such problems in the > > field, to deduce if there are legitimate bugs or if a bump to the limit is > > warranted. > > It's not really a bug though is it? It's somebody running out of resources. > > I'm not sure how useful this is really. But I'm open to being convinced! > > I also wonder if this is better as a statistic? You'd figure out it was a > problem that way too right? > > > > > Cc: Andrew Morton <[email protected]> > > Cc: David Hildenbrand <[email protected]> > > Cc: "Liam R. Howlett" <[email protected]> > > Cc: Lorenzo Stoakes <[email protected]> > > Cc: Mike Rapoport <[email protected]> > > Cc: Minchan Kim <[email protected]> > > Cc: Pedro Falcato <[email protected]> > > Signed-off-by: Kalesh Singh <[email protected]> > > This breaks the VMA tests, please make sure to always check them: > > cc -I../shared -I. -I../../include -I../../arch/x86/include -I../../../lib -g > -Og -Wall -D_LGPL_SOURCE -fsanitize=address -fsanitize=undefined -c -o > vma.o vma.c > In file included from vma.c:33: > ../../../mm/vma.c:10:10: fatal error: trace/events/vma.h: No such file or > directory > 10 | #include <trace/events/vma.h> > | ^~~~~~~~~~~~~~~~~~~~ > compilation terminated. > make: *** [<builtin>: vma.o] Error 1
Trivial build fix: ----8<---- >From fe4c30abbd302ccc628ec92381ac10cea31c6d85 Mon Sep 17 00:00:00 2001 From: Lorenzo Stoakes <[email protected]> Date: Thu, 18 Sep 2025 14:47:10 +0100 Subject: [PATCH] fix Signed-off-by: Lorenzo Stoakes <[email protected]> --- mm/vma.c | 2 -- mm/vma_internal.h | 2 ++ tools/testing/vma/vma_internal.h | 4 ++++ 3 files changed, 6 insertions(+), 2 deletions(-) diff --git a/mm/vma.c b/mm/vma.c index 26046b28cdda..a11d29a2ddc0 100644 --- a/mm/vma.c +++ b/mm/vma.c @@ -7,8 +7,6 @@ #include "vma_internal.h" #include "vma.h" -#include <trace/events/vma.h> - struct mmap_state { struct mm_struct *mm; struct vma_iterator *vmi; diff --git a/mm/vma_internal.h b/mm/vma_internal.h index 2f05735ff190..2f5ba679f43d 100644 --- a/mm/vma_internal.h +++ b/mm/vma_internal.h @@ -47,6 +47,8 @@ #include <linux/uprobes.h> #include <linux/userfaultfd_k.h> +#include <trace/events/vma.h> + #include <asm/current.h> #include <asm/tlb.h> diff --git a/tools/testing/vma/vma_internal.h b/tools/testing/vma/vma_internal.h index 07f4108c5e4c..c08c91861b9a 100644 --- a/tools/testing/vma/vma_internal.h +++ b/tools/testing/vma/vma_internal.h @@ -1661,4 +1661,8 @@ static inline void vma_count_dec(struct mm_struct *mm) vma_count_sub(mm, 1); } +static void trace_max_vma_count_exceeded(struct task_struct *task) +{ +} + #endif /* __MM_VMA_INTERNAL_H */ -- 2.51.0
