From 4326ab1806a52888d1cd076b9020677703e25545 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ilpo=20J=C3=A4rvinen?= Date: Fri, 19 Dec 2025 19:40:17 +0200 Subject: [PATCH] resource: Increase MAX_IORES_LEVEL to 8 MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit While debugging a PCI resource allocation issue, the resources for many nested bridges and endpoints got flattened in /proc/iomem by MAX_IORES_LEVEL that is set to 5. This made the iomem output hard to read as the visual hierarchy cues were lost. Increase MAX_IORES_LEVEL to 8 to avoid flattening PCI topologies with nested bridges so aggressively (the case in the Link has the deepest resource at level 7 so 8 looks a reasonable limit). Link: https://bugzilla.kernel.org/show_bug.cgi?id=220775 Signed-off-by: Ilpo Järvinen Signed-off-by: Bjorn Helgaas Link: https://patch.msgid.link/20251219174036.16738-5-ilpo.jarvinen@linux.intel.com --- kernel/resource.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/resource.c b/kernel/resource.c index e4e9bac12e6e1..c5f03ac78e446 100644 --- a/kernel/resource.c +++ b/kernel/resource.c @@ -82,7 +82,7 @@ static struct resource *next_resource(struct resource *p, bool skip_children, #ifdef CONFIG_PROC_FS -enum { MAX_IORES_LEVEL = 5 }; +enum { MAX_IORES_LEVEL = 8 }; static void *r_start(struct seq_file *m, loff_t *pos) __acquires(resource_lock) -- 2.47.3