Commit 4326ab18 authored by Ilpo Järvinen's avatar Ilpo Järvinen Committed by Bjorn Helgaas
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resource: Increase MAX_IORES_LEVEL to 8 

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: default avatarIlpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/20251219174036.16738-5-ilpo.jarvinen@linux.intel.com
parent 3958bf16

kernel/resource.c

+1 −1
Original line number Diff line number Diff line
@@ -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)