Subject: [PATCH] powerpc/pseries: Provide verbose info about HPT resizing attempt

From: Bharata B Rao <[email-masked]>
Date: Wed, 10 Apr 2019 13:25:55 +0530

When HPT resizing is attempted in response to memory hotplug, we see
the following messages from the kernel:

lpar: Attempting to resize HPT to shift 23
Unable to resize hash page table to target order 23: -28

This gives a feeling as though we are trying to grow HPT but failed and
hence bad things might happen in future. Improve the message a bit
by explicitly printing the existing HPT shift value in addtion to
the newly targeted value so that it is clear that we haven't failed
to grow HPT. After this commit, the same message will appear like this:

lpar: Attempting to resize HPT from shift 25 to 23
Unable to resize hash page table to target order 23: -28

Signed-off-by: Bharata B Rao <[email-masked]>
---
 arch/powerpc/platforms/pseries/lpar.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c
index f2a9f0adc2d3..ecc7fa1876a9 100644
--- a/arch/powerpc/platforms/pseries/lpar.c
+++ b/arch/powerpc/platforms/pseries/lpar.c
@@ -875,7 +875,8 @@ static int pseries_lpar_resize_hpt(unsigned long shift)
 	if (!firmware_has_feature(FW_FEATURE_HPT_RESIZE))
 		return -ENODEV;
 
-	pr_info("Attempting to resize HPT to shift %lu\n", shift);
+	pr_info("Attempting to resize HPT from shift %llu to %lu\n", ppc64_pft_size,
+		shift);
 
 	t0 = ktime_get();
 
-- 
2.17.1