linux-kernel - [PATCH v2 1/5] mips: Dump memblock regions for debugging

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Message-Id: <20190503175041.7949-2-fancer.lancer@gmail.com>
Date:   Fri,  3 May 2019 20:50:37 +0300
From:   Serge Semin <fancer.lancer@...il.com>
To:     Ralf Baechle <ralf@...ux-mips.org>,
        Paul Burton <paul.burton@...s.com>,
        James Hogan <jhogan@...nel.org>,
        Mike Rapoport <rppt@...ux.ibm.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Michal Hocko <mhocko@...e.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Thomas Bogendoerfer <tbogendoerfer@...e.de>,
        Huacai Chen <chenhc@...ote.com>,
        Stefan Agner <stefan@...er.ch>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Juergen Gross <jgross@...e.com>
Cc:     Serge Semin <Sergey.Semin@...latforms.ru>,
        linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 1/5] mips: Dump memblock regions for debugging

It is useful to have the whole memblock memory space printed to console
when basic memlock initializations are done. It can be performed by
ready-to-use method memblock_dump_all(), which prints the available
and reserved memory spaces if memblock=debug kernel parameter is
specified. Lets call it at the very end of arch_mem_init() function,
when all memblock memory and reserved regions are defined, but before
any serious allocation is performed.

Signed-off-by: Serge Semin <fancer.lancer@...il.com>

---
Changelog v2
- Reword commit message since memblock debug printout is activated by
  memblock=debug kernel parameter
---
 arch/mips/kernel/setup.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index 2a1b2e7a1bc9..ca493fdf69b0 100644
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -824,6 +824,8 @@ static void __init arch_mem_init(char **cmdline_p)
 	/* Reserve for hibernation. */
 	memblock_reserve(__pa_symbol(&__nosave_begin),
 		__pa_symbol(&__nosave_end) - __pa_symbol(&__nosave_begin));
+
+	memblock_dump_all();
 }
 
 static void __init resource_init(void)
-- 
2.21.0