linux-kernel - Re: [PATCH v5 4/4] mm/sparse: Optimize memmap allocation during sparse

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Date:   Wed, 27 Jun 2018 23:19:22 -0400
From:   Pavel Tatashin <pasha.tatashin@...cle.com>
To:     bhe@...hat.com
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        dave.hansen@...el.com, pagupta@...hat.com,
        Linux Memory Management List <linux-mm@...ck.org>,
        kirill.shutemov@...ux.intel.com
Subject: Re: [PATCH v5 4/4] mm/sparse: Optimize memmap allocation during sparse_init()

> Signed-off-by: Baoquan He <bhe@...hat.com>
>
> Signed-off-by: Baoquan He <bhe@...hat.com>

Please remove duplicated signed-off

>                 if (!usemap) {
>                         ms->section_mem_map = 0;
> +                       nr_consumed_maps++;

Currently, we do not set ms->section_mem_map to 0 when fail to
allocate usemap, only when fail to allocate mmap we set
section_mem_map to 0. I think this is an existing bug.

Reviewed-by: Pavel Tatashin <pasha.tatashin@...cle.com>