From: Thomas Gleixner <tglx@linutronix.de>
To: Dan Williams <dan.j.williams@intel.com>, mingo@redhat.com
Cc: Dave Hansen <dave.hansen@linux.intel.com>,
Andy Lutomirski <luto@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Borislav Petkov <bp@alien8.de>, "H. Peter Anvin" <hpa@zytor.com>,
x86@kernel.org, Andrew Morton <akpm@linux-foundation.org>,
David Hildenbrand <david@redhat.com>,
Michal Hocko <mhocko@suse.com>, kbuild test robot <lkp@intel.com>,
hch@lst.de, linux-kernel@vger.kernel.org,
linux-nvdimm@lists.01.org
Subject: Re: [PATCH v4 5/6] x86/numa: Provide a range-to-target_node lookup facility
Date: Thu, 13 Feb 2020 12:37:42 +0100 [thread overview]
Message-ID: <874kvu3egp.fsf@nanos.tec.linutronix.de> (raw)
In-Reply-To: <157966230092.2508551.3905721944859436879.stgit@dwillia2-desk3.amr.corp.intel.com>
Dan Williams <dan.j.williams@intel.com> writes:
> +/**
> + * numa_move_memblk - Move one numa_memblk from one numa_meminfo to another
> + * @dst: numa_meminfo to move block to
> + * @idx: Index of memblk to remove
> + * @src: numa_meminfo to remove memblk from
> + *
> + * If @dst is non-NULL add it at the @dst->nr_blks index and increment
> + * @dst->nr_blks, then remove it from @src.
This is not correct. It's suggesting that these operations are only
happening when @dst is non-NULL. Remove is unconditional though.
Also this is called with &numa_reserved_meminfo as @dst argument, which is:
> +static struct numa_meminfo numa_reserved_meminfo __initdata_numa;
So how would @dst ever be NULL?
> + */
> +static void __init numa_move_memblk(struct numa_meminfo *dst, int idx,
> + struct numa_meminfo *src)
> +{
> + if (dst) {
> + memcpy(&dst->blk[dst->nr_blks], &src->blk[idx],
> + sizeof(struct numa_memblk));
> + dst->nr_blks++;
> + }
> + numa_remove_memblk_from(idx, src);
> +}
...
> - /* make sure all blocks are inside the limits */
> + /* move / save reserved memory ranges */
> + if (!memblock_overlaps_region(&memblock.memory,
> + bi->start, bi->end - bi->start)) {
> + numa_move_memblk(&numa_reserved_meminfo, i--, mi);
Thanks,
tglx
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next prev parent reply other threads:[~2020-02-13 11:37 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-22 3:04 [PATCH v4 0/6] Memory Hierarchy: Enable target node lookups for reserved memory Dan Williams
2020-01-22 3:04 ` [PATCH v4 1/6] ACPI: NUMA: Up-level "map to online node" functionality Dan Williams
2020-01-22 3:04 ` [PATCH v4 2/6] mm/numa: Skip NUMA_NO_NODE and online nodes in numa_map_to_online_node() Dan Williams
2020-01-22 3:04 ` [PATCH v4 3/6] powerpc/papr_scm: Switch to numa_map_to_online_node() Dan Williams
2020-01-22 3:04 ` [PATCH v4 4/6] x86/mm: Introduce CONFIG_KEEP_NUMA Dan Williams
2020-02-13 9:32 ` Ingo Molnar
2020-02-13 21:19 ` Dan Williams
2020-02-13 11:22 ` Thomas Gleixner
2020-02-13 21:21 ` Dan Williams
2020-01-22 3:05 ` [PATCH v4 5/6] x86/numa: Provide a range-to-target_node lookup facility Dan Williams
2020-02-13 9:36 ` Ingo Molnar
2020-02-13 11:37 ` Thomas Gleixner [this message]
2020-02-13 21:40 ` Dan Williams
2020-01-22 3:05 ` [PATCH v4 6/6] libnvdimm/e820: Retrieve and populate correct 'target_node' info Dan Williams
2020-02-13 2:28 ` [PATCH v4 0/6] Memory Hierarchy: Enable target node lookups for reserved memory Dan Williams
2020-02-13 9:37 ` Ingo Molnar
2020-02-16 20:00 ` [PATCH v5 " Dan Williams
2020-02-16 20:00 ` [PATCH v5 1/6] ACPI: NUMA: Up-level "map to online node" functionality Dan Williams
2020-02-16 20:00 ` [PATCH v5 2/6] mm/numa: Skip NUMA_NO_NODE and online nodes in numa_map_to_online_node() Dan Williams
2020-02-16 20:00 ` [PATCH v5 3/6] powerpc/papr_scm: Switch to numa_map_to_online_node() Dan Williams
2020-02-16 20:01 ` [PATCH v5 4/6] x86/mm: Introduce CONFIG_NUMA_KEEP_MEMINFO Dan Williams
2020-02-17 8:21 ` Thomas Gleixner
2020-02-16 20:01 ` [PATCH v5 5/6] x86/NUMA: Provide a range-to-target_node lookup facility Dan Williams
2020-02-17 8:22 ` Thomas Gleixner
2020-02-16 20:01 ` [PATCH v5 6/6] libnvdimm/e820: Retrieve and populate correct 'target_node' info Dan Williams
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