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Wysocki" , Dave Hansen , Andy Lutomirski , "Peter Zijlstra" , Thomas Gleixner , "Ingo Molnar" , Borislav Petkov , CC: Dan Williams , Alison Schofield , , , , Robert Richter , "H. Peter Anvin" , Len Brown Subject: [PATCH v5 5/7] ACPI/NUMA: Return memblk modification state from numa_fill_memblks() Date: Mon, 29 Apr 2024 14:49:53 +0200 Message-ID: <20240429124955.2294014-6-rrichter@amd.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240429124955.2294014-1-rrichter@amd.com> References: <20240429124955.2294014-1-rrichter@amd.com> Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN3PEPF0000B372:EE_|PH7PR12MB6393:EE_ X-MS-Office365-Filtering-Correlation-Id: 34f6ad2d-50a6-4b8a-1c03-08dc684af8bc X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; ARA:13230031|376005|82310400014|1800799015|7416005|36860700004; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17; CTRY:US; LANG:en; SCL:1; SRV:; IPV:CAL; SFV:NSPM; H:SATLEXMB04.amd.com; PTR:InfoDomainNonexistent; CAT:NONE; SFS:(13230031)(376005)(82310400014)(1800799015)(7416005)(36860700004); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 29 Apr 2024 12:50:38.9245 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 34f6ad2d-50a6-4b8a-1c03-08dc684af8bc X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d; Ip=[165.204.84.17]; Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BN3PEPF0000B372.namprd21.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR12MB6393 When registering a memory range a possibly overlapping memory block will be extended instead of creating a new one. If both ranges exactly overlap, the blocks remain unchanged and are just reused. The information if a memblock was extended is useful for diagnostics. Change return code of numa_fill_memblks() to also report if memblocks have been modified. Link: https://lore.kernel.org/all/ZiqnbD0CB9WUL1zu@aschofie-mobl2/T/#u Cc: Alison Schofield Signed-off-by: Robert Richter --- arch/x86/mm/numa.c | 33 ++++++++++++++++++--------------- drivers/acpi/numa/srat.c | 5 +++-- 2 files changed, 21 insertions(+), 17 deletions(-) diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c index ce84ba86e69e..e34e96d57656 100644 --- a/arch/x86/mm/numa.c +++ b/arch/x86/mm/numa.c @@ -950,15 +950,16 @@ static struct numa_memblk *numa_memblk_list[NR_NODE_MEMBLKS] __initdata; * address range @start-@end * * RETURNS: - * 0 : Success - * NUMA_NO_MEMBLK : No memblks exist in address range @start-@end + * NUMA_NO_MEMBLK if no memblks exist in address range @start-@end, + * zero on success without blocks modified and non-zero positive + * values on success with blocks modified. */ int __init numa_fill_memblks(u64 start, u64 end) { struct numa_memblk **blk = &numa_memblk_list[0]; struct numa_meminfo *mi = &numa_meminfo; - int count = 0; + int count = 0, modified = 0; u64 prev_end; /* @@ -981,25 +982,27 @@ int __init numa_fill_memblks(u64 start, u64 end) /* Sort the list of pointers in memblk->start order */ sort(&blk[0], count, sizeof(blk[0]), cmp_memblk, NULL); - /* Make sure the first/last memblks include start/end */ - blk[0]->start = min(blk[0]->start, start); - blk[count - 1]->end = max(blk[count - 1]->end, end); - /* * Fill any gaps by tracking the previous memblks * end address and backfilling to it if needed. */ - prev_end = blk[0]->end; - for (int i = 1; i < count; i++) { + prev_end = start; + for (int i = 0; i < count; i++) { struct numa_memblk *curr = blk[i]; - if (prev_end >= curr->start) { - if (prev_end < curr->end) - prev_end = curr->end; - } else { + if (prev_end < curr->start) { curr->start = prev_end; - prev_end = curr->end; + modified = 1; } + + if (prev_end < curr->end) + prev_end = curr->end; } - return 0; + + if (blk[count - 1]->end < end) { + blk[count - 1]->end = end; + modified = 1; + } + + return modified; } diff --git a/drivers/acpi/numa/srat.c b/drivers/acpi/numa/srat.c index e3f26e71637a..76b39a6d3aef 100644 --- a/drivers/acpi/numa/srat.c +++ b/drivers/acpi/numa/srat.c @@ -326,7 +326,7 @@ static int __init acpi_parse_cfmws(union acpi_subtable_headers *header, struct acpi_cedt_cfmws *cfmws; int *fake_pxm = arg; u64 start, end; - int node; + int node, modified; cfmws = (struct acpi_cedt_cfmws *)header; start = cfmws->base_hpa; @@ -338,7 +338,8 @@ static int __init acpi_parse_cfmws(union acpi_subtable_headers *header, * found for any portion of the window to cover the entire * window. */ - if (!numa_fill_memblks(start, end)) + modified = numa_fill_memblks(start, end); + if (modified != NUMA_NO_MEMBLK) return 0; /* No SRAT description. Create a new node. */