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X-FangMail-Envelope: 1678082858/4PVSmB5TSFz8R045/6405832A.001/10.5.228.133/[10.5.228.133]/mse-fl2.zte.com.cn/ X-Fangmail-Anti-Spam-Filtered: true X-Fangmail-MID-QID: 6405832A.001/4PVSmB5TSFz8R045 X-Stat-Signature: zb81ftkfkfngn1c8yftqwnfr4c1ync8u X-Rspam-User: X-Rspamd-Queue-Id: 5327F1C0009 X-Rspamd-Server: rspam06 X-HE-Tag: 1678082861-698201 X-HE-Meta: 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 p8R54AAa Wb94QRwRu1N+hF9OKGuCbQb5MhUFxJYz3Hw9EGQhVrzU9fO1Q2bZ1LqEPP/aattZR4XXCf5DisuDlV2B/e6brs/Nq2KqRNbWYjPF1znJ/CCNkADkgNsJkrgSU3swHItNtFlkwOV5ej87tqLr43yfISIvV1y8k8UiCf1LsDitua1RNdXDmQP1yxaauWz03Oi/EjvizKUVerU46UTNyaRW2fwcMmYMy1kkHFqlOzg0GVkwPY78XMsXGAyt4ErJk5RxwDL3x/pb8eclNb1AOFvAOlMj1VRHt8sF6K8Rx4jMTWUC+mtTpqwN2a0nHYcmPu4edQV7EsqICZx50kqRemEmzwBBjS14oy0IwR9MUoaOHOeHT5yhxcwOE22JOI67lN20nT/vKWxe4EeViGzF/rCUD6MsKTw== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Minghao Chi In Documentation/admin-guide/sysctl/vm.rst:109 say: when 1 is written to the file, all zones are compacted such that free memory is available in contiguous blocks where possible. So limit the value of interface compact_memory to 1. Link: https://lore.kernel.org/all/ZAJwoXJCzfk1WIBx@bombadil.infradead.org/ Signed-off-by: Minghao Chi Signed-off-by: Ye Xingchen --- include/linux/compaction.h | 1 + kernel/sysctl.c | 4 +++- 2 files changed, 4 insertions(+), 1 deletion(-) diff --git a/include/linux/compaction.h b/include/linux/compaction.h index 52a9ff65faee..caa24e33eeb1 100644 --- a/include/linux/compaction.h +++ b/include/linux/compaction.h @@ -81,6 +81,7 @@ static inline unsigned long compact_gap(unsigned int order) } #ifdef CONFIG_COMPACTION +extern int sysctl_compact_memory; extern unsigned int sysctl_compaction_proactiveness; extern int sysctl_compaction_handler(struct ctl_table *table, int write, void *buffer, size_t *length, loff_t *ppos); diff --git a/kernel/sysctl.c b/kernel/sysctl.c index c14552a662ae..67f70952f71a 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -2192,10 +2192,12 @@ static struct ctl_table vm_table[] = { #ifdef CONFIG_COMPACTION { .procname = "compact_memory", - .data = NULL, + .data = &sysctl_compact_memory, .maxlen = sizeof(int), .mode = 0200, .proc_handler = sysctl_compaction_handler, + .extra1 = SYSCTL_ONE, + .extra2 = SYSCTL_ONE, }, { .procname = "compaction_proactiveness", -- 2.25.1