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{
    "id": 811833,
    "url": "http://patchwork.ozlabs.org/api/patches/811833/?format=api",
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    "project": {
        "id": 7,
        "url": "http://patchwork.ozlabs.org/api/projects/7/?format=api",
        "name": "Linux network development",
        "link_name": "netdev",
        "list_id": "netdev.vger.kernel.org",
        "list_email": "netdev@vger.kernel.org",
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    "msgid": "<150490447017.11590.17727368565733920857.stgit@john-XPS-13-9360>",
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    "date": "2017-09-08T21:01:10",
    "name": "[net,3/3] bpf: devmap, use cond_resched instead of cpu_relax",
    "commit_ref": null,
    "pull_url": null,
    "state": "accepted",
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    "hash": "69d4046166e87a9d33457b9393fe59f304f34a97",
    "submitter": {
        "id": 20028,
        "url": "http://patchwork.ozlabs.org/api/people/20028/?format=api",
        "name": "John Fastabend",
        "email": "john.fastabend@gmail.com"
    },
    "delegate": {
        "id": 34,
        "url": "http://patchwork.ozlabs.org/api/users/34/?format=api",
        "username": "davem",
        "first_name": "David",
        "last_name": "Miller",
        "email": "davem@davemloft.net"
    },
    "mbox": "http://patchwork.ozlabs.org/project/netdev/patch/150490447017.11590.17727368565733920857.stgit@john-XPS-13-9360/mbox/",
    "series": [
        {
            "id": 2291,
            "url": "http://patchwork.ozlabs.org/api/series/2291/?format=api",
            "web_url": "http://patchwork.ozlabs.org/project/netdev/list/?series=2291",
            "date": "2017-09-08T21:00:05",
            "name": "Fixes for XDP/BPF",
            "version": 1,
            "mbox": "http://patchwork.ozlabs.org/series/2291/mbox/"
        }
    ],
    "comments": "http://patchwork.ozlabs.org/api/patches/811833/comments/",
    "check": "pending",
    "checks": "http://patchwork.ozlabs.org/api/patches/811833/checks/",
    "tags": {},
    "related": [],
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        "Subject": "[net PATCH 3/3] bpf: devmap, use cond_resched instead of cpu_relax",
        "From": "John Fastabend <john.fastabend@gmail.com>",
        "To": "davem@davemloft.net",
        "Cc": "netdev@vger.kernel.org, john.fastabend@gmail.com,\n\tdaniel@iogearbox.net, ast@fb.com",
        "Date": "Fri, 08 Sep 2017 14:01:10 -0700",
        "Message-ID": "<150490447017.11590.17727368565733920857.stgit@john-XPS-13-9360>",
        "In-Reply-To": "<150490397545.11590.1409723973253492363.stgit@john-XPS-13-9360>",
        "References": "<150490397545.11590.1409723973253492363.stgit@john-XPS-13-9360>",
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        "Sender": "netdev-owner@vger.kernel.org",
        "Precedence": "bulk",
        "List-ID": "<netdev.vger.kernel.org>",
        "X-Mailing-List": "netdev@vger.kernel.org"
    },
    "content": "Be a bit more friendly about waiting for flush bits to complete.\nReplace the cpu_relax() with a cond_resched().\n\nSuggested-by: Daniel Borkmann <daniel@iogearbox.net>\nAcked-by: Daniel Borkmann <daniel@iogearbox.net>\nSigned-off-by: John Fastabend <john.fastabend@gmail.com>\n---\n kernel/bpf/devmap.c |    2 +-\n 1 file changed, 1 insertion(+), 1 deletion(-)",
    "diff": "diff --git a/kernel/bpf/devmap.c b/kernel/bpf/devmap.c\nindex ecf9f99..959c9a0 100644\n--- a/kernel/bpf/devmap.c\n+++ b/kernel/bpf/devmap.c\n@@ -159,7 +159,7 @@ static void dev_map_free(struct bpf_map *map)\n \t\tunsigned long *bitmap = per_cpu_ptr(dtab->flush_needed, cpu);\n \n \t\twhile (!bitmap_empty(bitmap, dtab->map.max_entries))\n-\t\t\tcpu_relax();\n+\t\t\tcond_resched();\n \t}\n \n \tfor (i = 0; i < dtab->map.max_entries; i++) {\n",
    "prefixes": [
        "net",
        "3/3"
    ]
}