Displaying 20 results from an estimated 27 matches for "shrink_balloon_pag".
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shrink_balloon_pages
2020 Feb 06
6
[PATCH RFC] virtio_balloon: conservative balloon page shrinking
...conservative_shrinker = true;
+module_param(conservative_shrinker, bool, 0644);
+MODULE_PARM_DESC(conservative_shrinker, "conservatively shrink balloon pages");
+
enum virtio_balloon_vq {
VIRTIO_BALLOON_VQ_INFLATE,
VIRTIO_BALLOON_VQ_DEFLATE,
@@ -796,6 +800,10 @@ static unsigned long shrink_balloon_pages(struct virtio_balloon *vb,
{
unsigned long pages_freed = 0;
+ /* Balloon pages only gets shrunk when the pagecache depleted */
+ if (conservative_shrinker && global_node_page_state(NR_FILE_PAGES))
+ return 0;
+
/*
* One invocation of leak_balloon can deflate at most
* VIRTIO...
2020 Feb 06
6
[PATCH RFC] virtio_balloon: conservative balloon page shrinking
...conservative_shrinker = true;
+module_param(conservative_shrinker, bool, 0644);
+MODULE_PARM_DESC(conservative_shrinker, "conservatively shrink balloon pages");
+
enum virtio_balloon_vq {
VIRTIO_BALLOON_VQ_INFLATE,
VIRTIO_BALLOON_VQ_DEFLATE,
@@ -796,6 +800,10 @@ static unsigned long shrink_balloon_pages(struct virtio_balloon *vb,
{
unsigned long pages_freed = 0;
+ /* Balloon pages only gets shrunk when the pagecache depleted */
+ if (conservative_shrinker && global_node_page_state(NR_FILE_PAGES))
+ return 0;
+
/*
* One invocation of leak_balloon can deflate at most
* VIRTIO...
2020 Feb 05
2
[PATCH v1 3/3] virtio-balloon: Switch back to OOM handler for VIRTIO_BALLOON_F_DEFLATE_ON_OOM
...es(struct virtio_balloon *vb,
> - unsigned long pages_to_free)
> -{
> - return leak_balloon(vb, pages_to_free *
> VIRTIO_BALLOON_PAGES_PER_PAGE) /
> - VIRTIO_BALLOON_PAGES_PER_PAGE;
> -}
> -
> -static unsigned long shrink_balloon_pages(struct virtio_balloon *vb,
> - unsigned long pages_to_free)
> -{
> - unsigned long pages_freed = 0;
> -
> - /*
> - * One invocation of leak_balloon can deflate at most
> - * VIRTIO_BALLOON_ARRAY_PFNS_MAX balloo...
2020 Feb 05
2
[PATCH v1 3/3] virtio-balloon: Switch back to OOM handler for VIRTIO_BALLOON_F_DEFLATE_ON_OOM
...es(struct virtio_balloon *vb,
> - unsigned long pages_to_free)
> -{
> - return leak_balloon(vb, pages_to_free *
> VIRTIO_BALLOON_PAGES_PER_PAGE) /
> - VIRTIO_BALLOON_PAGES_PER_PAGE;
> -}
> -
> -static unsigned long shrink_balloon_pages(struct virtio_balloon *vb,
> - unsigned long pages_to_free)
> -{
> - unsigned long pages_freed = 0;
> -
> - /*
> - * One invocation of leak_balloon can deflate at most
> - * VIRTIO_BALLOON_ARRAY_PFNS_MAX balloo...
2020 Jun 08
0
[PATCH AUTOSEL 5.6 165/606] virtio-balloon: Revert "virtio-balloon: Switch back to OOM handler for VIRTIO_BALLOON_F_DEFLATE_ON_OOM"
...NT_BLOCK_PAGES;
}
+static unsigned long leak_balloon_pages(struct virtio_balloon *vb,
+ unsigned long pages_to_free)
+{
+ return leak_balloon(vb, pages_to_free * VIRTIO_BALLOON_PAGES_PER_PAGE) /
+ VIRTIO_BALLOON_PAGES_PER_PAGE;
+}
+
+static unsigned long shrink_balloon_pages(struct virtio_balloon *vb,
+ unsigned long pages_to_free)
+{
+ unsigned long pages_freed = 0;
+
+ /*
+ * One invocation of leak_balloon can deflate at most
+ * VIRTIO_BALLOON_ARRAY_PFNS_MAX balloon pages, so we call it
+ * multiple times to deflate pages till reaching pages_to_free.
+ *...
2020 Jun 08
0
[PATCH AUTOSEL 5.6 240/606] Revert "virtio-balloon: Revert "virtio-balloon: Switch back to OOM handler for VIRTIO_BALLOON_F_DEFLATE_ON_OOM""
...NT_BLOCK_PAGES;
}
-static unsigned long leak_balloon_pages(struct virtio_balloon *vb,
- unsigned long pages_to_free)
-{
- return leak_balloon(vb, pages_to_free * VIRTIO_BALLOON_PAGES_PER_PAGE) /
- VIRTIO_BALLOON_PAGES_PER_PAGE;
-}
-
-static unsigned long shrink_balloon_pages(struct virtio_balloon *vb,
- unsigned long pages_to_free)
-{
- unsigned long pages_freed = 0;
-
- /*
- * One invocation of leak_balloon can deflate at most
- * VIRTIO_BALLOON_ARRAY_PFNS_MAX balloon pages, so we call it
- * multiple times to deflate pages till reaching pages_to_free.
- *...
2020 Feb 05
12
[PATCH v1 0/3] virtio-balloon: Fixes + switch back to OOM handler
Two fixes for issues I stumbled over while working on patch #3.
Switch back to the good ol' OOM handler for VIRTIO_BALLOON_F_DEFLATE_ON_OOM
as the switch to the shrinker introduce some undesired side effects. Keep
the shrinker in place to handle VIRTIO_BALLOON_F_FREE_PAGE_HINT.
Lengthy discussion under [1].
I tested with QEMU and "deflate-on-oom=on". Works as expected. Did not
test
2020 Mar 11
2
[PATCH v4 0/1] mm: virtio-balloon fix to go through the -mm tree
@Andrew, as this fix is based on free page reporting, can this go through
your tree?
Patch #1 contains a proper description.
v3 -> v4:
- Add Ack from David Rientjes
- Minor tweaks to test details in the patch description
v2 -> v3:
- Use vb->vdev instead of vdev in all feature checks. We'll clean the
other ones up later.
- Add one empty line virtballoon_probe() to make it look
2020 Mar 10
2
[PATCH v2] virtio-balloon: Switch back to OOM handler for VIRTIO_BALLOON_F_DEFLATE_ON_OOM
...NT_BLOCK_PAGES;
}
-static unsigned long leak_balloon_pages(struct virtio_balloon *vb,
- unsigned long pages_to_free)
-{
- return leak_balloon(vb, pages_to_free * VIRTIO_BALLOON_PAGES_PER_PAGE) /
- VIRTIO_BALLOON_PAGES_PER_PAGE;
-}
-
-static unsigned long shrink_balloon_pages(struct virtio_balloon *vb,
- unsigned long pages_to_free)
-{
- unsigned long pages_freed = 0;
-
- /*
- * One invocation of leak_balloon can deflate at most
- * VIRTIO_BALLOON_ARRAY_PFNS_MAX balloon pages, so we call it
- * multiple times to deflate pages till reaching pages_to_free.
- *...
2020 Mar 10
2
[PATCH v2] virtio-balloon: Switch back to OOM handler for VIRTIO_BALLOON_F_DEFLATE_ON_OOM
...NT_BLOCK_PAGES;
}
-static unsigned long leak_balloon_pages(struct virtio_balloon *vb,
- unsigned long pages_to_free)
-{
- return leak_balloon(vb, pages_to_free * VIRTIO_BALLOON_PAGES_PER_PAGE) /
- VIRTIO_BALLOON_PAGES_PER_PAGE;
-}
-
-static unsigned long shrink_balloon_pages(struct virtio_balloon *vb,
- unsigned long pages_to_free)
-{
- unsigned long pages_freed = 0;
-
- /*
- * One invocation of leak_balloon can deflate at most
- * VIRTIO_BALLOON_ARRAY_PFNS_MAX balloon pages, so we call it
- * multiple times to deflate pages till reaching pages_to_free.
- *...
2020 Feb 05
0
[PATCH v1 3/3] virtio-balloon: Switch back to OOM handler for VIRTIO_BALLOON_F_DEFLATE_ON_OOM
...NT_BLOCK_PAGES;
}
-static unsigned long leak_balloon_pages(struct virtio_balloon *vb,
- unsigned long pages_to_free)
-{
- return leak_balloon(vb, pages_to_free * VIRTIO_BALLOON_PAGES_PER_PAGE) /
- VIRTIO_BALLOON_PAGES_PER_PAGE;
-}
-
-static unsigned long shrink_balloon_pages(struct virtio_balloon *vb,
- unsigned long pages_to_free)
-{
- unsigned long pages_freed = 0;
-
- /*
- * One invocation of leak_balloon can deflate at most
- * VIRTIO_BALLOON_ARRAY_PFNS_MAX balloon pages, so we call it
- * multiple times to deflate pages till reaching pages_to_free.
- *...
2020 Feb 05
0
[PATCH v1 3/3] virtio-balloon: Switch back to OOM handler for VIRTIO_BALLOON_F_DEFLATE_ON_OOM
...n *vb,
>> - unsigned long pages_to_free)
>> -{
>> - return leak_balloon(vb, pages_to_free * VIRTIO_BALLOON_PAGES_PER_PAGE) /
>> - VIRTIO_BALLOON_PAGES_PER_PAGE;
>> -}
>> -
>> -static unsigned long shrink_balloon_pages(struct virtio_balloon *vb,
>> - unsigned long pages_to_free)
>> -{
>> - unsigned long pages_freed = 0;
>> -
>> - /*
>> - * One invocation of leak_balloon can deflate at most
>> - * VIRTIO_B...
2020 Mar 11
0
[PATCH v4] virtio-balloon: Switch back to OOM handler for VIRTIO_BALLOON_F_DEFLATE_ON_OOM
...NT_BLOCK_PAGES;
}
-static unsigned long leak_balloon_pages(struct virtio_balloon *vb,
- unsigned long pages_to_free)
-{
- return leak_balloon(vb, pages_to_free * VIRTIO_BALLOON_PAGES_PER_PAGE) /
- VIRTIO_BALLOON_PAGES_PER_PAGE;
-}
-
-static unsigned long shrink_balloon_pages(struct virtio_balloon *vb,
- unsigned long pages_to_free)
-{
- unsigned long pages_freed = 0;
-
- /*
- * One invocation of leak_balloon can deflate at most
- * VIRTIO_BALLOON_ARRAY_PFNS_MAX balloon pages, so we call it
- * multiple times to deflate pages till reaching pages_to_free.
- *...
2020 Mar 10
0
[PATCH v2] virtio-balloon: Switch back to OOM handler for VIRTIO_BALLOON_F_DEFLATE_ON_OOM
...ed long leak_balloon_pages(struct virtio_balloon *vb,
> - unsigned long pages_to_free)
> -{
> - return leak_balloon(vb, pages_to_free * VIRTIO_BALLOON_PAGES_PER_PAGE) /
> - VIRTIO_BALLOON_PAGES_PER_PAGE;
> -}
> -
> -static unsigned long shrink_balloon_pages(struct virtio_balloon *vb,
> - unsigned long pages_to_free)
> -{
> - unsigned long pages_freed = 0;
> -
> - /*
> - * One invocation of leak_balloon can deflate at most
> - * VIRTIO_BALLOON_ARRAY_PFNS_MAX balloon pages, so we call it
> - * multiple times to deflate...
2020 Apr 15
0
[PATCH AUTOSEL 5.6 111/129] virtio-balloon: Switch back to OOM handler for VIRTIO_BALLOON_F_DEFLATE_ON_OOM
...NT_BLOCK_PAGES;
}
-static unsigned long leak_balloon_pages(struct virtio_balloon *vb,
- unsigned long pages_to_free)
-{
- return leak_balloon(vb, pages_to_free * VIRTIO_BALLOON_PAGES_PER_PAGE) /
- VIRTIO_BALLOON_PAGES_PER_PAGE;
-}
-
-static unsigned long shrink_balloon_pages(struct virtio_balloon *vb,
- unsigned long pages_to_free)
-{
- unsigned long pages_freed = 0;
-
- /*
- * One invocation of leak_balloon can deflate at most
- * VIRTIO_BALLOON_ARRAY_PFNS_MAX balloon pages, so we call it
- * multiple times to deflate pages till reaching pages_to_free.
- *...
2020 Apr 15
0
[PATCH AUTOSEL 5.5 091/106] virtio-balloon: Switch back to OOM handler for VIRTIO_BALLOON_F_DEFLATE_ON_OOM
...NT_BLOCK_PAGES;
}
-static unsigned long leak_balloon_pages(struct virtio_balloon *vb,
- unsigned long pages_to_free)
-{
- return leak_balloon(vb, pages_to_free * VIRTIO_BALLOON_PAGES_PER_PAGE) /
- VIRTIO_BALLOON_PAGES_PER_PAGE;
-}
-
-static unsigned long shrink_balloon_pages(struct virtio_balloon *vb,
- unsigned long pages_to_free)
-{
- unsigned long pages_freed = 0;
-
- /*
- * One invocation of leak_balloon can deflate at most
- * VIRTIO_BALLOON_ARRAY_PFNS_MAX balloon pages, so we call it
- * multiple times to deflate pages till reaching pages_to_free.
- *...
2020 Mar 10
3
[PATCH v3] virtio-balloon: Switch back to OOM handler for VIRTIO_BALLOON_F_DEFLATE_ON_OOM
...NT_BLOCK_PAGES;
}
-static unsigned long leak_balloon_pages(struct virtio_balloon *vb,
- unsigned long pages_to_free)
-{
- return leak_balloon(vb, pages_to_free * VIRTIO_BALLOON_PAGES_PER_PAGE) /
- VIRTIO_BALLOON_PAGES_PER_PAGE;
-}
-
-static unsigned long shrink_balloon_pages(struct virtio_balloon *vb,
- unsigned long pages_to_free)
-{
- unsigned long pages_freed = 0;
-
- /*
- * One invocation of leak_balloon can deflate at most
- * VIRTIO_BALLOON_ARRAY_PFNS_MAX balloon pages, so we call it
- * multiple times to deflate pages till reaching pages_to_free.
- *...
2020 Mar 10
3
[PATCH v3] virtio-balloon: Switch back to OOM handler for VIRTIO_BALLOON_F_DEFLATE_ON_OOM
...NT_BLOCK_PAGES;
}
-static unsigned long leak_balloon_pages(struct virtio_balloon *vb,
- unsigned long pages_to_free)
-{
- return leak_balloon(vb, pages_to_free * VIRTIO_BALLOON_PAGES_PER_PAGE) /
- VIRTIO_BALLOON_PAGES_PER_PAGE;
-}
-
-static unsigned long shrink_balloon_pages(struct virtio_balloon *vb,
- unsigned long pages_to_free)
-{
- unsigned long pages_freed = 0;
-
- /*
- * One invocation of leak_balloon can deflate at most
- * VIRTIO_BALLOON_ARRAY_PFNS_MAX balloon pages, so we call it
- * multiple times to deflate pages till reaching pages_to_free.
- *...
2020 Feb 05
0
Balloon pressuring page cache
...so in whatever use case,
the host should not take the page to use. So the guest doesn't need to tell host and wait.
Back to the implementation of virtio_balloon_shrinker_scan, which I don't see an issue so far:
shrink_free_pages just return pages to mm without waiting for the ack from host
shrink_balloon_pages goes through leak_balloon which tell_host before release the balloon pages.
Best,
Wei
2020 Feb 06
0
[PATCH RFC] virtio_balloon: conservative balloon page shrinking
...+module_param(conservative_shrinker, bool, 0644);
> +MODULE_PARM_DESC(conservative_shrinker, "conservatively shrink balloon pages");
> +
> enum virtio_balloon_vq {
> VIRTIO_BALLOON_VQ_INFLATE,
> VIRTIO_BALLOON_VQ_DEFLATE,
> @@ -796,6 +800,10 @@ static unsigned long shrink_balloon_pages(struct virtio_balloon *vb,
> {
> unsigned long pages_freed = 0;
>
> + /* Balloon pages only gets shrunk when the pagecache depleted */
> + if (conservative_shrinker && global_node_page_state(NR_FILE_PAGES))
> + return 0;
> +
> /*
> * One invocation of...