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| author | Jiri Kosina <jkosina@suse.cz> | 2010-06-16 18:08:13 +0200 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2010-06-16 18:08:13 +0200 |
| commit | f1bbbb6912662b9f6070c5bfc4ca9eb1f06a9d5b (patch) | |
| tree | c2c130a74be25b0b2dff992e1a195e2728bdaadd /drivers/misc/vmware_balloon.c | |
| parent | fix typos concerning "instead" (diff) | |
| parent | Linux 2.6.35-rc3 (diff) | |
| download | linux-f1bbbb6912662b9f6070c5bfc4ca9eb1f06a9d5b.tar.xz linux-f1bbbb6912662b9f6070c5bfc4ca9eb1f06a9d5b.zip | |
Merge branch 'master' into for-next
Diffstat (limited to 'drivers/misc/vmware_balloon.c')
| -rw-r--r-- | drivers/misc/vmware_balloon.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/drivers/misc/vmware_balloon.c b/drivers/misc/vmware_balloon.c index db9cd0240c6f..2a1e804a71aa 100644 --- a/drivers/misc/vmware_balloon.c +++ b/drivers/misc/vmware_balloon.c @@ -45,7 +45,7 @@ MODULE_AUTHOR("VMware, Inc."); MODULE_DESCRIPTION("VMware Memory Control (Balloon) Driver"); -MODULE_VERSION("1.2.1.0-K"); +MODULE_VERSION("1.2.1.1-k"); MODULE_ALIAS("dmi:*:svnVMware*:*"); MODULE_ALIAS("vmware_vmmemctl"); MODULE_LICENSE("GPL"); @@ -101,6 +101,8 @@ MODULE_LICENSE("GPL"); /* Maximum number of page allocations without yielding processor */ #define VMW_BALLOON_YIELD_THRESHOLD 1024 +/* Maximum number of refused pages we accumulate during inflation cycle */ +#define VMW_BALLOON_MAX_REFUSED 16 /* * Hypervisor communication port definitions. @@ -183,6 +185,7 @@ struct vmballoon { /* transient list of non-balloonable pages */ struct list_head refused_pages; + unsigned int n_refused_pages; /* balloon size in pages */ unsigned int size; @@ -428,14 +431,21 @@ static int vmballoon_reserve_page(struct vmballoon *b, bool can_sleep) /* inform monitor */ locked = vmballoon_send_lock_page(b, page_to_pfn(page)); if (!locked) { + STATS_INC(b->stats.refused_alloc); + if (b->reset_required) { __free_page(page); return -EIO; } - /* place on list of non-balloonable pages, retry allocation */ + /* + * Place page on the list of non-balloonable pages + * and retry allocation, unless we already accumulated + * too many of them, in which case take a breather. + */ list_add(&page->lru, &b->refused_pages); - STATS_INC(b->stats.refused_alloc); + if (++b->n_refused_pages >= VMW_BALLOON_MAX_REFUSED) + return -EIO; } } while (!locked); @@ -483,6 +493,8 @@ static void vmballoon_release_refused_pages(struct vmballoon *b) __free_page(page); STATS_INC(b->stats.refused_free); } + + b->n_refused_pages = 0; } /* |