diff options
Diffstat (limited to 'drivers/xen')
| -rw-r--r-- | drivers/xen/balloon.c | 3 | ||||
| -rw-r--r-- | drivers/xen/events/events_base.c | 13 | ||||
| -rw-r--r-- | drivers/xen/grant-table.c | 9 | ||||
| -rw-r--r-- | drivers/xen/xen-balloon.c | 22 | ||||
| -rw-r--r-- | drivers/xen/xen-selfballoon.c | 4 | ||||
| -rw-r--r-- | drivers/xen/xenfs/super.c | 1 |
6 files changed, 28 insertions, 24 deletions
diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c index 50dcb68d8070..ab609255a0f3 100644 --- a/drivers/xen/balloon.c +++ b/drivers/xen/balloon.c @@ -780,6 +780,9 @@ static int __init balloon_init(void) } #endif + /* Init the xen-balloon driver. */ + xen_balloon_init(); + return 0; } subsys_initcall(balloon_init); diff --git a/drivers/xen/events/events_base.c b/drivers/xen/events/events_base.c index b241bfa529ce..bae1f5d36c26 100644 --- a/drivers/xen/events/events_base.c +++ b/drivers/xen/events/events_base.c @@ -343,14 +343,6 @@ static void bind_evtchn_to_cpu(unsigned int chn, unsigned int cpu) info->cpu = cpu; } -static void xen_evtchn_mask_all(void) -{ - unsigned int evtchn; - - for (evtchn = 0; evtchn < xen_evtchn_nr_channels(); evtchn++) - mask_evtchn(evtchn); -} - /** * notify_remote_via_irq - send event to remote end of event channel via irq * @irq: irq of event channel to send event to @@ -1573,7 +1565,6 @@ void xen_irq_resume(void) struct irq_info *info; /* New event-channel space is not 'live' yet. */ - xen_evtchn_mask_all(); xen_evtchn_resume(); /* No IRQ <-> event-channel mappings. */ @@ -1681,6 +1672,7 @@ module_param(fifo_events, bool, 0); void __init xen_init_IRQ(void) { int ret = -EINVAL; + unsigned int evtchn; if (fifo_events) ret = xen_evtchn_fifo_init(); @@ -1692,7 +1684,8 @@ void __init xen_init_IRQ(void) BUG_ON(!evtchn_to_irq); /* No event channels are 'live' right now. */ - xen_evtchn_mask_all(); + for (evtchn = 0; evtchn < xen_evtchn_nr_channels(); evtchn++) + mask_evtchn(evtchn); pirq_needs_eoi = pirq_needs_eoi_flag; diff --git a/drivers/xen/grant-table.c b/drivers/xen/grant-table.c index d6786b87e13b..2c6a9114d332 100644 --- a/drivers/xen/grant-table.c +++ b/drivers/xen/grant-table.c @@ -42,6 +42,7 @@ #include <linux/delay.h> #include <linux/hardirq.h> #include <linux/workqueue.h> +#include <linux/ratelimit.h> #include <xen/xen.h> #include <xen/interface/xen.h> @@ -1072,8 +1073,14 @@ static int gnttab_expand(unsigned int req_entries) cur = nr_grant_frames; extra = ((req_entries + (grefs_per_grant_frame-1)) / grefs_per_grant_frame); - if (cur + extra > gnttab_max_grant_frames()) + if (cur + extra > gnttab_max_grant_frames()) { + pr_warn_ratelimited("xen/grant-table: max_grant_frames reached" + " cur=%u extra=%u limit=%u" + " gnttab_free_count=%u req_entries=%u\n", + cur, extra, gnttab_max_grant_frames(), + gnttab_free_count, req_entries); return -ENOSPC; + } rc = gnttab_map(cur, cur + extra - 1); if (rc == 0) diff --git a/drivers/xen/xen-balloon.c b/drivers/xen/xen-balloon.c index e7715cb62eef..e89136ab851e 100644 --- a/drivers/xen/xen-balloon.c +++ b/drivers/xen/xen-balloon.c @@ -59,6 +59,8 @@ static void watch_target(struct xenbus_watch *watch, { unsigned long long new_target; int err; + static bool watch_fired; + static long target_diff; err = xenbus_scanf(XBT_NIL, "memory", "target", "%llu", &new_target); if (err != 1) { @@ -69,7 +71,14 @@ static void watch_target(struct xenbus_watch *watch, /* The given memory/target value is in KiB, so it needs converting to * pages. PAGE_SHIFT converts bytes to pages, hence PAGE_SHIFT - 10. */ - balloon_set_new_target(new_target >> (PAGE_SHIFT - 10)); + new_target >>= PAGE_SHIFT - 10; + if (watch_fired) { + balloon_set_new_target(new_target - target_diff); + return; + } + + watch_fired = true; + target_diff = new_target - balloon_stats.target_pages; } static struct xenbus_watch target_watch = { .node = "memory/target", @@ -94,22 +103,15 @@ static struct notifier_block xenstore_notifier = { .notifier_call = balloon_init_watcher, }; -static int __init balloon_init(void) +void xen_balloon_init(void) { - if (!xen_domain()) - return -ENODEV; - - pr_info("Initialising balloon driver\n"); - register_balloon(&balloon_dev); register_xen_selfballooning(&balloon_dev); register_xenstore_notifier(&xenstore_notifier); - - return 0; } -subsys_initcall(balloon_init); +EXPORT_SYMBOL_GPL(xen_balloon_init); #define BALLOON_SHOW(name, format, args...) \ static ssize_t show_##name(struct device *dev, \ diff --git a/drivers/xen/xen-selfballoon.c b/drivers/xen/xen-selfballoon.c index 66620713242a..a67e955cacd1 100644 --- a/drivers/xen/xen-selfballoon.c +++ b/drivers/xen/xen-selfballoon.c @@ -151,8 +151,8 @@ static unsigned long frontswap_inertia_counter; static void frontswap_selfshrink(void) { static unsigned long cur_frontswap_pages; - static unsigned long last_frontswap_pages; - static unsigned long tgt_frontswap_pages; + unsigned long last_frontswap_pages; + unsigned long tgt_frontswap_pages; last_frontswap_pages = cur_frontswap_pages; cur_frontswap_pages = frontswap_curr_pages(); diff --git a/drivers/xen/xenfs/super.c b/drivers/xen/xenfs/super.c index 967f069385d0..71ddfb4cf61c 100644 --- a/drivers/xen/xenfs/super.c +++ b/drivers/xen/xenfs/super.c @@ -87,7 +87,6 @@ static int __init xenfs_init(void) if (xen_domain()) return register_filesystem(&xenfs_type); - pr_info("not registering filesystem on non-xen platform\n"); return 0; } |