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This patch series intends to summarize the recent contributions made by Michael S. Tsirkin, Tetsuo Handa, Michal Hocko etc. via reporting and discussing the related deadlock issues on the mailinglist. Please check each patch for details. >From a high-level point of view, this patch series achieves: 1) eliminate the deadlock issue fundamentally caused by the inability to run leak_balloon and

This patch series intends to summarize the recent contributions made by Michael S. Tsirkin, Tetsuo Handa, Michal Hocko etc. via reporting and discussing the related deadlock issues on the mailinglist. Please check each patch for details. >From a high-level point of view, this patch series achieves: 1) eliminate the deadlock issue fundamentally caused by the inability to run leak_balloon and

...Hocko <mhocko at kernel.org> Cc: Tetsuo Handa <penguin-kernel at I-love.SAKURA.ne.jp> --- drivers/virtio/virtio_balloon.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index 1ecd15a..ab55cf8 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -43,8 +43,8 @@ #define OOM_VBALLOON_DEFAULT_PAGES 256 #define VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 -static int oom_pages = OOM_VBALLOON_DEFAULT_PAGES; -module_param(oom_pages, int, S_IRUSR | S_IWUSR); +static un...

...SAKURA.ne.jp> This seems reasonable. Does this by itself help? > --- > drivers/virtio/virtio_balloon.c | 14 +++++++++----- > 1 file changed, 9 insertions(+), 5 deletions(-) > > diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c > index 1ecd15a..ab55cf8 100644 > --- a/drivers/virtio/virtio_balloon.c > +++ b/drivers/virtio/virtio_balloon.c > @@ -43,8 +43,8 @@ > #define OOM_VBALLOON_DEFAULT_PAGES 256 > #define VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 > > -static int oom_pages = OOM_VBALLOON_DEFAULT_PAGES; > -module_param(oom_pa...

...SAKURA.ne.jp> This seems reasonable. Does this by itself help? > --- > drivers/virtio/virtio_balloon.c | 14 +++++++++----- > 1 file changed, 9 insertions(+), 5 deletions(-) > > diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c > index 1ecd15a..ab55cf8 100644 > --- a/drivers/virtio/virtio_balloon.c > +++ b/drivers/virtio/virtio_balloon.c > @@ -43,8 +43,8 @@ > #define OOM_VBALLOON_DEFAULT_PAGES 256 > #define VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 > > -static int oom_pages = OOM_VBALLOON_DEFAULT_PAGES; > -module_param(oom_pa...

...penguin-kernel at I-love.SAKURA.ne.jp> Cc: Michal Hocko <mhocko at kernel.org> --- drivers/virtio/virtio_balloon.c | 33 +++++++++++++++++++++++++++++---- 1 file changed, 29 insertions(+), 4 deletions(-) diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index ab55cf8..cf29663 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -63,6 +63,15 @@ struct virtio_balloon { spinlock_t stop_update_lock; bool stop_update; + /* + * The balloon driver enters the oom mode if the oom notifier is + * invoked. Entering the oom mode wil...

...jp> > Cc: Michal Hocko <mhocko at kernel.org> > --- > drivers/virtio/virtio_balloon.c | 33 +++++++++++++++++++++++++++++---- > 1 file changed, 29 insertions(+), 4 deletions(-) > > diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c > index ab55cf8..cf29663 100644 > --- a/drivers/virtio/virtio_balloon.c > +++ b/drivers/virtio/virtio_balloon.c > @@ -63,6 +63,15 @@ struct virtio_balloon { > spinlock_t stop_update_lock; > bool stop_update; > > + /* > + * The balloon driver enters the oom mode if the oom notifier is...

...jp> > Cc: Michal Hocko <mhocko at kernel.org> > --- > drivers/virtio/virtio_balloon.c | 33 +++++++++++++++++++++++++++++---- > 1 file changed, 29 insertions(+), 4 deletions(-) > > diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c > index ab55cf8..cf29663 100644 > --- a/drivers/virtio/virtio_balloon.c > +++ b/drivers/virtio/virtio_balloon.c > @@ -63,6 +63,15 @@ struct virtio_balloon { > spinlock_t stop_update_lock; > bool stop_update; > > + /* > + * The balloon driver enters the oom mode if the oom notifier is...