linux_dsm_epyc7002/include
Chris Wilson 4da56b99d9 mm/vmap: Add a notifier for when we run out of vmap address space
vmaps are temporary kernel mappings that may be of long duration.
Reusing a vmap on an object is preferrable for a driver as the cost of
setting up the vmap can otherwise dominate the operation on the object.
However, the vmap address space is rather limited on 32bit systems and
so we add a notification for vmap pressure in order for the driver to
release any cached vmappings.

The interface is styled after the oom-notifier where the callees are
passed a pointer to an unsigned long counter for them to indicate if they
have freed any space.

v2: Guard the blocking notifier call with gfpflags_allow_blocking()
v3: Correct typo in forward declaration and move to head of file

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Roman Peniaev <r.peniaev@gmail.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: linux-mm@kvack.org
Cc: linux-kernel@vger.kernel.org
Acked-by: Andrew Morton <akpm@linux-foundation.org> # for inclusion via DRM
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1459777603-23618-3-git-send-email-chris@chris-wilson.co.uk
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
2016-04-05 11:12:04 +01:00
..
acpi
asm-generic powerpc fixes for 4.5 2016-02-20 09:22:11 -08:00
clocksource
crypto
drm Merge tag 'topic/drm-misc-2016-03-14' of git://anongit.freedesktop.org/drm-intel into drm-next 2016-03-16 11:09:26 +10:00
dt-bindings Merge drm-fixes into drm-next. 2016-03-14 09:46:02 +10:00
keys
kvm
linux mm/vmap: Add a notifier for when we run out of vmap address space 2016-04-05 11:12:04 +01:00
math-emu
media [media] v4l: vsp1: Implement atomic update for the DRM driver 2016-02-19 09:31:19 -02:00
memory
misc
net Another small set of fixes: 2016-02-24 16:58:12 -05:00
pcmcia
ras
rdma
rxrpc
scsi
soc
sound ALSA: hda - Loop interrupt handling until really cleared 2016-02-26 08:50:31 +01:00
target
trace Merge remote-tracking branches 'asoc/fix/jack', 'asoc/fix/max98088', 'asoc/fix/max98095', 'asoc/fix/omap', 'asoc/fix/pxa' and 'asoc/fix/qcom-be' into asoc-linus 2016-03-05 21:26:45 +09:00
uapi Merge tag 'topic/drm-misc-2016-03-14' of git://anongit.freedesktop.org/drm-intel into drm-next 2016-03-16 11:09:26 +10:00
video drm/omap: add dispc_channel_connected field to omap_dss_device 2016-03-03 17:38:22 +02:00
xen
Kbuild