Demi Marie Obenour c76d96c555 xen: speed up grant-table reclaim ... commit c04e989484 upstream. When a grant entry is still in use by the remote domain, Linux must put it on a deferred list. Normally, this list is very short, because the PV network and block protocols expect the backend to unmap the grant first. However, Qubes OS's GUI protocol is subject to the constraints of the X Window System, and as such winds up with the frontend unmapping the window first. As a result, the list can grow very large, resulting in a massive memory leak and eventual VM freeze. To partially solve this problem, make the number of entries that the VM will attempt to free at each iteration tunable. The default is still 10, but it can be overridden via a module parameter. This is Cc: stable because (when combined with appropriate userspace changes) it fixes a severe performance and stability problem for Qubes OS users. Cc: stable@vger.kernel.org Signed-off-by: Demi Marie Obenour <demi@invisiblethingslab.com> Reviewed-by: Juergen Gross <jgross@suse.com> Link: https://lore.kernel.org/r/20230726165354.1252-1-demi@invisiblethingslab.com Signed-off-by: Juergen Gross <jgross@suse.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-08-03 10:26:09 +02:00
..
events
xen-pciback	xen/pciback: don't call pcistub_device_put() under lock	2023-04-24 07:27:10 +02:00
xenbus	xenbus: check xen_domain in xenbus_probe_initcall	2023-08-03 10:25:58 +02:00
xenfs	xen: remove unnecessary (void*) conversions	2023-03-16 12:04:00 +01:00
acpi.c
arm-device.c
balloon.c	xen: simplify sysctl registration for balloon	2023-04-13 11:49:20 -07:00
biomerge.c
cpu_hotplug.c
dbgp.c
efi.c
evtchn.c
features.c
gntalloc.c
gntdev-common.h
gntdev-dmabuf.c
gntdev-dmabuf.h
gntdev.c
grant-dma-iommu.c
grant-dma-ops.c	xen/virtio: Fix NULL deref when a bridge of PCI root bus has no parent	2023-07-23 13:53:36 +02:00
grant-table.c	xen: speed up grant-table reclaim	2023-08-03 10:26:09 +02:00
Kconfig
Makefile
manage.c
mcelog.c
mem-reservation.c
pci.c
pcpu.c	ACPI: processor: Fix evaluating _PDC method when running as Xen dom0	2023-03-22 19:36:31 +01:00
platform-pci.c
privcmd-buf.c
privcmd.c
privcmd.h
pvcalls-back.c	xen/pvcalls-back: fix double frees with pvcalls_new_active_socket()	2023-05-24 17:25:43 +02:00
pvcalls-front.c	xen/pvcalls: don't call bind_evtchn_to_irqhandler() under lock	2023-04-24 07:27:10 +02:00
pvcalls-front.h
swiotlb-xen.c
sys-hypervisor.c
time.c
unpopulated-alloc.c
xen-acpi-pad.c
xen-acpi-processor.c
xen-balloon.c
xen-front-pgdir-shbuf.c
xen-scsiback.c	xen: branch for v6.4-rc1	2023-04-27 17:27:06 -07:00
xlate_mmu.c