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Filename Latest commit message Latest commit date
Sean Christopherson 5d6317ca4e KVM: x86/mmu: Voluntarily reschedule as needed when zapping all sptes
Call cond_resched_lock() when zapping all sptes to reschedule if needed
or to release and reacquire mmu_lock in case of contention.  There is no
need to flush or zap when temporarily dropping mmu_lock as zapping all
sptes is done only when the owning userspace VMM has exited or when the
VM is being destroyed, i.e. there is no interplay with memslots or MMIO
generations to worry about.

Be paranoid and restart the walk if mmu_lock is dropped to avoid any
potential issues with consuming a stale iterator.  The overhead in doing
so is negligible as at worst there will be a few root shadow pages at
the head of the list, i.e. the iterator is essentially the head of the
list already.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2019-02-20 22:48:46 +01:00
arch KVM: x86/mmu: Voluntarily reschedule as needed when zapping all sptes 2019-02-20 22:48:46 +01:00
block for-linus-20190209 2019-02-09 10:26:09 -08:00
certs
crypto
Documentation Revert "KVM: MMU: document fast invalidate all pages" 2019-02-20 22:48:39 +01:00
drivers dmaengine-fix-5.0-rc6 2019-02-10 10:39:37 -08:00
firmware
fs for-linus-20190209 2019-02-09 10:26:09 -08:00
include KVM: Move the memslot update in-progress flag to bit 63 2019-02-20 22:48:37 +01:00
init
ipc
kernel Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-02-10 09:48:18 -08:00
lib
LICENSES
mm
net
samples
scripts
security
sound
tools selftests: kvm: add selftest for releasing VM file descriptor while in L2 2019-02-12 13:12:12 +01:00
usr
virt KVM: Move the memslot update in-progress flag to bit 63 2019-02-20 22:48:37 +01:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2019-02-09 13:43:12 -08:00
Makefile Linux 5.0-rc6 2019-02-10 14:42:20 -08:00
README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.