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David Hildenbrand a960d6642d util/oslib-posix: Support concurrent os_mem_prealloc() invocation 
Add a mutex to protect the SIGBUS case, as we cannot mess concurrently
with the sigbus handler and we have to manage the global variable
sigbus_memset_context. The MADV_POPULATE_WRITE path can run
concurrently.

Note that page_mutex and page_cond are shared between concurrent
invocations, which shouldn't be a problem.

This is a preparation for future virtio-mem prealloc code, which will call
os_mem_prealloc() asynchronously from an iothread when handling guest
requests.

Reviewed-by: Pankaj Gupta <pankaj.gupta@ionos.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20211217134611.31172-7-david@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-01-07 05:19:55 -05:00
..
aio-posix.c
iothread: add aio-max-batch parameter
2021-07-21 13:47:50 +01:00
aio-posix.h
aio-posix: remove idle poll handlers to improve scalability
2020-03-09 16:45:16 +00:00
aio-wait.c
qemu/atomic.h: rename atomic_ to qatomic_
2020-09-23 16:07:44 +01:00
aio-win32.c
iothread: add aio-max-batch parameter
2021-07-21 13:47:50 +01:00
aiocb.c
…
async.c
iothread: add aio-max-batch parameter
2021-07-21 13:47:50 +01:00
atomic64.c
qemu/atomic.h: rename atomic_ to qatomic_
2020-09-23 16:07:44 +01:00
base64.c
nomaintainer: Fix Lesser GPL version number
2020-11-15 17:04:40 +01:00
bitmap.c
qemu/atomic.h: rename atomic_ to qatomic_
2020-09-23 16:07:44 +01:00
bitops.c
…
block-helpers.c
block: move logical block size check function to a common utility function
2020-10-23 13:42:16 +01:00
block-helpers.h
block: move logical block size check function to a common utility function
2020-10-23 13:42:16 +01:00
buffer.c
nomaintainer: Fix Lesser GPL version number
2020-11-15 17:04:40 +01:00
bufferiszero.c
util/bufferiszero: improve avx2 accelerator
2020-04-01 14:24:03 -04:00
cacheflush.c
util/cacheflush: Fix error generated by clang
2021-01-21 13:00:41 +01:00
cacheinfo.c
util: Enhance flush_icache_range with separate data pointer
2021-01-07 05:09:41 -10:00
compatfd.c
util/compatfd.c: use libc signalfd wrapper instead of raw syscall
2021-10-13 10:47:49 +02:00
coroutine-sigaltstack.c
coroutine-sigaltstack: Add SIGUSR2 mutex
2021-01-26 14:36:37 +01:00
coroutine-ucontext.c
Remove the CONFIG_PRAGMA_DIAGNOSTIC_AVAILABLE switch
2020-07-13 11:40:52 +02:00
coroutine-win32.c
…
crc32c.c
…
crc-ccitt.c
util: Add CRC16 (CCITT) calculation routines
2021-01-24 20:10:54 +01:00
cutils.c
cutils: fix memory leak in get_relocated_path()
2021-05-13 18:06:40 +02:00
dbus.c
util: add dbus helper unit
2020-01-06 18:41:32 +04:00
drm.c
util/drm: make portable by avoiding struct dirent d_type
2020-07-13 14:36:10 +01:00
envlist.c
…
error.c
error: make Error **errp const where it is appropriate
2019-12-18 08:36:16 +01:00
event_notifier-posix.c
event_notifier: Set ->initialized earlier in event_notifier_init()
2021-02-16 17:15:39 +01:00
event_notifier-win32.c
…
fdmon-epoll.c
qemu/atomic.h: rename atomic_ to qatomic_
2020-09-23 16:07:44 +01:00
fdmon-io_uring.c
qemu/atomic.h: rename atomic_ to qatomic_
2020-09-23 16:07:44 +01:00
fdmon-poll.c
fdmon-poll: reset npfd when upgrading to fdmon-epoll
2020-09-23 13:45:52 +01:00
fifo8.c
utils/fifo8: change fatal errors from abort() to assert()
2021-02-07 20:38:20 +00:00
filemonitor-inotify.c
nomaintainer: Fix Lesser GPL version number
2020-11-15 17:04:40 +01:00
filemonitor-stub.c
nomaintainer: Fix Lesser GPL version number
2020-11-15 17:04:40 +01:00
getauxval.c
util/getauxval: Porting to FreeBSD getauxval feature
2020-06-26 06:45:29 -04:00
guest-random.c
util/guest-random: Fix size arg to tail memcpy
2021-07-09 18:42:46 +02:00
hbitmap.c
block/dirty-bitmap: improve _next_dirty_area API
2020-03-18 14:03:46 -04:00
hexdump.c
util/hexdump: introduce qemu_hexdump_line()
2020-09-29 02:14:30 -04:00
host-utils.c
host-utils: add 128-bit quotient support to divu128/divs128
2021-10-27 17:10:00 -07:00
id.c
net: Use id_generate() in the network subsystem, too
2021-03-09 21:47:45 +01:00
iov.c
util/iov: make qemu_iovec_init_extended() honest
2021-02-03 08:00:33 -06:00
iova-tree.c
util: Make some iova_tree parameters const
2021-11-02 15:57:21 +01:00
keyval.c
keyval: introduce keyval_parse_into
2021-07-06 08:33:51 +02:00
lockcnt.c
qemu/atomic.h: rename atomic_ to qatomic_
2020-09-23 16:07:44 +01:00
log.c
nomaintainer: Fix Lesser GPL version number
2020-11-15 17:04:40 +01:00
main-loop.c
util/async: add a human-readable name to BHs for debugging
2021-07-05 11:40:32 +01:00
memfd.c
…
meson.build
configure, meson: move more compiler checks to Meson
2021-10-14 09:50:57 +02:00
mmap-alloc.c
Deprecate pmem=on with non-DAX capable backend file
2021-07-06 18:05:16 -04:00
module.c
modules: check arch on qom lookup
2021-07-09 18:20:27 +02:00
notify.c
…
nvdimm-utils.c
Clean up includes
2020-12-10 17:16:44 +01:00
osdep.c
util/osdep: Add qemu_mprotect_rw
2021-06-13 17:42:40 -07:00
oslib-posix.c
util/oslib-posix: Support concurrent os_mem_prealloc() invocation
2022-01-07 05:19:55 -05:00
oslib-win32.c
util/oslib-win32: Fix fatal assertion in qemu_try_memalign
2021-06-19 14:51:51 -07:00
pagesize.c
…
path.c
…
qdist.c
…
qemu-co-shared-resource.c
co-shared-resource: protect with a mutex
2021-06-25 14:24:24 +03:00
qemu-config.c
qemu-config: restore "machine" in qmp_query_command_line_options()
2021-07-22 14:44:47 +02:00
qemu-coroutine-io.c
yield_until_fd_readable: make it work with any AioContect
2019-10-25 14:38:29 +02:00
qemu-coroutine-lock.c
coroutine-lock: Reimplement CoRwlock to fix downgrade bug
2021-03-31 10:44:21 +01:00
qemu-coroutine-sleep.c
coroutine-sleep: introduce qemu_co_sleep
2021-05-21 18:22:33 +01:00
qemu-coroutine.c
qemu/atomic.h: rename atomic_ to qatomic_
2020-09-23 16:07:44 +01:00
qemu-error.c
error: rename error_with_timestamp to message_with_timestamp
2021-02-01 10:50:55 +00:00
qemu-openpty.c
util: Remove redundant checks in the openpty()
2021-09-15 14:42:48 +02:00
qemu-option.c
qemu-option: Allow deleting opts during qemu_opts_foreach()
2021-10-15 16:11:22 +02:00
qemu-print.c
monitor: Use getter/setter functions for cur_mon
2020-10-09 07:08:19 +02:00
qemu-progress.c
util/: fix some comment spelling errors
2020-09-17 20:38:42 +02:00
qemu-sockets.c
build-sys: add HAVE_IPPROTO_MPTCP
2021-09-30 15:30:25 +02:00
qemu-thread-common.h
…
qemu-thread-posix.c
configure, meson: move pthread_setname_np checks to Meson
2021-10-14 09:50:57 +02:00
qemu-thread-win32.c
util: Pass file+line to qemu_rec_mutex_unlock_impl
2021-06-16 15:03:26 +02:00
qemu-timer-common.c
semihosting: Implement SYS_ELAPSED and SYS_TICKFREQ
2021-01-18 10:05:06 +00:00
qemu-timer.c
spapr: rollback 'unplug timeout' for CPU hotunplugs
2021-04-12 12:27:14 +10:00
qht.c
qemu/atomic.h: rename atomic_ to qatomic_
2020-09-23 16:07:44 +01:00
qsp.c
qemu/atomic: Add aligned_{int64,uint64}_t types
2021-07-21 07:45:38 -10:00
range.c
…
rcu.c
rcu: Introduce force_rcu notifier
2021-11-10 13:20:15 +01:00
readline.c
readline: Fix possible array index out of bounds in readline_hist_add()
2021-01-04 11:13:39 +00:00
selfmap.c
util/selfmap: Discard mapping on error
2021-07-26 07:06:49 -10:00
stats64.c
qemu/atomic.h: rename atomic_ to qatomic_
2020-09-23 16:07:44 +01:00
sys_membarrier.c
…
systemd.c
tools: Fix use of fcntl(F_SETFD) during socket activation
2020-05-04 14:54:35 -05:00
thread-pool.c
lockable: replaced locks with lock guard macros where appropriate
2020-05-04 16:07:43 +01:00
throttle.c
Remove superfluous timer_del() calls
2021-01-08 15:13:38 +00:00
timed-average.c
…
trace-events
modules: add tracepoints
2021-07-09 18:20:27 +02:00
trace.h
trace: switch position of headers to what Meson requires
2020-08-21 06:18:24 -04:00
transactions.c
transactions: Invoke clean() after everything else
2021-11-16 09:43:44 +01:00
unicode.c
…
uri.c
util/uri: do not check argument of uri_free()
2021-07-09 12:26:05 +02:00
userfaultfd.c
migration: introduce UFFD-WP low-level interface helpers
2021-02-08 11:19:51 +00:00
uuid.c
…
vfio-helpers.c
util/vfio-helpers: Let qemu_vfio_do_mapping() propagate Error
2021-09-07 09:08:24 +01:00
vhost-user-server.c
util/vhost-user-server: move header to include/
2020-10-23 13:42:16 +01:00
yank.c
yank: Remove dependency on qiochannel
2021-04-01 15:27:44 +04:00