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qemu-cr16/include/sysemu
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Fiona Ebner 03e471c41d qemu_init: increase NOFILE soft limit on POSIX 
In many configurations, e.g. multiple vNICs with multiple queues or
with many Ceph OSDs, the default soft limit of 1024 is not enough.
QEMU is supposed to work fine with file descriptors >= 1024 and does
not use select() on POSIX. Bump the soft limit to the allowed hard
limit to avoid issues with the aforementioned configurations.

Of course the limit could be raised from the outside, but the man page
of systemd.exec states about 'LimitNOFILE=':

> Don't use.
> [...]
> Typically applications should increase their soft limit to the hard
> limit on their own, if they are OK with working with file
> descriptors above 1023,

If the soft limit is already the same as the hard limit, avoid the
superfluous setrlimit call. This can avoid a warning with a strict
seccomp filter blocking setrlimit if NOFILE was already raised before
executing QEMU.

Buglink: https://bugzilla.proxmox.com/show_bug.cgi?id=4507
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
2024-02-09 12:47:58 +00:00
..
accel-blocker.h bulk: Do not declare function prototypes using 'extern' keyword 2023-08-31 19:47:43 +02:00
accel-ops.h accel: Introduce cpu_exec_reset_hold() 2023-11-07 12:13:27 +01:00
arch_init.h hw/loongarch: Add support loongson3 virt machine type. 2022-06-06 18:09:03 +00:00
balloon.h
block-backend-common.h block: drain from main loop thread in bdrv_co_yield_to_drain() 2023-05-30 17:32:02 +02:00
block-backend-global-state.h block: Mark bdrv_first_blk() and bdrv_is_root_node() GRAPH_RDLOCK 2023-10-12 16:31:33 +02:00
block-backend-io.h util/defer-call: move defer_call() to util/ 2023-10-31 15:41:42 +01:00
block-backend.h include/sysemu/block-backend: split header into I/O and global state (GS) API 2022-03-04 18:18:25 +01:00
block-ram-registrar.h block: add BlockRAMRegistrar 2022-10-26 14:56:42 -04:00
blockdev.h include/sysemu/blockdev.h: global state API 2022-03-04 18:18:25 +01:00
cpu-throttle.h
cpu-timers-internal.h system: Rename softmmu/ directory as system/ 2023-10-08 21:08:08 +02:00
cpu-timers.h system/replay: Restrict icount to system emulation 2024-01-19 12:28:59 +01:00
cpus.h cpus: Remove unused smp_cores/smp_threads declarations 2023-10-12 00:37:39 +03:00
cryptodev-vhost-user.h
cryptodev-vhost.h include/: spelling fixes 2023-09-08 13:08:52 +03:00
cryptodev.h include/: spelling fixes 2023-09-08 13:08:52 +03:00
device_tree.h sysemu/device_tree: Clean up local variable shadowing 2023-09-29 10:07:16 +02:00
dirtylimit.h migration: Extend query-migrate to provide dirty page limit info 2023-07-26 10:55:56 +02:00
dirtyrate.h include: Include headers where needed 2023-01-08 01:54:22 -05:00
dma.h hw/dma: Let dma_buf_read() / dma_buf_write() propagate MemTxResult 2022-01-18 12:56:29 +01:00
dump-arch.h dump: Add arch cleanup function 2023-11-14 10:42:32 +01:00
dump.h dump: Allow directly outputting raw kdump format 2023-11-02 18:05:02 +04:00
event-loop-base.h Don't include headers already included by qemu/osdep.h 2023-02-08 07:28:05 +01:00
hostmem.h backends: Have HostMemoryBackendClass::alloc() handler return a boolean 2024-01-05 16:20:15 +01:00
hvf.h sysemu/kvm: Restrict hvf_get_supported_cpuid() to x86 targets 2023-10-07 19:02:32 +02:00
hvf_int.h accel: Rename HVF 'struct hvf_vcpu_state' -> AccelCPUState 2023-06-28 14:14:22 +02:00
hw_accel.h accel: Remove HAX accelerator 2023-08-31 19:46:43 +02:00
iommufd.h backends/iommufd: Remove mutex 2024-01-05 21:25:20 +01:00
iothread.h include/: spelling fixes 2023-09-08 13:08:52 +03:00
kvm.h sysemu/kvm: Restrict kvmppc_get_radix_page_info() to ppc targets 2023-11-07 12:13:28 +01:00
kvm_int.h Add class property to configure KVM device node to use 2024-01-18 10:43:14 +01:00
kvm_xen.h hw/xen: select kernel mode for per-vCPU event channel upcall vector 2023-11-06 10:03:45 +00:00
memory_mapping.h memory: follow Error API guidelines 2023-10-19 23:13:27 +02:00
numa.h
nvmm.h accel: Document generic accelerator headers 2023-06-28 13:55:35 +02:00
os-posix.h qemu_init: increase NOFILE soft limit on POSIX 2024-02-09 12:47:58 +00:00
os-win32.h qemu_init: increase NOFILE soft limit on POSIX 2024-02-09 12:47:58 +00:00
qtest.h system/qtest: Restrict QTest API to system emulation 2023-12-20 10:29:23 +01:00
replay.h system/replay: Restrict icount to system emulation 2024-01-19 12:28:59 +01:00
reset.h reset: allow registering handlers that aren't called by snapshot loading 2022-10-27 11:34:31 +01:00
rng-random.h
rng.h
rtc.h rtc: Use time_t for passing and returning time offsets 2023-08-31 09:45:18 +01:00
runstate-action.h system: Rename softmmu/ directory as system/ 2023-10-08 21:08:08 +02:00
runstate.h cpus: vm_resume 2024-01-04 09:52:42 +08:00
seccomp.h
stats.h include/: spelling fixes 2023-09-08 13:08:52 +03:00
sysemu.h softmmu: pass the main loop status to gdb "Wxx" packet 2023-10-12 12:33:24 +10:00
tcg.h accel: Document generic accelerator headers 2023-06-28 13:55:35 +02:00
tpm.h sysemu/tpm: Clean up global variable shadowing 2023-10-06 13:27:48 +02:00
tpm_backend.h include/: spelling fixes 2023-09-08 13:08:52 +03:00
tpm_util.h
vhost-user-backend.h
watchdog.h watchdog: remove -watchdog option 2022-09-29 11:40:28 +02:00
whpx.h accel: Document generic accelerator headers 2023-06-28 13:55:35 +02:00
xen-mapcache.h
xen.h accel: Document generic accelerator headers 2023-06-28 13:55:35 +02:00