892feec221
A vcpu only checks if a rendezvous is in progress or not to decide if it should handle a rendezvous. This could lead to spurios rendezvous where a vcpu tries a handle a rendezvous it isn't part of. This situation is properly handled by vm_handle_rendezvous but it could potentially degrade the performance. Avoid that by an early check if the vcpu is part of the rendezvous or not. At the moment, rendezvous are only used to spin up application processors and to send ioapic interrupts. Spinning up application processors is done in the guest boot phase by sending INIT SIPI sequences to single vcpus. This is known to cause spurious rendezvous and only occurs in the boot phase. Sending ioapic interrupts is rare because modern guest will use msi and the rendezvous is always send to all vcpus. Reviewed by: jhb MFC after: 1 week Sponsored by: Beckhoff Automation GmbH & Co. KG Differential Revision: https://reviews.freebsd.org/D37390 |
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.. | ||
amd64 | ||
arm | ||
arm64 | ||
bsm | ||
cam | ||
cddl | ||
compat | ||
conf | ||
contrib | ||
crypto | ||
ddb | ||
dev | ||
dts | ||
fs | ||
gdb | ||
geom | ||
gnu | ||
i386 | ||
isa | ||
kern | ||
kgssapi | ||
libkern | ||
modules | ||
net | ||
net80211 | ||
netgraph | ||
netinet | ||
netinet6 | ||
netipsec | ||
netlink | ||
netpfil | ||
netsmb | ||
nfs | ||
nfsclient | ||
nfsserver | ||
nlm | ||
ofed | ||
opencrypto | ||
powerpc | ||
riscv | ||
rpc | ||
security | ||
sys | ||
teken | ||
tests | ||
tools | ||
ufs | ||
vm | ||
x86 | ||
xdr | ||
xen | ||
Makefile | ||
README.md |
FreeBSD Kernel Source:
This directory contains the source files and build glue that make up the FreeBSD kernel and its modules, including both original and contributed software.
Kernel configuration files are located in the conf/
subdirectory of each
architecture. GENERIC
is the configuration used in release builds. NOTES
contains documentation of all possible entries. LINT
is a compile-only
configuration used to maximize build coverage and detect regressions.
Source Roadmap:
Directory | Description |
---|---|
amd64 | AMD64 (64-bit x86) architecture support |
arm | 32-bit ARM architecture support |
arm64 | 64-bit ARM (AArch64) architecture support |
cam | Common Access Method storage subsystem - cam(4) and ctl(4) |
cddl | CDDL-licensed optional sources such as DTrace |
conf | kernel build glue |
compat | Linux compatibility layer, FreeBSD 32-bit compatibility |
contrib | 3rd-party imported software such as OpenZFS |
crypto | crypto drivers |
ddb | interactive kernel debugger - ddb(4) |
fs | most filesystems, excluding UFS, NFS, and ZFS |
dev | device drivers |
gdb | kernel remote GDB stub - gdb(4) |
geom | GEOM framework - geom(4) |
i386 | i386 (32-bit x86) architecture support |
kern | main part of the kernel |
libkern | libc-like and other support functions for kernel use |
modules | kernel module infrastructure |
net | core networking code |
net80211 | wireless networking (IEEE 802.11) - net80211(4) |
netgraph | graph-based networking subsystem - netgraph(4) |
netinet | IPv4 protocol implementation - inet(4) |
netinet6 | IPv6 protocol implementation - inet6(4) |
netipsec | IPsec protocol implementation - ipsec(4) |
netpfil | packet filters - ipfw(4) , pf(4) , and ipfilter(4) |
opencrypto | OpenCrypto framework - crypto(7) |
powerpc | PowerPC/POWER (32 and 64-bit) architecture support |
riscv | 64-bit RISC-V architecture support |
security | security facilities - audit(4) and mac(4) |
sys | kernel headers |
tests | kernel unit tests |
ufs | Unix File System - ffs(7) |
vm | virtual memory system |
x86 | code shared by AMD64 and i386 architectures |