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| author | Peter Maydell <peter.maydell@linaro.org> | 2020-02-24 11:38:54 +0000 |
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| committer | Peter Maydell <peter.maydell@linaro.org> | 2020-02-24 11:38:54 +0000 |
| commit | c1e667d2598b9b3ce62b8e89ed22dd38dfe9f57f (patch) | |
| tree | f1b363f20bcd080b9a3c822253d1af9b5c799881 /exec.c | |
| parent | 88e2b97aa3e369a454c9d8360afddc348070c708 (diff) | |
| parent | e5c59355ae9f724777c61c859292ec9db2c8c2ab (diff) | |
| download | focaccia-qemu-c1e667d2598b9b3ce62b8e89ed22dd38dfe9f57f.tar.gz focaccia-qemu-c1e667d2598b9b3ce62b8e89ed22dd38dfe9f57f.zip | |
Merge remote-tracking branch 'remotes/stefanha/tags/block-pull-request' into staging
Pull request This pull request contains a virtio-blk/scsi performance optimization, event loop scalability improvements, and a qtest-based device fuzzing framework. I am including the fuzzing patches because I have reviewed them and Thomas Huth is currently away on leave. # gpg: Signature made Sat 22 Feb 2020 08:50:05 GMT # gpg: using RSA key 8695A8BFD3F97CDAAC35775A9CA4ABB381AB73C8 # gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>" [full] # gpg: aka "Stefan Hajnoczi <stefanha@gmail.com>" [full] # Primary key fingerprint: 8695 A8BF D3F9 7CDA AC35 775A 9CA4 ABB3 81AB 73C8 * remotes/stefanha/tags/block-pull-request: (31 commits) fuzz: add documentation to docs/devel/ fuzz: add virtio-scsi fuzz target fuzz: add virtio-net fuzz target fuzz: add i440fx fuzz targets fuzz: add configure flag --enable-fuzzing fuzz: add target/fuzz makefile rules fuzz: add support for qos-assisted fuzz targets fuzz: support for fork-based fuzzing. main: keep rcu_atfork callback enabled for qtest exec: keep ram block across fork when using qtest fuzz: add fuzzer skeleton libqos: move useful qos-test funcs to qos_external libqos: split qos-test and libqos makefile vars libqos: rename i2c_send and i2c_recv qtest: add in-process incoming command handler libqtest: make bufwrite rely on the TransportOps libqtest: add a layer of abstraction to send/recv qtest: add qtest_server_send abstraction fuzz: add FUZZ_TARGET module type module: check module wasn't already initialized ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'exec.c')
| -rw-r--r-- | exec.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/exec.c b/exec.c index 8e9cc3b47c..c930040f83 100644 --- a/exec.c +++ b/exec.c @@ -35,6 +35,7 @@ #include "sysemu/kvm.h" #include "sysemu/sysemu.h" #include "sysemu/tcg.h" +#include "sysemu/qtest.h" #include "qemu/timer.h" #include "qemu/config-file.h" #include "qemu/error-report.h" @@ -2305,8 +2306,15 @@ static void ram_block_add(RAMBlock *new_block, Error **errp, bool shared) if (new_block->host) { qemu_ram_setup_dump(new_block->host, new_block->max_length); qemu_madvise(new_block->host, new_block->max_length, QEMU_MADV_HUGEPAGE); - /* MADV_DONTFORK is also needed by KVM in absence of synchronous MMU */ - qemu_madvise(new_block->host, new_block->max_length, QEMU_MADV_DONTFORK); + /* + * MADV_DONTFORK is also needed by KVM in absence of synchronous MMU + * Configure it unless the machine is a qtest server, in which case + * KVM is not used and it may be forked (eg for fuzzing purposes). + */ + if (!qtest_enabled()) { + qemu_madvise(new_block->host, new_block->max_length, + QEMU_MADV_DONTFORK); + } ram_block_notify_add(new_block->host, new_block->max_length); } } |