diff options
| author | Christian Schoenebeck <qemu_oss@crudebyte.com> | 2020-09-06 18:50:32 +0200 |
|---|---|---|
| committer | Christian Schoenebeck <qemu_oss@crudebyte.com> | 2020-09-15 12:12:03 +0200 |
| commit | c418f935ac6aed9aa1dc0ceb4b19044a9b7b7968 (patch) | |
| tree | e4ac892b028604758c487ab5276050ea9f772f5b /hw | |
| parent | 62777d825ba6a7f9ba749588a9e1e7b273f7e967 (diff) | |
| download | qemu-c418f935ac6aed9aa1dc0ceb4b19044a9b7b7968.zip | |
9pfs: disable msize warning for synth driver
Previous patch introduced a performance warning being logged on host
side if client connected with an 'msize' <= 8192. Disable this
performance warning for the synth driver to prevent that warning from
being printed whenever the 9pfs (qtest) test cases are running.
Introduce a new export flag V9FS_NO_PERF_WARN for that purpose, which
might also be used to disable such warnings from the CLI in future.
We could have also prevented the warning by simply raising P9_MAX_SIZE
in virtio-9p-test.c to any value larger than 8192, however in the
context of test cases it makes sense running for edge cases, which
includes the lowest 'msize' value supported by the server which is
4096, hence we want to preserve an msize of 4096 for the test client.
Signed-off-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
Reviewed-by: Greg Kurz <groug@kaod.org>
Message-Id: <E1kEyDy-0006nN-5A@lizzy.crudebyte.com>
Signed-off-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/9pfs/9p-synth.c | 2 | ||||
| -rw-r--r-- | hw/9pfs/9p.c | 2 |
2 files changed, 3 insertions, 1 deletions
diff --git a/hw/9pfs/9p-synth.c b/hw/9pfs/9p-synth.c index 7eb210ffa8..cec8c0eefc 100644 --- a/hw/9pfs/9p-synth.c +++ b/hw/9pfs/9p-synth.c @@ -541,6 +541,8 @@ static int synth_init(FsContext *ctx, Error **errp) QLIST_INIT(&synth_root.child); qemu_mutex_init(&synth_mutex); + ctx->export_flags |= V9FS_NO_PERF_WARN; + /* Add "." and ".." entries for root */ v9fs_add_dir_node(&synth_root, synth_root.attr->mode, "..", synth_root.attr, synth_root.attr->inode); diff --git a/hw/9pfs/9p.c b/hw/9pfs/9p.c index 99b6f24fd6..741d222c3f 100644 --- a/hw/9pfs/9p.c +++ b/hw/9pfs/9p.c @@ -1354,7 +1354,7 @@ static void coroutine_fn v9fs_version(void *opaque) } /* 8192 is the default msize of Linux clients */ - if (s->msize <= 8192) { + if (s->msize <= 8192 && !(s->ctx.export_flags & V9FS_NO_PERF_WARN)) { warn_report_once( "9p: degraded performance: a reasonable high msize should be " "chosen on client/guest side (chosen msize is <= 8192). See " |