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authorChristian Schoenebeck <qemu_oss@crudebyte.com>2020-09-06 18:50:32 +0200
committerChristian Schoenebeck <qemu_oss@crudebyte.com>2020-09-15 12:12:03 +0200
commitc418f935ac6aed9aa1dc0ceb4b19044a9b7b7968 (patch)
treee4ac892b028604758c487ab5276050ea9f772f5b /hw/9pfs/9p.c
parent62777d825ba6a7f9ba749588a9e1e7b273f7e967 (diff)
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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/9pfs/9p.c')
-rw-r--r--hw/9pfs/9p.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/hw/9pfs/9p.c b/hw/9pfs/9p.c
index 99b6f24..741d222 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 "