* [Qemu-devel] [PATCH v2] async: aio_context_new(): Handle event_notifier_init failure
@ 2014-09-16 9:06 Chrysostomos Nanakos
2014-09-16 9:06 ` Chrysostomos Nanakos
0 siblings, 1 reply; 8+ messages in thread
From: Chrysostomos Nanakos @ 2014-09-16 9:06 UTC (permalink / raw)
To: qemu-devel
Cc: kwolf, Chrysostomos Nanakos, pingfank, famz, benoit, jan.kiszka,
stefanha, mjt, kroosec, sw, pbonzini, afaerber, aliguori
v1->v2
------
* aio_context_new() returns NULL if the initialization of event notifier fails.
* Add descriptive error messages if aio_context_new() and event_notifier_init()
fail.
* Fix gpollfds leak.
Chrysostomos Nanakos (1):
async: aio_context_new(): Handle event_notifier_init failure
async.c | 17 ++++++++++++-----
include/block/aio.h | 2 +-
include/qemu/main-loop.h | 2 +-
iothread.c | 10 +++++++++-
main-loop.c | 9 +++++++--
qemu-img.c | 11 ++++++++++-
qemu-io.c | 10 +++++++++-
qemu-nbd.c | 12 +++++++++---
tests/test-aio.c | 10 +++++++++-
tests/test-thread-pool.c | 10 +++++++++-
tests/test-throttle.c | 10 +++++++++-
vl.c | 7 +++++--
12 files changed, 90 insertions(+), 20 deletions(-)
--
1.7.10.4
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Qemu-devel] [PATCH v2] async: aio_context_new(): Handle event_notifier_init failure
2014-09-16 9:06 [Qemu-devel] [PATCH v2] async: aio_context_new(): Handle event_notifier_init failure Chrysostomos Nanakos
@ 2014-09-16 9:06 ` Chrysostomos Nanakos
2014-09-16 13:53 ` Benoît Canet
0 siblings, 1 reply; 8+ messages in thread
From: Chrysostomos Nanakos @ 2014-09-16 9:06 UTC (permalink / raw)
To: qemu-devel
Cc: kwolf, Chrysostomos Nanakos, pingfank, famz, benoit, jan.kiszka,
stefanha, mjt, kroosec, sw, pbonzini, afaerber, aliguori
If event_notifier_init fails QEMU exits without printing
any error information to the user. This commit adds an error
message on failure:
# qemu [...]
qemu: Failed to initialize event notifier: Too many open files in system
qemu: qemu_init_main_loop failed
Signed-off-by: Chrysostomos Nanakos <cnanakos@grnet.gr>
---
async.c | 17 ++++++++++++-----
include/block/aio.h | 2 +-
include/qemu/main-loop.h | 2 +-
iothread.c | 10 +++++++++-
main-loop.c | 9 +++++++--
qemu-img.c | 11 ++++++++++-
qemu-io.c | 10 +++++++++-
qemu-nbd.c | 12 +++++++++---
tests/test-aio.c | 10 +++++++++-
tests/test-thread-pool.c | 10 +++++++++-
tests/test-throttle.c | 10 +++++++++-
vl.c | 7 +++++--
12 files changed, 90 insertions(+), 20 deletions(-)
diff --git a/async.c b/async.c
index a99e7f6..1839754 100644
--- a/async.c
+++ b/async.c
@@ -289,18 +289,25 @@ static void aio_rfifolock_cb(void *opaque)
aio_notify(opaque);
}
-AioContext *aio_context_new(void)
+AioContext *aio_context_new(Error **errp)
{
+ int ret;
AioContext *ctx;
ctx = (AioContext *) g_source_new(&aio_source_funcs, sizeof(AioContext));
+ ret = event_notifier_init(&ctx->notifier, false);
+ if (ret < 0) {
+ g_source_destroy(&ctx->source);
+ error_setg_errno(errp, -ret, "Failed to initialize event notifier");
+ errno = -ret;
+ return NULL;
+ }
+ aio_set_event_notifier(ctx, &ctx->notifier,
+ (EventNotifierHandler *)
+ event_notifier_test_and_clear);
ctx->pollfds = g_array_new(FALSE, FALSE, sizeof(GPollFD));
ctx->thread_pool = NULL;
qemu_mutex_init(&ctx->bh_lock);
rfifolock_init(&ctx->lock, aio_rfifolock_cb, ctx);
- event_notifier_init(&ctx->notifier, false);
- aio_set_event_notifier(ctx, &ctx->notifier,
- (EventNotifierHandler *)
- event_notifier_test_and_clear);
timerlistgroup_init(&ctx->tlg, aio_timerlist_notify, ctx);
return ctx;
diff --git a/include/block/aio.h b/include/block/aio.h
index 4603c0f..f3d5517 100644
--- a/include/block/aio.h
+++ b/include/block/aio.h
@@ -99,7 +99,7 @@ void aio_set_dispatching(AioContext *ctx, bool dispatching);
* They also provide bottom halves, a service to execute a piece of code
* as soon as possible.
*/
-AioContext *aio_context_new(void);
+AioContext *aio_context_new(Error **errp);
/**
* aio_context_ref:
diff --git a/include/qemu/main-loop.h b/include/qemu/main-loop.h
index 6f0200a..62c68c0 100644
--- a/include/qemu/main-loop.h
+++ b/include/qemu/main-loop.h
@@ -42,7 +42,7 @@
*
* In the case of QEMU tools, this will also start/initialize timers.
*/
-int qemu_init_main_loop(void);
+int qemu_init_main_loop(Error **errp);
/**
* main_loop_wait: Run one iteration of the main loop.
diff --git a/iothread.c b/iothread.c
index d9403cf..bd96ae7 100644
--- a/iothread.c
+++ b/iothread.c
@@ -17,6 +17,7 @@
#include "block/aio.h"
#include "sysemu/iothread.h"
#include "qmp-commands.h"
+#include "qemu/error-report.h"
#define IOTHREADS_PATH "/objects"
@@ -63,10 +64,17 @@ static void iothread_instance_finalize(Object *obj)
static void iothread_complete(UserCreatable *obj, Error **errp)
{
+ Error *local_error = NULL;
IOThread *iothread = IOTHREAD(obj);
iothread->stopping = false;
- iothread->ctx = aio_context_new();
+ iothread->ctx = aio_context_new(&local_error);
+ if (!iothread->ctx) {
+ error_report("%s", error_get_pretty(local_error));
+ error_report("Failed to create AIO context");
+ error_free(local_error);
+ exit(1);
+ }
iothread->thread_id = -1;
qemu_mutex_init(&iothread->init_done_lock);
diff --git a/main-loop.c b/main-loop.c
index 3cc79f8..40c0afa 100644
--- a/main-loop.c
+++ b/main-loop.c
@@ -126,10 +126,11 @@ void qemu_notify_event(void)
static GArray *gpollfds;
-int qemu_init_main_loop(void)
+int qemu_init_main_loop(Error **errp)
{
int ret;
GSource *src;
+ Error *local_error = NULL;
init_clocks();
@@ -138,8 +139,12 @@ int qemu_init_main_loop(void)
return ret;
}
+ qemu_aio_context = aio_context_new(&local_error);
+ if (!qemu_aio_context) {
+ error_propagate(errp, local_error);
+ return -errno;
+ }
gpollfds = g_array_new(FALSE, FALSE, sizeof(GPollFD));
- qemu_aio_context = aio_context_new();
src = aio_get_g_source(qemu_aio_context);
g_source_attach(src, NULL);
g_source_unref(src);
diff --git a/qemu-img.c b/qemu-img.c
index 91d1ac3..6b15bbf 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -2879,7 +2879,9 @@ int main(int argc, char **argv)
{
const img_cmd_t *cmd;
const char *cmdname;
+ Error *local_error = NULL;
int c;
+ int ret;
static const struct option long_options[] = {
{"help", no_argument, 0, 'h'},
{"version", no_argument, 0, 'v'},
@@ -2893,7 +2895,14 @@ int main(int argc, char **argv)
error_set_progname(argv[0]);
qemu_init_exec_dir(argv[0]);
- qemu_init_main_loop();
+ ret = qemu_init_main_loop(&local_error);
+ if (ret < 0) {
+ error_report("%s", error_get_pretty(local_error));
+ error_report("qemu_init_main_loop failed");
+ error_free(local_error);
+ exit(EXIT_FAILURE);
+ }
+
bdrv_init();
if (argc < 2) {
error_exit("Not enough arguments");
diff --git a/qemu-io.c b/qemu-io.c
index d2ab694..e632d59 100644
--- a/qemu-io.c
+++ b/qemu-io.c
@@ -377,8 +377,10 @@ int main(int argc, char **argv)
{ NULL, 0, NULL, 0 }
};
int c;
+ int ret;
int opt_index = 0;
int flags = BDRV_O_UNMAP;
+ Error *local_error = NULL;
#ifdef CONFIG_POSIX
signal(SIGPIPE, SIG_IGN);
@@ -444,7 +446,13 @@ int main(int argc, char **argv)
exit(1);
}
- qemu_init_main_loop();
+ ret = qemu_init_main_loop(&local_error);
+ if (ret < 0) {
+ error_report("%s", error_get_pretty(local_error));
+ error_report("qemu_init_main_loop failed");
+ error_free(local_error);
+ return ret;
+ }
bdrv_init();
/* initialize commands */
diff --git a/qemu-nbd.c b/qemu-nbd.c
index 9bc152e..ed206ed 100644
--- a/qemu-nbd.c
+++ b/qemu-nbd.c
@@ -498,13 +498,13 @@ int main(int argc, char **argv)
BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF,
&local_err);
if (local_err) {
- errx(EXIT_FAILURE, "Failed to parse detect_zeroes mode: %s",
+ errx(EXIT_FAILURE, "Failed to parse detect_zeroes mode: %s",
error_get_pretty(local_err));
}
if (detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP &&
!(flags & BDRV_O_UNMAP)) {
errx(EXIT_FAILURE, "setting detect-zeroes to unmap is not allowed "
- "without setting discard operation to unmap");
+ "without setting discard operation to unmap");
}
break;
case 'b':
@@ -674,7 +674,13 @@ int main(int argc, char **argv)
snprintf(sockpath, 128, SOCKET_PATH, basename(device));
}
- qemu_init_main_loop();
+ ret = qemu_init_main_loop(&local_err);
+ if (ret < 0) {
+ error_report("%s", error_get_pretty(local_err));
+ error_report("qemu_init_main_loop failed");
+ error_free(local_err);
+ exit(EXIT_FAILURE);
+ }
bdrv_init();
atexit(bdrv_close_all);
diff --git a/tests/test-aio.c b/tests/test-aio.c
index c6a8713..4cb3783 100644
--- a/tests/test-aio.c
+++ b/tests/test-aio.c
@@ -14,6 +14,7 @@
#include "block/aio.h"
#include "qemu/timer.h"
#include "qemu/sockets.h"
+#include "qemu/error-report.h"
static AioContext *ctx;
@@ -810,11 +811,18 @@ static void test_source_timer_schedule(void)
int main(int argc, char **argv)
{
+ Error *local_error;
GSource *src;
init_clocks();
- ctx = aio_context_new();
+ ctx = aio_context_new(&local_error);
+ if (!ctx) {
+ error_report("%s", error_get_pretty(local_error));
+ error_report("Failed to create AIO context");
+ error_free(local_error);
+ exit(1);
+ }
src = aio_get_g_source(ctx);
g_source_attach(src, NULL);
g_source_unref(src);
diff --git a/tests/test-thread-pool.c b/tests/test-thread-pool.c
index f40b7fc..ff6a8b0 100644
--- a/tests/test-thread-pool.c
+++ b/tests/test-thread-pool.c
@@ -4,6 +4,7 @@
#include "block/thread-pool.h"
#include "block/block.h"
#include "qemu/timer.h"
+#include "qemu/error-report.h"
static AioContext *ctx;
static ThreadPool *pool;
@@ -205,10 +206,17 @@ static void test_cancel(void)
int main(int argc, char **argv)
{
int ret;
+ Error *local_error;
init_clocks();
- ctx = aio_context_new();
+ ctx = aio_context_new(&local_error);
+ if (!ctx) {
+ error_report("%s", error_get_pretty(local_error));
+ error_report("Failed to create AIO context");
+ error_free(local_error);
+ exit(1);
+ }
pool = aio_get_thread_pool(ctx);
g_test_init(&argc, &argv, NULL);
diff --git a/tests/test-throttle.c b/tests/test-throttle.c
index 000ae31..7be607a 100644
--- a/tests/test-throttle.c
+++ b/tests/test-throttle.c
@@ -14,6 +14,7 @@
#include <math.h>
#include "block/aio.h"
#include "qemu/throttle.h"
+#include "qemu/error-report.h"
static AioContext *ctx;
static LeakyBucket bkt;
@@ -492,10 +493,17 @@ static void test_accounting(void)
int main(int argc, char **argv)
{
GSource *src;
+ Error *local_error;
init_clocks();
- ctx = aio_context_new();
+ ctx = aio_context_new(&local_error);
+ if (!ctx) {
+ error_report("%s", error_get_pretty(local_error));
+ error_report("Failed to create AIO context");
+ error_free(local_error);
+ exit(1);
+ }
src = aio_get_g_source(ctx);
g_source_attach(src, NULL);
g_source_unref(src);
diff --git a/vl.c b/vl.c
index 5db0d08..1340f6f 100644
--- a/vl.c
+++ b/vl.c
@@ -2968,6 +2968,7 @@ int main(int argc, char **argv, char **envp)
ram_addr_t maxram_size = default_ram_size;
uint64_t ram_slots = 0;
FILE *vmstate_dump_file = NULL;
+ Error *main_loop_err = NULL;
atexit(qemu_run_exit_notifiers);
error_set_progname(argv[0]);
@@ -3998,8 +3999,10 @@ int main(int argc, char **argv, char **envp)
os_daemonize();
- if (qemu_init_main_loop()) {
- fprintf(stderr, "qemu_init_main_loop failed\n");
+ if (qemu_init_main_loop(&main_loop_err)) {
+ error_report("%s", error_get_pretty(main_loop_err));
+ error_report("qemu_init_main_loop failed");
+ error_free(main_loop_err);
exit(1);
}
--
1.7.10.4
^ permalink raw reply related [flat|nested] 8+ messages in thread
* Re: [Qemu-devel] [PATCH v2] async: aio_context_new(): Handle event_notifier_init failure
2014-09-16 9:06 ` Chrysostomos Nanakos
@ 2014-09-16 13:53 ` Benoît Canet
2014-09-16 13:57 ` Paolo Bonzini
0 siblings, 1 reply; 8+ messages in thread
From: Benoît Canet @ 2014-09-16 13:53 UTC (permalink / raw)
To: Chrysostomos Nanakos
Cc: kwolf, pingfank, famz, kroosec, jan.kiszka, mjt, qemu-devel,
stefanha, sw, pbonzini, afaerber, aliguori
> static void iothread_complete(UserCreatable *obj, Error **errp)
> {
> + Error *local_error = NULL;
> IOThread *iothread = IOTHREAD(obj);
>
> iothread->stopping = false;
> - iothread->ctx = aio_context_new();
> + iothread->ctx = aio_context_new(&local_error);
> + if (!iothread->ctx) {
> + error_report("%s", error_get_pretty(local_error));
> + error_report("Failed to create AIO context");
I think reporting one line is sufficient.
You could do something in the vein of.
error_report("Failed to create AIO Context: \'%s\'", error_get_pretty(local_error));
> + exit(1);
Also here I don't know if exiting in the middle of a class initialization
completion function is good taste.
You should ask to someone knowing QOM.
> signal(SIGPIPE, SIG_IGN);
> @@ -444,7 +446,13 @@ int main(int argc, char **argv)
> exit(1);
> }
>
> - qemu_init_main_loop();
> + ret = qemu_init_main_loop(&local_error);
> + if (ret < 0) {
> + error_report("%s", error_get_pretty(local_error));
> + error_report("qemu_init_main_loop failed");
> + error_free(local_error);
> + return ret;
We are in main here.
Should it be exit(something) like above ?
> if (local_err) {
> - errx(EXIT_FAILURE, "Failed to parse detect_zeroes mode: %s",
> + errx(EXIT_FAILURE, "Failed to parse detect_zeroes mode: %s",
> error_get_pretty(local_err));
> }
> if (detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP &&
> !(flags & BDRV_O_UNMAP)) {
> errx(EXIT_FAILURE, "setting detect-zeroes to unmap is not allowed "
> - "without setting discard operation to unmap");
> + "without setting discard operation to unmap");
No cosmetic fixes on parts of the code unmodified by a patch please.
Your editor is probably removing these extra EOL spaces on your behalf. Fix it.
> }
> break;
> case 'b':
> @@ -674,7 +674,13 @@ int main(int argc, char **argv)
> snprintf(sockpath, 128, SOCKET_PATH, basename(device));
> }
>
> - qemu_init_main_loop();
> + ret = qemu_init_main_loop(&local_err);
> + if (ret < 0) {
> + error_report("%s", error_get_pretty(local_err));
> + error_report("qemu_init_main_loop failed");
> + error_free(local_err);
> + exit(EXIT_FAILURE);
> + }
> bdrv_init();
> atexit(bdrv_close_all);
>
> diff --git a/tests/test-aio.c b/tests/test-aio.c
> index c6a8713..4cb3783 100644
> --- a/tests/test-aio.c
> +++ b/tests/test-aio.c
> @@ -14,6 +14,7 @@
> #include "block/aio.h"
> #include "qemu/timer.h"
> #include "qemu/sockets.h"
> +#include "qemu/error-report.h"
>
> static AioContext *ctx;
>
> @@ -810,11 +811,18 @@ static void test_source_timer_schedule(void)
>
> int main(int argc, char **argv)
> {
> + Error *local_error;
> GSource *src;
>
> init_clocks();
>
> - ctx = aio_context_new();
> + ctx = aio_context_new(&local_error);
> + if (!ctx) {
> + error_report("%s", error_get_pretty(local_error));
> + error_report("Failed to create AIO context");
> + error_free(local_error);
> + exit(1);
> + }
> src = aio_get_g_source(ctx);
> g_source_attach(src, NULL);
> g_source_unref(src);
> diff --git a/tests/test-thread-pool.c b/tests/test-thread-pool.c
> index f40b7fc..ff6a8b0 100644
> --- a/tests/test-thread-pool.c
> +++ b/tests/test-thread-pool.c
> @@ -4,6 +4,7 @@
> #include "block/thread-pool.h"
> #include "block/block.h"
> #include "qemu/timer.h"
> +#include "qemu/error-report.h"
>
> static AioContext *ctx;
> static ThreadPool *pool;
> @@ -205,10 +206,17 @@ static void test_cancel(void)
> int main(int argc, char **argv)
> {
> int ret;
> + Error *local_error;
>
> init_clocks();
>
> - ctx = aio_context_new();
> + ctx = aio_context_new(&local_error);
> + if (!ctx) {
> + error_report("%s", error_get_pretty(local_error));
> + error_report("Failed to create AIO context");
> + error_free(local_error);
> + exit(1);
> + }
> pool = aio_get_thread_pool(ctx);
>
> g_test_init(&argc, &argv, NULL);
> diff --git a/tests/test-throttle.c b/tests/test-throttle.c
> index 000ae31..7be607a 100644
> --- a/tests/test-throttle.c
> +++ b/tests/test-throttle.c
> @@ -14,6 +14,7 @@
> #include <math.h>
> #include "block/aio.h"
> #include "qemu/throttle.h"
> +#include "qemu/error-report.h"
>
> static AioContext *ctx;
> static LeakyBucket bkt;
> @@ -492,10 +493,17 @@ static void test_accounting(void)
> int main(int argc, char **argv)
> {
> GSource *src;
> + Error *local_error;
>
> init_clocks();
>
> - ctx = aio_context_new();
> + ctx = aio_context_new(&local_error);
> + if (!ctx) {
> + error_report("%s", error_get_pretty(local_error));
> + error_report("Failed to create AIO context");
> + error_free(local_error);
> + exit(1);
> + }
> src = aio_get_g_source(ctx);
> g_source_attach(src, NULL);
> g_source_unref(src);
> diff --git a/vl.c b/vl.c
> index 5db0d08..1340f6f 100644
> --- a/vl.c
> +++ b/vl.c
> @@ -2968,6 +2968,7 @@ int main(int argc, char **argv, char **envp)
> ram_addr_t maxram_size = default_ram_size;
> uint64_t ram_slots = 0;
> FILE *vmstate_dump_file = NULL;
> + Error *main_loop_err = NULL;
>
> atexit(qemu_run_exit_notifiers);
> error_set_progname(argv[0]);
> @@ -3998,8 +3999,10 @@ int main(int argc, char **argv, char **envp)
>
> os_daemonize();
>
> - if (qemu_init_main_loop()) {
> - fprintf(stderr, "qemu_init_main_loop failed\n");
> + if (qemu_init_main_loop(&main_loop_err)) {
> + error_report("%s", error_get_pretty(main_loop_err));
> + error_report("qemu_init_main_loop failed");
> + error_free(main_loop_err);
> exit(1);
> }
>
> --
> 1.7.10.4
>
>
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [Qemu-devel] [PATCH v2] async: aio_context_new(): Handle event_notifier_init failure
2014-09-16 13:53 ` Benoît Canet
@ 2014-09-16 13:57 ` Paolo Bonzini
2014-09-16 15:43 ` Chrysostomos Nanakos
0 siblings, 1 reply; 8+ messages in thread
From: Paolo Bonzini @ 2014-09-16 13:57 UTC (permalink / raw)
To: Benoît Canet, Chrysostomos Nanakos
Cc: kwolf, pingfank, famz, kroosec, jan.kiszka, mjt, qemu-devel,
stefanha, sw, afaerber, aliguori
Il 16/09/2014 15:53, Benoît Canet ha scritto:
>> static void iothread_complete(UserCreatable *obj, Error **errp)
>> > {
>> > + Error *local_error = NULL;
>> > IOThread *iothread = IOTHREAD(obj);
>> >
>> > iothread->stopping = false;
>> > - iothread->ctx = aio_context_new();
>> > + iothread->ctx = aio_context_new(&local_error);
>> > + if (!iothread->ctx) {
>> > + error_report("%s", error_get_pretty(local_error));
>> > + error_report("Failed to create AIO context");
> I think reporting one line is sufficient.
>
> You could do something in the vein of.
> error_report("Failed to create AIO Context: \'%s\'", error_get_pretty(local_error));
>
>
>> > + exit(1);
> Also here I don't know if exiting in the middle of a class initialization
> completion function is good taste.
> You should ask to someone knowing QOM.
>
Indeed, the right thing to do is simply
error_propagate(errp, local_error);
return;
Paolo
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [Qemu-devel] [PATCH v2] async: aio_context_new(): Handle event_notifier_init failure
2014-09-16 13:57 ` Paolo Bonzini
@ 2014-09-16 15:43 ` Chrysostomos Nanakos
2014-09-16 15:45 ` Paolo Bonzini
0 siblings, 1 reply; 8+ messages in thread
From: Chrysostomos Nanakos @ 2014-09-16 15:43 UTC (permalink / raw)
To: Paolo Bonzini
Cc: Benoît Canet, Chrysostomos Nanakos, pingfank, famz, kroosec,
jan.kiszka, mjt, qemu-devel, stefanha, sw, kwolf, afaerber,
aliguori
On Tue, Sep 16, 2014 at 03:57:25PM +0200, Paolo Bonzini wrote:
> Il 16/09/2014 15:53, Benoît Canet ha scritto:
> >> static void iothread_complete(UserCreatable *obj, Error **errp)
> >> > {
> >> > + Error *local_error = NULL;
> >> > IOThread *iothread = IOTHREAD(obj);
> >> >
> >> > iothread->stopping = false;
> >> > - iothread->ctx = aio_context_new();
> >> > + iothread->ctx = aio_context_new(&local_error);
> >> > + if (!iothread->ctx) {
> >> > + error_report("%s", error_get_pretty(local_error));
> >> > + error_report("Failed to create AIO context");
> > I think reporting one line is sufficient.
> >
> > You could do something in the vein of.
> > error_report("Failed to create AIO Context: \'%s\'", error_get_pretty(local_error));
> >
> >
> >> > + exit(1);
> > Also here I don't know if exiting in the middle of a class initialization
> > completion function is good taste.
> > You should ask to someone knowing QOM.
> >
>
> Indeed, the right thing to do is simply
>
> error_propagate(errp, local_error);
> return;
Just to note that after propagating the error and returning, QEMU fails
silently without printing the error message.
I will make the proposed changes and try to resolve this in the next patch
series if this is possible.
Regards,
Chrysostomos.
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [Qemu-devel] [PATCH v2] async: aio_context_new(): Handle event_notifier_init failure
2014-09-16 15:43 ` Chrysostomos Nanakos
@ 2014-09-16 15:45 ` Paolo Bonzini
2014-09-16 15:50 ` Chrysostomos Nanakos
0 siblings, 1 reply; 8+ messages in thread
From: Paolo Bonzini @ 2014-09-16 15:45 UTC (permalink / raw)
To: Chrysostomos Nanakos
Cc: Benoît Canet, kwolf, pingfank, famz, kroosec, jan.kiszka,
mjt, qemu-devel, stefanha, sw, afaerber, aliguori
Il 16/09/2014 17:43, Chrysostomos Nanakos ha scritto:
>> > error_propagate(errp, local_error);
>> > return;
> Just to note that after propagating the error and returning, QEMU fails
> silently without printing the error message.
What is your testcase?
Paolo
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [Qemu-devel] [PATCH v2] async: aio_context_new(): Handle event_notifier_init failure
2014-09-16 15:45 ` Paolo Bonzini
@ 2014-09-16 15:50 ` Chrysostomos Nanakos
2014-09-16 17:58 ` Chrysostomos Nanakos
0 siblings, 1 reply; 8+ messages in thread
From: Chrysostomos Nanakos @ 2014-09-16 15:50 UTC (permalink / raw)
To: Paolo Bonzini
Cc: Chrysostomos Nanakos, Benoît Canet, pingfank, famz, kroosec,
jan.kiszka, mjt, qemu-devel, stefanha, sw, kwolf, afaerber,
aliguori
On Tue, Sep 16, 2014 at 05:45:16PM +0200, Paolo Bonzini wrote:
> Il 16/09/2014 17:43, Chrysostomos Nanakos ha scritto:
> >> > error_propagate(errp, local_error);
> >> > return;
> > Just to note that after propagating the error and returning, QEMU fails
> > silently without printing the error message.
>
> What is your testcase?
I am starting QEMU with the options below and explicitly set iothread->ctx to
NULL. Is that ok as a testcase or should I reduce my open files limit to
produce the error?
qemu --enable-kvm -smp 2 -m 1024 -object iothread,id=iothread0 -drive file=archipelago:fedora_stable
-vnc 0.0.0.0:0 -qmp tcp:127.0.0.1:8888,server,nowait
No error message, at least the propagated one, fails silently.
Regards,
Chrysostomos.
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [Qemu-devel] [PATCH v2] async: aio_context_new(): Handle event_notifier_init failure
2014-09-16 15:50 ` Chrysostomos Nanakos
@ 2014-09-16 17:58 ` Chrysostomos Nanakos
0 siblings, 0 replies; 8+ messages in thread
From: Chrysostomos Nanakos @ 2014-09-16 17:58 UTC (permalink / raw)
To: Chrysostomos Nanakos
Cc: Benoît Canet, kwolf, pingfank, famz, kroosec, jan.kiszka,
mjt, qemu-devel, stefanha, sw, Paolo Bonzini, afaerber, aliguori
On Tue, Sep 16, 2014 at 06:50:38PM +0300, Chrysostomos Nanakos wrote:
> On Tue, Sep 16, 2014 at 05:45:16PM +0200, Paolo Bonzini wrote:
> > Il 16/09/2014 17:43, Chrysostomos Nanakos ha scritto:
> > >> > error_propagate(errp, local_error);
> > >> > return;
> > > Just to note that after propagating the error and returning, QEMU fails
> > > silently without printing the error message.
> >
> > What is your testcase?
>
> I am starting QEMU with the options below and explicitly set iothread->ctx to
> NULL. Is that ok as a testcase or should I reduce my open files limit to
> produce the error?
>
> qemu --enable-kvm -smp 2 -m 1024 -object iothread,id=iothread0 -drive file=archipelago:fedora_stable
> -vnc 0.0.0.0:0 -qmp tcp:127.0.0.1:8888,server,nowait
>
> No error message, at least the propagated one, fails silently.
>
The segfault is caused when QOM tries to object_unref() the iothread object,
type->instance_finalize(obj) is called which calls the registered
iothread_instance_finalize function. A check there for the iothread->ctx
seems to solve the problem.
I will include the fix in the next patch series.
Regards,
Chrysostomos.
^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2014-09-16 17:59 UTC | newest]
Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2014-09-16 9:06 [Qemu-devel] [PATCH v2] async: aio_context_new(): Handle event_notifier_init failure Chrysostomos Nanakos
2014-09-16 9:06 ` Chrysostomos Nanakos
2014-09-16 13:53 ` Benoît Canet
2014-09-16 13:57 ` Paolo Bonzini
2014-09-16 15:43 ` Chrysostomos Nanakos
2014-09-16 15:45 ` Paolo Bonzini
2014-09-16 15:50 ` Chrysostomos Nanakos
2014-09-16 17:58 ` Chrysostomos Nanakos
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