arlier and return error in case of misoperation.
Signed-off-by: sochin jiang
---
block/mirror.c | 6 ++
1 file changed, 6 insertions(+)
diff --git a/block/mirror.c b/block/mirror.c
index 301ba92..3476696 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -1038,6 +1038,12 @@ void mirror_s
Hi, guys,
Recently, I encountered an IO hang problem in occasion which I cannot
reproduce it now.
I analyzed this problem carefully, the critical stack is as following:
After reading the codes in linux-aio.c(see ioq_submit() function), I found two
situations could lead us here.
1) no AIO
blk_io_limits_disable, leaves draining operation to
blk_remove_bs in case that there is no BDS inserted. Futhermore, make sure
throttle timers are initialized or attached before throttle_timers_destroy
is called in throttle_group_unregister_tgm.
Signed-off-by: sochin jiang
---
block/block-backend.c
On 2018/1/8 18:10, Greg Kurz wrote:
> On Tue, 19 Dec 2017 13:41:12 +0800
> sochin.jiang wrote:
>
>> Hi, guys.
>>
>> I'm looking for the hot-plug/unplug features of virtio-9p device
>> recently, and found there's a lack of support.
>>
>> I am wondering why ? Is there a reason. Actua
Hi, guys.
I'm looking for the hot-plug/unplug features of virtio-9p device recently,
and found there's a lack of support.
I am wondering why ? Is there a reason. Actually, I write a qmp command to
support fsdev_add, then a device_add qmp will
successfully add a virtio-9p
From: "sochin.jiang"
Till now, we've already notify guest as a batch mostly, an
extra BH won't decrease guest interrupts much, but cause a
significant notification loss. Generally, we could have 15%
or so performance lost in single queue IO models, as I tested.
Signed-off-by: sochin.jiang
-
In fact, I firstly found a performance loss before and after
commit 9ffe337 using fio tools in suse11-sp3 guest(vitio-blk), especially
when testing 4k single IO models(say, write, randwrite, read and
randread, with iodepth set to 1), the result is 15%-20% performance loss
since commit 9ffe337,
From: "sochin.jiang"
Correct a spelling error in prompt message.
Signed-off-by: sochin.jiang
---
scripts/git-submodule.sh | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/scripts/git-submodule.sh b/scripts/git-submodule.sh
index bc7224a..807ca0b 100755
--- a/scripts/git-sub
