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[Qemu-devel] [PATCH 2/2] ISCSI: call qemu_notify_event() after updating
From: |
Paolo Bonzini |
Subject: |
[Qemu-devel] [PATCH 2/2] ISCSI: call qemu_notify_event() after updating events |
Date: |
Tue, 22 May 2012 14:25:47 +0200 |
From: Ronnie Sahlberg <address@hidden>
Otherwise, If we add an event for -is-writeable but the socket is
already writeable there may be a delay before the event callback
is actually triggered.
Those delays would in particular hurt performance during BIOS boot and
when the GRUB bootloader reads the kernel and initrd.
Signed-off-by: Ronnie Sahlberg <address@hidden>
---
block/iscsi.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/block/iscsi.c b/block/iscsi.c
index d37c4ee..f956824 100644
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -109,6 +109,13 @@ iscsi_set_events(IscsiLun *iscsilun)
(iscsi_which_events(iscsi) & POLLOUT)
? iscsi_process_write : NULL,
iscsi_process_flush, iscsilun);
+
+ /* If we just added the event for writeable we must call
+ and the socket is already writeable the callback might
+ not be invoked until after a short delay unless we call
+ qemu_notify_event().
+ */
+ qemu_notify_event();
}
static void
--
1.7.10.1
- [Qemu-devel] [PULL 1.1 0/2] SCSI patches for 1.1.0-rc3, Paolo Bonzini, 2012/05/22
- [Qemu-devel] [PATCH 1/2] scsi: declare vmstate_info_scsi_requests to be static, Paolo Bonzini, 2012/05/22
- [Qemu-devel] [PATCH 2/2] ISCSI: call qemu_notify_event() after updating events,
Paolo Bonzini <=
- Re: [Qemu-devel] [PULL 1.1 0/2] SCSI patches for 1.1.0-rc3, Paolo Bonzini, 2012/05/25
- Re: [Qemu-devel] [PULL 1.1 0/2] SCSI patches for 1.1.0-rc3, ronnie sahlberg, 2012/05/26
- Re: [Qemu-devel] [PULL 1.1 0/2] SCSI patches for 1.1.0-rc3, Paolo Bonzini, 2012/05/26
- Re: [Qemu-devel] [PULL 1.1 0/2] SCSI patches for 1.1.0-rc3, ronnie sahlberg, 2012/05/26
- Re: [Qemu-devel] [PULL 1.1 0/2] SCSI patches for 1.1.0-rc3, ronnie sahlberg, 2012/05/26
- Re: [Qemu-devel] [PULL 1.1 0/2] SCSI patches for 1.1.0-rc3, ronnie sahlberg, 2012/05/26
- Re: [Qemu-devel] [PULL 1.1 0/2] SCSI patches for 1.1.0-rc3, Paolo Bonzini, 2012/05/28
- Re: [Qemu-devel] [PULL 1.1 0/2] SCSI patches for 1.1.0-rc3, Anthony Liguori, 2012/05/29
- Re: [Qemu-devel] [PULL 1.1 0/2] SCSI patches for 1.1.0-rc3, Paolo Bonzini, 2012/05/29
Re: [Qemu-devel] [PULL 1.1 0/2] SCSI patches for 1.1.0-rc3, Anthony Liguori, 2012/05/29