From: Michael Roth <mdroth@linux.vnet.ibm.com>
To: qemu-devel@nongnu.org
Cc: qemu-stable@nongnu.org
Subject: [Qemu-devel] [PATCH 09/38] pseries: Fix stalls on hypervisor virtual console
Date: Wed, 25 Sep 2013 07:57:37 -0500 [thread overview]
Message-ID: <1380113886-16845-10-git-send-email-mdroth@linux.vnet.ibm.com> (raw)
In-Reply-To: <1380113886-16845-1-git-send-email-mdroth@linux.vnet.ibm.com>
From: Anton Blanchard <anton@samba.org>
A number of users are reporting stalls when using the pseries
hypervisor virtual console.
A simple test case is to paste 15 or 17 characters at a time
into the console. Pasting 15 characters at a time works fine
but pasting 17 characters hangs for a random amount of time.
Other activity (network, qemu monitor etc) unblocks it.
If qemu-char tries to send more than 16 characters at once,
vty_can_receive returns false. At this point we have to
wait for the guest to consume that output. Everything is good
so far.
The problem occurs when the the guest does consume the output.
We need to signal back to the qemu-char layer that we are
ready for more input. Without this we block until something
else kicks us (eg network activity).
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
(cherry picked from commit 7770b6f78a2d655e03852a5de238f5926c92be6a)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
---
hw/char/spapr_vty.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/hw/char/spapr_vty.c b/hw/char/spapr_vty.c
index a799721..9c2aef8 100644
--- a/hw/char/spapr_vty.c
+++ b/hw/char/spapr_vty.c
@@ -47,6 +47,8 @@ static int vty_getchars(VIOsPAPRDevice *sdev, uint8_t *buf, int max)
buf[n++] = dev->buf[dev->out++ % VTERM_BUFSIZE];
}
+ qemu_chr_accept_input(dev->chardev);
+
return n;
}
--
1.7.9.5
next prev parent reply other threads:[~2013-09-25 12:58 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-25 12:57 [Qemu-devel] Patch Round-up for stable 1.6.1, freeze on 2013-09-30 Michael Roth
2013-09-25 12:57 ` [Qemu-devel] [PATCH 01/38] block: ensure bdrv_drain_all() works during bdrv_delete() Michael Roth
2013-09-25 12:57 ` [Qemu-devel] [PATCH 02/38] gdbstub: Fix gdb_register_coprocessor() register counting Michael Roth
2013-09-25 12:57 ` [Qemu-devel] [PATCH 03/38] target-ppc: fix bit extraction for FPBF and FPL Michael Roth
2013-09-25 12:57 ` [Qemu-devel] [PATCH 04/38] rdma: silly ipv6 bugfix Michael Roth
2013-09-25 12:57 ` [Qemu-devel] [PATCH 05/38] scripts/qapi.py: Avoid syntax not supported by Python 2.4 Michael Roth
2013-09-25 12:57 ` [Qemu-devel] [PATCH 06/38] usb/dev-hid: Modified usb-tablet category from Misc to Input Michael Roth
2013-09-25 12:57 ` [Qemu-devel] [PATCH 07/38] scsi: Fix scsi_bus_legacy_add_drive() scsi-generic with serial Michael Roth
2013-09-25 12:57 ` [Qemu-devel] [PATCH 08/38] pc: fix regression for 64 bit PCI memory Michael Roth
2013-09-25 12:57 ` Michael Roth [this message]
2013-09-25 12:57 ` [Qemu-devel] [PATCH 10/38] virtio: virtqueue_get_avail_bytes: fix desc_pa when loop over the indirect descriptor table Michael Roth
2013-09-25 12:57 ` [Qemu-devel] [PATCH 11/38] xhci: fix endpoint interval calculation Michael Roth
2013-09-25 13:41 ` Gerd Hoffmann
2013-09-25 12:57 ` [Qemu-devel] [PATCH 12/38] Revert "usb-hub: report status changes only once" Michael Roth
2013-09-25 12:57 ` [Qemu-devel] [PATCH 13/38] block: expect errors from bdrv_co_is_allocated Michael Roth
2013-09-25 21:27 ` [Qemu-devel] [Qemu-stable] " Doug Goldstein
2013-09-26 20:51 ` Paolo Bonzini
2013-09-25 12:57 ` [Qemu-devel] [PATCH 14/38] target-i386: fix disassembly with PAE=1, PG=0 Michael Roth
2013-09-25 12:57 ` [Qemu-devel] [PATCH 15/38] adlib: sort offsets in portio registration Michael Roth
2013-09-25 12:57 ` [Qemu-devel] [PATCH 16/38] exec: fix writing to MMIO area with non-power-of-two length Michael Roth
2013-09-25 12:57 ` [Qemu-devel] [PATCH 17/38] virtio_pci: fix level interrupts with irqfd Michael Roth
2013-09-25 12:57 ` [Qemu-devel] [PATCH 18/38] exec: always use MADV_DONTFORK Michael Roth
2013-09-25 12:57 ` [Qemu-devel] [PATCH 19/38] xhci: reset port when disabling slot Michael Roth
2013-09-25 12:57 ` [Qemu-devel] [PATCH 20/38] usb: parallelize usb3 streams Michael Roth
2013-09-25 12:57 ` [Qemu-devel] [PATCH 21/38] w32: Fix access to host devices (regression) Michael Roth
2013-09-25 12:57 ` [Qemu-devel] [PATCH 22/38] memory: Provide separate handling of unassigned io ports accesses Michael Roth
2013-09-25 12:57 ` [Qemu-devel] [PATCH 23/38] Revert "memory: Return -1 again on reads from unsigned regions" Michael Roth
2013-09-25 12:57 ` [Qemu-devel] [PATCH 24/38] exec: check offset_within_address_space for register subpage Michael Roth
2013-09-25 12:57 ` [Qemu-devel] [PATCH 25/38] ne2000: mark I/O as LITTLE_ENDIAN Michael Roth
2013-09-25 12:57 ` [Qemu-devel] [PATCH 26/38] ehci: save device pointer in EHCIState Michael Roth
2013-09-25 12:57 ` [Qemu-devel] [PATCH 27/38] qxl: fix local renderer Michael Roth
2013-09-25 12:57 ` [Qemu-devel] [PATCH 28/38] pc: Initializing ram_memory under Xen Michael Roth
2013-09-25 12:57 ` [Qemu-devel] [PATCH 29/38] pc_q35: Initialize Xen Michael Roth
2013-09-25 12:57 ` [Qemu-devel] [PATCH 30/38] qapi-types.py: Fix enum struct sizes on i686 Michael Roth
2013-09-25 12:57 ` [Qemu-devel] [PATCH 31/38] pcnet-pci: mark I/O and MMIO as LITTLE_ENDIAN Michael Roth
2013-09-25 12:58 ` [Qemu-devel] [PATCH 32/38] chardev: fix pty_chr_timer Michael Roth
2013-09-25 12:58 ` [Qemu-devel] [PATCH 33/38] kvmvapic: Catch invalid ROM size Michael Roth
2013-09-25 12:58 ` [Qemu-devel] [PATCH 34/38] kvmvapic: Enter inactive state on hardware reset Michael Roth
2013-09-25 12:58 ` [Qemu-devel] [PATCH 35/38] kvmvapic: Clear also physical ROM address when entering INACTIVE state Michael Roth
2013-09-25 12:58 ` [Qemu-devel] [PATCH 36/38] tci: Fix qemu-alpha on 32 bit hosts (wrong assertions) Michael Roth
2013-09-25 12:58 ` [Qemu-devel] [PATCH 37/38] blockdev: do not default cache.no-flush to true Michael Roth
2013-09-25 12:58 ` [Qemu-devel] [PATCH 38/38] virtio-blk: do not relay a previous driver's WCE configuration to the current Michael Roth
2013-09-25 13:54 ` [Qemu-devel] [Qemu-stable] Patch Round-up for stable 1.6.1, freeze on 2013-09-30 Cole Robinson
2013-09-25 21:43 ` Doug Goldstein
2013-09-26 20:53 ` Paolo Bonzini
2013-09-26 4:53 ` [Qemu-devel] " Stefan Weil
2013-09-26 5:22 ` Fam Zheng
2013-09-26 19:38 ` Stefan Weil
2013-09-27 7:30 ` Michael Tokarev
2013-09-27 8:07 ` [Qemu-devel] [Qemu-stable] " Michael Tokarev
2013-09-27 8:11 ` Michael Tokarev
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