similar to: [vhost:vhost 6/19] drivers/net/virtio_net.c:2089:19: error: assignment of read-only location '*(ctx + (sizetype)rxq2vq(i))'

This patch try to reduce the number of MSIX irqs required for virtio-net by sharing a MSIX irq for each TX/RX queue pair through channels. If transport support channel, about half of the MSIX irqs were reduced. Cc: Rusty Russell <rusty at rustcorp.com.au> Cc: Michael S. Tsirkin <mst at redhat.com> Signed-off-by: Jason Wang <jasowang at redhat.com> --- drivers/net/virtio_net.c |

This patch try to reduce the number of MSIX irqs required for virtio-net by sharing a MSIX irq for each TX/RX queue pair through channels. If transport support channel, about half of the MSIX irqs were reduced. Cc: Rusty Russell <rusty at rustcorp.com.au> Cc: Michael S. Tsirkin <mst at redhat.com> Signed-off-by: Jason Wang <jasowang at redhat.com> --- drivers/net/virtio_net.c |

With mergeable buffers we never use s/g for rx, so allow specifying context in that case. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- drivers/net/virtio_net.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 6802169..340f737 100644 --- a/drivers/net/virtio_net.c +++

With mergeable buffers we never use s/g for rx, so allow specifying context in that case. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- drivers/net/virtio_net.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 6802169..340f737 100644 --- a/drivers/net/virtio_net.c +++

On Thu, Mar 30, 2017 at 09:26:51AM +0200, Cornelia Huck wrote: > On Wed, 29 Mar 2017 23:48:54 +0300 > "Michael S. Tsirkin" <mst at redhat.com> wrote: > > > With mergeable buffers we never use s/g for rx, > > so allow specifying context in that case. > > > > Signed-off-by: Michael S. Tsirkin <mst at redhat.com> > > --- > >

On Thu, Mar 30, 2017 at 09:26:51AM +0200, Cornelia Huck wrote: > On Wed, 29 Mar 2017 23:48:54 +0300 > "Michael S. Tsirkin" <mst at redhat.com> wrote: > > > With mergeable buffers we never use s/g for rx, > > so allow specifying context in that case. > > > > Signed-off-by: Michael S. Tsirkin <mst at redhat.com> > > --- > >

On Wed, 29 Mar 2017 23:48:54 +0300 "Michael S. Tsirkin" <mst at redhat.com> wrote: > With mergeable buffers we never use s/g for rx, > so allow specifying context in that case. > > Signed-off-by: Michael S. Tsirkin <mst at redhat.com> > --- > drivers/net/virtio_net.c | 15 ++++++++++++++- > 1 file changed, 14 insertions(+), 1 deletion(-) > >

When ring size is small (<32 entries) making buffers smaller means a full ring might not be able to hold enough buffers to fit a single large packet. Make sure a ring full of buffers is large enough to allow at least one packet of max size. Fixes: 2613af0ed18a ("virtio_net: migrate mergeable rx buffers to page frag allocators") Signed-off-by: Michael S. Tsirkin <mst at

When ring size is small (<32 entries) making buffers smaller means a full ring might not be able to hold enough buffers to fit a single large packet. Make sure a ring full of buffers is large enough to allow at least one packet of max size. Fixes: 2613af0ed18a ("virtio_net: migrate mergeable rx buffers to page frag allocators") Signed-off-by: Michael S. Tsirkin <mst at

On Tue, May 30, 2017 at 07:26:37PM +0300, Michael S. Tsirkin wrote: > On Fri, May 26, 2017 at 03:31:33PM -0400, bfields at fieldses.org wrote: > > Looks like the culprit is very likely d85b758f72b0 "virtio_net: fix > > support for small rings". > > > > After that patch, my NFS server VM stops responding to packets after a > > few minutes of testing.

On Tue, May 30, 2017 at 07:26:37PM +0300, Michael S. Tsirkin wrote: > On Fri, May 26, 2017 at 03:31:33PM -0400, bfields at fieldses.org wrote: > > Looks like the culprit is very likely d85b758f72b0 "virtio_net: fix > > support for small rings". > > > > After that patch, my NFS server VM stops responding to packets after a > > few minutes of testing.

When ring size is small (<32 entries) making buffers smaller means a full ring might not be able to hold enough buffers to fit a single large packet. Make sure a ring full of buffers is large enough to allow at least one packet of max size. Fixes: 2613af0ed18a ("virtio_net: migrate mergeable rx buffers to page frag allocators") Signed-off-by: Michael S. Tsirkin <mst at

When ring size is small (<32 entries) making buffers smaller means a full ring might not be able to hold enough buffers to fit a single large packet. Make sure a ring full of buffers is large enough to allow at least one packet of max size. Fixes: 2613af0ed18a ("virtio_net: migrate mergeable rx buffers to page frag allocators") Signed-off-by: Michael S. Tsirkin <mst at

tree: https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git linux-next head: d01047cb281d27bcedbf705089bdd38d86d20b01 commit: a965e977a1038cd738f874b5ee8a16d4fa55c64d [6/19] virtio: add context flag to find vqs config: x86_64-randconfig-x015-201713 (attached as .config) compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901 reproduce: git checkout

tree: https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git linux-next head: d01047cb281d27bcedbf705089bdd38d86d20b01 commit: a965e977a1038cd738f874b5ee8a16d4fa55c64d [6/19] virtio: add context flag to find vqs config: x86_64-randconfig-x015-201713 (attached as .config) compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901 reproduce: git checkout

Hi Maciej, [auto build test ERROR on net-next/master] [also build test ERROR on v4.12-rc1 next-20170512] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Maciek-Fijalkowski/Fix-ERROR-trailing-statements-should-be-on-next-line/20170515-021304 config: x86_64-acpi-redef (attached as .config) compiler:

Hi all I want to upgrade from 4.5-RELEASE to 4.8-STABLE. I cvsup-ed the source tree and then in /usr/src do 'make -j4 buildworld'. But there was an error during make. here is the dump: ... ===> usr.bin/kdump cc -O -pipe -march=pentium -I/usr/src/usr.bin/kdump/../ktrace -I/usr/src/usr.bin cc -O -pipe -march=pentium -I/usr/src/usr.bin/kdump/../ktrace -I/usr/src/usr.bin gzip -cn

On Fri, Jun 02, 2023 at 05:22:06PM +0800, Xuan Zhuo wrote: > Introduce the module param "experiment_premapped" to enable the function > that the virtio-net do dma mapping. > > If that is true, the vq of virtio-net is under the premapped mode. > It just handle the sg with dma_address. And the driver must get the dma > address of the buffer to unmap after get the buffer

This addition converts strlen() calls to strnlen() when the result is compared to a constant. For example, the following: strlen(s) < 5 Becomes: strnlen(s, 5) < 5 That way, we don't have to walk through the entire string. There is the added overhead of maintaining a counter when using strnlen(), but I thought I'd start with the general case. It may make sense to only use this

On Jun 24, 2011, at 12:52 PM, Alasdair Grant wrote: >> Both NetBSD and FreeBSD seems to use older ATPCS ABI standard. >> As I can see it is not supported in LLVM. >> >> Seems that ATPCS is predecessor of AAPCS so I wonder how easy is >> to implement it in LLVM/Clang... >> >> Is it worth efforts? Any thoughts? > > See