similar to: SMAP feature causing kernel alignment faults due to setting EFLAGS.AC

On 2019/1/3 ??4:47, Michael S. Tsirkin wrote: > On Sat, Dec 29, 2018 at 08:46:51PM +0800, Jason Wang wrote: >> This series tries to access virtqueue metadata through kernel virtual >> address instead of copy_user() friends since they had too much >> overheads like checks, spec barriers or even hardware feature >> toggling. > Will review, thanks! > One questions

On 2019/1/3 ??4:47, Michael S. Tsirkin wrote: > On Sat, Dec 29, 2018 at 08:46:51PM +0800, Jason Wang wrote: >> This series tries to access virtqueue metadata through kernel virtual >> address instead of copy_user() friends since they had too much >> overheads like checks, spec barriers or even hardware feature >> toggling. > Will review, thanks! > One questions

On 2019/1/7 ??11:28, Michael S. Tsirkin wrote: > On Mon, Jan 07, 2019 at 10:19:03AM +0800, Jason Wang wrote: >> On 2019/1/3 ??4:47, Michael S. Tsirkin wrote: >>> On Sat, Dec 29, 2018 at 08:46:51PM +0800, Jason Wang wrote: >>>> This series tries to access virtqueue metadata through kernel virtual >>>> address instead of copy_user() friends since they had

On 2019/1/7 ??11:28, Michael S. Tsirkin wrote: > On Mon, Jan 07, 2019 at 10:19:03AM +0800, Jason Wang wrote: >> On 2019/1/3 ??4:47, Michael S. Tsirkin wrote: >>> On Sat, Dec 29, 2018 at 08:46:51PM +0800, Jason Wang wrote: >>>> This series tries to access virtqueue metadata through kernel virtual >>>> address instead of copy_user() friends since they had

On Fri, Nov 02, 2018 at 11:46:36AM +0000, Mark Rutland wrote: > On Thu, Nov 01, 2018 at 04:06:19PM -0700, Linus Torvalds wrote: > > On Thu, Nov 1, 2018 at 4:00 PM Kees Cook <keescook at chromium.org> wrote: > > > > > > + memset(&rsp, 0, sizeof(rsp)); > > > + rsp.response = VIRTIO_SCSI_S_FUNCTION_REJECTED; > > > + resp =

On Fri, Nov 02, 2018 at 11:46:36AM +0000, Mark Rutland wrote: > On Thu, Nov 01, 2018 at 04:06:19PM -0700, Linus Torvalds wrote: > > On Thu, Nov 1, 2018 at 4:00 PM Kees Cook <keescook at chromium.org> wrote: > > > > > > + memset(&rsp, 0, sizeof(rsp)); > > > + rsp.response = VIRTIO_SCSI_S_FUNCTION_REJECTED; > > > + resp =

Hi Jason, I love your patch! Perhaps something to improve: [auto build test WARNING on net/master] url: https://github.com/0day-ci/linux/commits/Jason-Wang/Fix-various-issue-of-vhost/20181210-223236 config: i386-randconfig-x072-201849 (attached as .config) compiler: gcc-7 (Debian 7.3.0-1) 7.3.0 reproduce: # save the attached .config to linux build tree make ARCH=i386 All

This series tries to access virtqueue metadata through kernel virtual address instead of copy_user() friends since they had too much overheads like checks, spec barriers or even hardware feature toggling. Test shows about 24% improvement on TX PPS. It should benefit other cases as well. Changes from V2: - fix buggy range overlapping check - tear down MMU notifier during vhost ioctl to make sure

This series tries to access virtqueue metadata through kernel virtual address instead of copy_user() friends since they had too much overheads like checks, spec barriers or even hardware feature toggling. Test shows about 24% improvement on TX PPS. It should benefit other cases as well. Changes from V2: - fix buggy range overlapping check - tear down MMU notifier during vhost ioctl to make sure

On Mon, Jan 07, 2019 at 11:53:41AM +0800, Jason Wang wrote: > > On 2019/1/7 ??11:28, Michael S. Tsirkin wrote: > > On Mon, Jan 07, 2019 at 10:19:03AM +0800, Jason Wang wrote: > > > On 2019/1/3 ??4:47, Michael S. Tsirkin wrote: > > > > On Sat, Dec 29, 2018 at 08:46:51PM +0800, Jason Wang wrote: > > > > > This series tries to access virtqueue metadata

Hello, I installed NUT on raspberry pi as a NUT-Server. It works fine so far with a Cyberpower OR600ELCDRM1U (used driver: usbhid-ups). The Pi recognizes power loss and shuts down itself and the ups as it should. Problem: The UPS comes up immediately after shutting down. This is a big issue because there is no power, the server (NUT-Slave) begins powering up and the battery will drain

On Mon, Jan 07, 2019 at 10:19:03AM +0800, Jason Wang wrote: > > On 2019/1/3 ??4:47, Michael S. Tsirkin wrote: > > On Sat, Dec 29, 2018 at 08:46:51PM +0800, Jason Wang wrote: > > > This series tries to access virtqueue metadata through kernel virtual > > > address instead of copy_user() friends since they had too much > > > overheads like checks, spec

Hello all R users, My simulation function works correctly, but I have problems with plot function. You will find the following code using it. Thank you for your help ##################################################" simulation <- function(k, n){ conc <- seq(0,10,by=0.5) #choixg <- seq(1, length(conc)) choixg <- rep(0,length(conc)) for (i in 1:length(conc)){ choixg[i]

On 2019/1/5 ??8:33, Sean Christopherson wrote: > On Fri, Jan 04, 2019 at 04:29:34PM -0500, Michael S. Tsirkin wrote: >> On Sat, Dec 29, 2018 at 08:46:52PM +0800, Jason Wang wrote: >>> Use one generic vhost_copy_to_user() instead of two dedicated >>> accessor. This will simplify the conversion to fine grain >>> accessors. About 2% improvement of PPS were seen

Hi R-users, I have to define a noise level function L and its energy in the various moment of the day by: if time is between 18:00:00 and 23:59:59 then L[j] <- L[j]+5 and W <- 10^((L+5)/10) if time is between 22:00:00 and 05:59:59 ==> L <- L+10 and W <- 10^((L+10)/10) else L=L and W = W Could someone help me to realize this function please? You will find my following

Hi! R users I would like to ask you where could we find the VGAM Package. I don't find it in the list of packages. Thak you for your help Lassana KOITA Etudes de S?curit? et d'Exploitation a?roportuaires / Safety Study & Statistical analysis Service Technique de l'Aviation Civile (STAC) / Civil Aviation Technical Department Direction G?n?rale de l'Aviation Civile (DGAC) /

So the idea is as follows: we convert descriptors to an independent format first, and process that converting to iov later. The point is that we have a tight loop that fetches descriptors, which is good for cache utilization. This will also allow all kind of batching tricks - e.g. it seems possible to keep SMAP disabled while we are fetching multiple descriptors. And perhaps more importantly,

So the idea is as follows: we convert descriptors to an independent format first, and process that converting to iov later. The point is that we have a tight loop that fetches descriptors, which is good for cache utilization. This will also allow all kind of batching tricks - e.g. it seems possible to keep SMAP disabled while we are fetching multiple descriptors. And perhaps more importantly,

Hi, thanks for your reply. >> The Unit is new, the battery drains because it went down to about 15 >> percent before NUT shuts it down. >> >> Yes, I can here a "clac". The problem is not the shutdown procedure, >> it works quite good. After the Unit reaches 20 percent the NUT-Server >> on the pi shuts down the system and the ups is turned off as

Hi, Dear R users I have problem with the following code. The matrix result must be a matrix (3x3). But I have obtained a matrix(3x1) and I don't know why. So, I need your help Best regards ##################################################################### taille <- function (delta, t, prob = 0.2) { niv.conf <- c(0.90, 0.95, 0.99) if(niv.conf <- 0.90) { t <- 1.645 }