Re: [PATCH] uprobes: reduce contention on uprobes_tree access

* Jonathan Haslam wrote: > Active uprobes are stored in an RB tree and accesses to this tree are > dominated by read operations. Currently these accesses are serialized by > a spinlock but this leads to enormous contention when large numbers of > threads are executing active probes. > > This p

Re: [PATCH v2] arch/riscv: Enable kprobes when CONFIG_MODULES=n

On Sun Mar 24, 2024 at 2:37 AM EET, Randy Dunlap wrote: > > > On 3/23/24 16:29, Jarkko Sakkinen wrote: > > +config HAVE_KPROBES_ALLOC > > + bool > > + help > > + Architectures that select this option are capable of allocating memory > > + for kprobes withou the kernel module allocator.

Re: [PATCH v2] arch/riscv: Enable kprobes when CONFIG_MODULES=n

On 3/23/24 16:29, Jarkko Sakkinen wrote: > +config HAVE_KPROBES_ALLOC > + bool > + help > + Architectures that select this option are capable of allocating memory > + for kprobes withou the kernel module allocator. without -- #Randy

Re: [PATCH v2] arch/riscv: Enable kprobes when CONFIG_MODULES=n

On Sun Mar 24, 2024 at 1:29 AM EET, Jarkko Sakkinen wrote: > Tracing with kprobes while running a monolithic kernel is currently > impossible due the kernel module allocator dependency. > > Address the issue by allowing architectures to implement module_alloc() > and module_memfree() independent of

[PATCH v2] arch/riscv: Enable kprobes when CONFIG_MODULES=n

Tracing with kprobes while running a monolithic kernel is currently impossible due the kernel module allocator dependency. Address the issue by allowing architectures to implement module_alloc() and module_memfree() independent of the module subsystem. An arch tree can signal this by setting HAVE_

[BUG][KMEMLEAK] modprobe: unreferenced object (size 16)

Hi, On the Ubuntu 22.04 LTS system, with recent iproute2-next toolsvand build 6.8-11743-ga4145ce1e7bc, kmemleak system reported the following memory leaks: unreferenced object 0x9da692e7e920 (size 16): comm "modprobe", pid 2248188, jiffies 4358296226 hex dump (first 16 bytes): 68 6d 6d 5f 6

Re: [PATCH v7 3/7] LoongArch: KVM: Add cpucfg area for kvm hypervisor

On 3/15/24 16:07, Bibo Mao wrote: Instruction cpucfg can be used to get processor features. And there is trap exception when it is executed in VM mode, and also it is to provide cpu features to VM. On real hardware cpucfg area 0 - 20 is used. Here one specified area 0x4000 -- 0x40ff is u

Re: [PATCH v7 7/7] Documentation: KVM: Add hypercall for LoongArch

On 3/15/24 16:11, Bibo Mao wrote: [snip] +KVM hypercall ABI += + +Hypercall ABI on KVM is simple, only one scratch register a0 and at most +five generic registers used as input parameter. FP register and vector register +is not used for input register and should not be modified du

Re: [PATCH v2 net] ice: Fix freeing uninitialized pointers

> Automatically cleaned up pointers need to be initialized before exiting > their scope. In this case, they need to be initialized to NULL before > any return statement. * May we expect that compilers should report that affected variables were only declared here instead of appropriately defined

Re: [PATCH] [v2] module: don't ignore sysfs_create_link() failures

On Fri, Mar 22, 2024 at 06:39:11PM +0100, Arnd Bergmann wrote: > From: Arnd Bergmann > > The sysfs_create_link() return code is marked as __must_check, but the > module_add_driver() function tries hard to not care, by assigning the > return code to a variable. When building with 'make W=1', gcc s

Re: [PATCH 00/64] i2c: reword i2c_algorithm according to newest specification

Hi Wolfram, On Fri, Mar 22, 2024 at 02:24:53PM +0100, Wolfram Sang wrote: > Okay, we need to begin somewhere... > > Start changing the wording of the I2C main header wrt. the newest I2C > v7, SMBus 3.2, I3C specifications and replace "master/slave" with more > appropriate terms. This first step r