search for: clone_file

...uld likely use CLONE_THREAD for the copy_process() it does. It should look more like "create_io_thread()" than "copy_process()", I think. For example, do virtio worker threads really want their own signals and files? That sounds wrong. create_io_thread() uses all of CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_IO to share much more of the context with the process it is actually run within. Christian? Mike? Linus

...copy_process() it does. > > It should look more like "create_io_thread()" than "copy_process()", I think. > > For example, do virtio worker threads really want their own signals > and files? That sounds wrong. create_io_thread() uses all of > > CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_IO > > to share much more of the context with the process it is actually run within. > For the vhost tasks and the CLONE flags: 1. I didn't use CLONE_FILES in the vhost task patches because you are right and we didn't need our own. We needed it...

...n 19.05.23 14:15, Christian Brauner wrote: > On Thu, May 18, 2023 at 10:25:11AM +0200, Christian Brauner wrote: >> On Wed, May 17, 2023 at 07:09:12PM -0500, Mike Christie wrote: >>> This patch allows the vhost and vhost_task code to use CLONE_THREAD, >>> CLONE_SIGHAND and CLONE_FILES. It's a RFC because I didn't do all the >>> normal testing, haven't coverted vsock and vdpa, and I know you guys >>> will not like the first patch. However, I think it better shows what >> >> Just to summarize the core idea behind my proposal is that no si...

...ner wrote: >>> On Thu, May 18, 2023 at 10:25:11AM +0200, Christian Brauner wrote: >>>> On Wed, May 17, 2023 at 07:09:12PM -0500, Mike Christie wrote: >>>>> This patch allows the vhost and vhost_task code to use CLONE_THREAD, >>>>> CLONE_SIGHAND and CLONE_FILES. It's a RFC because I didn't do all the >>>>> normal testing, haven't coverted vsock and vdpa, and I know you guys >>>>> will not like the first patch. However, I think it better shows what >>>> >>>> Just to summarize the core idea...

...ner wrote: >>> On Thu, May 18, 2023 at 10:25:11AM +0200, Christian Brauner wrote: >>>> On Wed, May 17, 2023 at 07:09:12PM -0500, Mike Christie wrote: >>>>> This patch allows the vhost and vhost_task code to use CLONE_THREAD, >>>>> CLONE_SIGHAND and CLONE_FILES. It's a RFC because I didn't do all the >>>>> normal testing, haven't coverted vsock and vdpa, and I know you guys >>>>> will not like the first patch. However, I think it better shows what >>>> Just to summarize the core idea behind my proposa...

Hey all, Had a power failure and subsequent ext3 disk corruptions. Attempting to fix, but not working. Its a 120 gig IDE disk, 3 partitions. /boot, /, and swap. Basically can't boot up since the box can't get to the system files in /usr/ or anything. So I'm booting off of a FC2 disk 1 in recovery mode and trying to fix the filesystem with e2fsck The boot partition cleaned up

...ILL ? > > When we get a SIGKILL, the thread that owns the device/vhost_task will > also exit since it's the same thread group and it does: > > do_exit -> exit_files -> put_files_struct -> close_files -> fput Ah. thanks. I confused CLONE_FS in vhost_task_create() with CLONE_FILES. > > Also. Suppose that vhost_worker() dequeues SIGKILL and clears TIF_SIGPENDING. > > > > SIGSTOP, PTRACE_INTERRUPT, freezer can come and set TIF_SIGPENDING again. > > In this case the main for (;;) loop will spin without sleeping until > > vhost_task_should_stop()...

...0) = 0x80776e8 brk(0x8078000) = 0x8078000 mmap2(NULL, 8392704, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x4044d000 mprotect(0x4044d000, 4096, PROT_NONE) = 0 clone(child_stack=0x40c4db08, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID|CLONE_DETACHED, parent_tidptr=0x40c4dbf8, {entry_number:0, base_addr:0x40c4dbb0, limit:1048575, seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1, seg_not_present:0, useable:1}, child_tidpt...

...r->fn ) { + (*(handler->fn))(handler->vcpu); + handler->fn = NULL; + } + return 0; +} + +static void __vcpu_hotplug_handler(void *unused) +{ + int err; + + err = kernel_thread(vcpu_hotplug_cpu_process, + NULL, CLONE_FS | CLONE_FILES); + if ( err < 0 ) + printk(KERN_ALERT "Error creating hotplug_cpu process!\n"); + +} + +static void vcpu_hotplug_event_handler(ctrl_msg_t *msg, unsigned long id) +{ + static DECLARE_WORK(vcpu_hotplug_work, __vcpu_hotplug_handler, NULL); + vcpu_hotplug_t *req = (vcpu_h...

...d file descriptor) > close(-1) = -1 EBADF (Bad file descriptor) > mmap2(NULL, 8392704, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb75c4000 > mprotect(0xb75c4000, 4096, PROT_NONE) = 0 > clone(child_stack=0xb7dc44c4, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tidptr=0xb7dc4bd8, {entry_number:6, base_addr:0xb7dc4b90, limit:1048575, seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1, seg_not_present:0, useable:1}, child_tidptr=0xb7dc4bd8) = 115...

Unlike full virtualization in which the virtual machine provides the same platform interface as running natively on the hardware, paravirtualization requires modification to the guest operating system to work with the platform interface provided by the hypervisor. Xen was designed with performance in mind. Calls to the hypervisor are minimized, batched if necessary, and non-critical codepaths

Unlike full virtualization in which the virtual machine provides the same platform interface as running natively on the hardware, paravirtualization requires modification to the guest operating system to work with the platform interface provided by the hypervisor. Xen was designed with performance in mind. Calls to the hypervisor are minimized, batched if necessary, and non-critical codepaths

Unlike full virtualization in which the virtual machine provides the same platform interface as running natively on the hardware, paravirtualization requires modification to the guest operating system to work with the platform interface provided by the hypervisor. Xen was designed with performance in mind. Calls to the hypervisor are minimized, batched if necessary, and non-critical codepaths