WebbFör 1 dag sedan · Shutemov wrote: > On Wed, Aug 17, 2024 at 10:40:12PM -0700, Hugh Dickins wrote: > > On Wed, 6 Jul 2024, Chao Peng wrote: > > > This is the v7 of this series which tries to implement the fd-based KVM > > > guest private memory. > > > > Here at last are my reluctant thoughts on this patchset. > > > > fd-based approach for supporting … WebbTo address those above, this set of patches add following: 1> Let memfd_create() set X bit at creation time. 2> Let memfd to be sealed for modifying X bit. 3> A new pid namespace sysctl: vm.memfd_noexec to control the behavior of X bit.For example, if a container has vm.memfd_noexec=2, then memfd_create() without MFD_NOEXEC_SEAL will be ...
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WebbFor example, if a container has vm.memfd_noexec=2, then memfd_create() without MFD_NOEXEC_SEAL will be rejected. 4> A new security hook in memfd_create(). This make it possible to a new LSM, which rejects or allows executable memfd based on its security policy. This is V4 version of patch: see [4] [5] [6] for previous versions. Webb16 maj 2024 · 这个fd某种意义上充当了一个中间媒介的作用。 有人说，那还不简单吗，如果进程A:fd = open (); open ()如果返回100，把这个100告诉进程B不就可以了吗，进程B访问这个100就可以了。 这说明你还是没搞明白fd是一个进程内部的东西，是不能跨进程的概念。 你的100和我的100，不是一个东西。 这些基本的东西你搞不明白，你搞别的都是白 … free gif stream starting soon
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Webb14 okt. 2024 · sqlite - connection opened shared memfd open () failed: Function not implemented ALSA lib confmisc.c:767: (parse_card) cannot find card '0' ALSA lib conf.c:4528: (_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory ALSA lib confmisc.c:392: (snd_func_concat) error evaluating strings … WebbAnonymous memory is used for all backing pages of the file. Therefore, files created by memfd_create () have the same semantics as other anonymous memory allocations such as those allocated using mmap (2) with the MAP_ANONYMOUS flag. The initial size of the file is set to 0. Following the call, the file size should be set using ftruncate (2). Webbshm_open () creates and opens a new, or opens an existing, POSIX shared memory object. A POSIX shared memory object is in effect a handle which can be used by unrelated processes to mmap (2) the same region of shared memory. The shm_unlink () function performs the converse operation, removing an object previously created by shm_open (). blue and gold globe