Kristof Helwig, main maintainer of the DMA subsystem, KVM, Slab Allocator, and PowerPC architecture in the Linux kernel, who once served on the technical steering committee of the Linux Foundation and acted as a plaintiff in a GPL-related lawsuit against VMware, refused to approve patches related to driver development support in Rust. The proposed patches added wrappers over several functions of the DMA subsystem, allowing the use of DMA in drivers written in Rust. <\/p>\n
The reason for the refusal mentioned was the complexity of maintaining code with wrappers in other languages, along with a desire to keep the programming interfaces to DMA in a readable form in C, without spreading over unclear wrappers. Kristof suggested directly accessing the original C API of DMA in each Rust driver to avoid creating additional abstractions that kernel maintainers would have to depend on. <\/p>\n
\u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 \u043f\u0430\u0442\u0447\u0435\u0439 \u0443\u043a\u0430\u0437\u0430\u043b\u0438, \u0447\u0442\u043e \u043e\u043d\u0438 \u0432\u043e\u0437\u044c\u043c\u0443\u0442 \u043d\u0430 \u0441\u0435\u0431\u044f \u0432\u0441\u044e \u0440\u0430\u0431\u043e\u0442\u0443 \u043f\u043e \u0441\u043e\u043f\u0440\u043e\u0432\u043e\u0436\u0434\u0435\u043d\u0438\u044e \u043a\u043e\u0434\u0430 \u043d\u0430 Rust, \u0433\u043e\u0442\u043e\u0432\u044b \u0441\u043e\u043f\u0440\u043e\u0432\u043e\u0436\u0434\u0430\u0442\u044c \u044d\u0442\u0438 \u043f\u0430\u0442\u0447\u0438 \u0441\u0430\u043c\u043e\u0441\u0442\u043e\u044f\u0442\u0435\u043b\u044c\u043d\u043e \u0438 \u0432\u044b\u043d\u0435\u0441\u043b\u0438 \u043e\u0431\u0432\u044f\u0437\u043a\u0438 \u0432 \u043e\u0442\u0434\u0435\u043b\u044c\u043d\u044b\u0439 \u043f\u043e\u0434\u043a\u0430\u0442\u0430\u043b\u043e\u0433 (rust\/kernel\/dma.rs). \u0412 \u043e\u0442\u0432\u0435\u0442 \u041a\u0440\u0438\u0441\u0442\u043e\u0444 \u043d\u0430\u043b\u043e\u0436\u0438\u043b \u0432\u0435\u0442\u043e («Nacked-by») \u043d\u0430 \u043f\u0440\u0438\u0451\u043c \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u044b\u0445 \u0441 Rust \u043f\u0430\u0442\u0447\u0435\u0439 \u0438 \u0443\u043a\u0430\u0437\u0430\u043b, \u0447\u0442\u043e \u0435\u043c\u0443 \u043d\u0435 \u043d\u0443\u0436\u0435\u043d \u0435\u0449\u0451 \u043e\u0434\u0438\u043d \u0441\u043e\u043f\u0440\u043e\u0432\u043e\u0436\u0434\u0430\u044e\u0449\u0438\u0439. \u041a\u0440\u0438\u0441\u0442\u043e\u0444 \u0437\u0430\u044f\u0432\u0438\u043b, \u0447\u0442\u043e \u0435\u0441\u043b\u0438 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 \u043e\u0431\u0432\u044f\u0437\u043e\u043a \u0445\u043e\u0442\u044f\u0442 \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u043d\u0435\u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u0438 \u0441\u043e\u043f\u0440\u043e\u0432\u043e\u0436\u0434\u0435\u043d\u0438\u044f Linux \u0438\u0437-\u0437\u0430 \u0441\u043c\u0435\u0448\u0438\u0432\u0430\u043d\u0438\u044f \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u0438\u0445 \u044f\u0437\u044b\u043a\u043e\u0432 \u0432 \u043e\u0434\u043d\u043e\u0439 \u043a\u043e\u0434\u043e\u0432\u043e\u0439 \u0431\u0430\u0437\u0435, \u0438\u043c \u0441\u043b\u0435\u0434\u0443\u0435\u0442 \u0434\u0435\u043b\u0430\u0442\u044c \u044d\u0442\u043e \u0432 \u0441\u0432\u043e\u0451\u043c \u0434\u0440\u0430\u0439\u0432\u0435\u0440\u0435, \u0430 \u043d\u0435 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u0442\u044c \u044d\u0442\u0443 \u0440\u0430\u043a\u043e\u0432\u0443\u044e \u043e\u043f\u0443\u0445\u043e\u043b\u044c \u043d\u0430 \u043e\u0441\u043d\u043e\u0432\u043d\u044b\u0435 \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u044b \u044f\u0434\u0440\u0430. <\/p>\n
At the same time, Kristof clarified that he has nothing against Rust and considers it one of the best new languages, but he is against mixing code in different languages. According to Kristof, he is in favor of creating new projects in Rust but opposes mixing Rust into large C codebases, as such mixing significantly reduces the maintainability of the kernel as an integrated project. <\/p>\n
Bistvo te\u017eav s spremljanjem je v tem, da Rust-vrvice postavljajo spremljevalce v odvisnost od kode v jeziku Rust. Na prvi pogled se zdi, da so vrvice le nadgradnje C-struktur in funkcij, ki na noben na\u010din ne vplivajo na razvoj in spremljanje C-kode. A to ni tako. V prisotnosti tak\u0161nih vrvic morajo razvijalci podsystems, napisanih v C, upo\u0161tevati vpliv njihovih sprememb na nadaljnje delovanje vrvic. Vsaka sprememba podatkovnih struktur ali notranjih funkcij v C lahko privede do potrebe po spremembi kode vrvic, zato je treba spremembe v C-kode, ki vplivajo na vrvice, spremljati in sinhronizirati s kodo v Rustu. Mnogi spremljevalci niso pripravljeni prevzeti dodatne odgovornosti za odpravo te\u017eav, ki nastanejo v kodi v Rustu, in no\u010dejo porabiti svojega \u010dasa za spremljanje stanja Rust-vrvic. <\/p>\n
Situacija z zapletanjem spremljanja ni zgolj teoreti\u010dna. V razpravo se je vklju\u010dil Jason Gunthorpe, vzdr\u017eevalec TPM, VFIO in Infiniband pri podjetju NVIDIA, ki je navedel primer zavrnitve pull-zahteve Linusa Torvalds s spremembami v podsklopu za upravljanje pomnilnika, ker je ta sprememba privedla do napake pri poskusu sestave jedra z vklju\u010deno podporo za Rust. Napaka se je pojavila, ker vzdr\u017eevalci kode v Rustu niso dodali potrebnih sprememb v generator vrvic (bindgen). Tako so v vzdr\u017eevanju podsklopu za upravljanje pomnilnika ob napredovanju spremembe, ki je bila povsem korektna z vidika C-kode in jedra na splo\u0161no, postali odvisni od neobvezne tuje kode v jedru, za katero so odgovorni drugi ljudje. <\/p>\n
\u041e\u0442\u043a\u0430\u0437 \u043f\u0440\u0438\u043d\u0438\u043c\u0430\u0442\u044c \u043a\u043e\u0434 \u043e\u0431\u0432\u044f\u0437\u043a\u0438 \u043d\u0430\u0434 \u0432\u044b\u0437\u043e\u0432\u0430\u043c\u0438 DMA \u043f\u043e\u0441\u0442\u0430\u0432\u0438\u043b \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 Rust for Linux \u0432 \u0442\u0443\u043f\u0438\u043a, \u0442\u0430\u043a \u043a\u0430\u043a \u0431\u0435\u0437 \u043f\u043e\u0434\u043e\u0431\u043d\u044b\u0445 \u043e\u0431\u0432\u044f\u0437\u043e\u043a \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0430 \u043f\u043e\u043b\u043d\u043e\u0446\u0435\u043d\u043d\u044b\u0445 \u0434\u0440\u0430\u0439\u0432\u0435\u0440\u043e\u0432 \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 Rust \u0431\u0443\u0434\u0435\u0442 \u0437\u0430\u0442\u0440\u0443\u0434\u043d\u0435\u043d\u0430. \u0413\u0435\u043a\u0442\u043e\u0440 \u041c\u0430\u0440\u0442\u0438\u043d (Hector Martin), \u043c\u044d\u0439\u043d\u0442\u0435\u0439\u043d\u0435\u0440 \u043a\u043e\u0434\u0430 \u0434\u043b\u044f \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438 ARM-\u0447\u0438\u043f\u043e\u0432 Apple \u0438 \u043b\u0438\u0434\u0435\u0440 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 Ashai Linux, \u0432 \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0435 \u0432\u0430\u0440\u0438\u0430\u043d\u0442\u0430 \u0440\u0430\u0437\u0440\u0435\u0448\u0435\u043d\u0438\u044f \u043a\u043e\u043d\u0444\u043b\u0438\u043a\u0442\u0430 \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0438\u043b \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u043f\u0440\u0438\u043d\u044f\u0442\u0438\u044f \u043e\u0431\u0432\u044f\u0437\u043a\u0438 \u043d\u0430\u043f\u0440\u044f\u043c\u0443\u044e \u0447\u0435\u0440\u0435\u0437 \u041b\u0438\u043d\u0443\u0441\u0430 \u0422\u043e\u0440\u0432\u0430\u043b\u044c\u0434\u0441\u0430, \u0432 \u043e\u0431\u0445\u043e\u0434 \u0441\u043e\u043f\u0440\u043e\u0432\u043e\u0436\u0434\u0430\u044e\u0449\u0435\u0433\u043e \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u0443 DMA. \u0415\u0441\u043b\u0438 \u041b\u0438\u043d\u0443\u0441 \u0441\u043e\u0433\u043b\u0430\u0441\u0438\u0442\u0441\u044f \u043d\u0430 \u043f\u043e\u0434\u043e\u0431\u043d\u043e\u0435 \u043d\u0430\u0440\u0443\u0448\u0435\u043d\u0438\u0435 \u0441\u0443\u0431\u043e\u0440\u0434\u0438\u043d\u0430\u0446\u0438\u0438 \u0438 \u0441\u043b\u043e\u0436\u0438\u0432\u0448\u0435\u0439\u0441\u044f \u043f\u0440\u0430\u043a\u0442\u0438\u043a\u0438, \u044d\u0442\u043e \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u0438\u0432\u0435\u0441\u0442\u0438 \u043a \u043a\u0440\u0438\u0437\u0438\u0441\u0443 \u0443\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u043e\u0439 \u044f\u0434\u0440\u0430, \u0430 \u0435\u0441\u043b\u0438 \u043e\u0442\u043a\u0430\u0436\u0435\u0442\u0441\u044f — \u043e\u0441\u0442\u0430\u043d\u043e\u0432\u0438\u0442 \u043f\u0440\u043e\u0434\u0432\u0438\u0436\u0435\u043d\u0438\u0435 Rust \u0432 \u044f\u0434\u0440\u043e. <\/p>\n
Hector mentioned possibly holding Christoph accountable for violating the code of conduct due to a comment where Christoph compared Rust to a tumor. Moreover, Hector expressed that he was tired of all the bureaucratic red tape, unwilling to simply trust established processes, and hinted at involving social media. Dave Airlie, the maintainer of the DRM subsystem, advised against escalating the conflict and emphasized that toxic behavior is unacceptable from both sides, regardless of who is right or wrong in the discussion. <\/p>\n
\u041a \u043e\u0431\u0441\u0443\u0436\u0434\u0435\u043d\u0438\u044e \u043f\u043e\u0434\u043a\u043b\u044e\u0447\u0438\u043b\u0441\u044f \u041b\u0438\u043d\u0443\u0441 \u0422\u043e\u0440\u0432\u0430\u043b\u044c\u0434\u0441, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0443\u043a\u0430\u0437\u0430\u043b, \u0447\u0442\u043e \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e \u0432 \u0441\u0430\u043c\u043e\u043c \u0413\u0435\u043a\u0442\u043e\u0440\u0435 \u0438 \u0435\u0433\u043e \u0441\u0430\u043c\u043e\u0443\u0432\u0435\u0440\u0435\u043d\u043d\u043e\u0441\u0442\u0438 \u0432 \u0442\u043e\u043c, \u0447\u0442\u043e \u043e\u043d \u0437\u043d\u0430\u0435\u0442 \u0447\u0442\u043e-\u0442\u043e \u043b\u0443\u0447\u0448\u0435 \u0434\u0440\u0443\u0433\u0438\u0445, \u0430 \u043d\u0435 \u0432 \u0442\u0435\u043a\u0443\u0449\u0435\u043c \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0435 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u044f\u0434\u0440\u0430, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0440\u0430\u0431\u043e\u0442\u0430\u0435\u0442. \u0423 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0430 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u044f\u0434\u0440\u0430 \u0435\u0441\u0442\u044c \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b, \u043d\u043e \u044d\u0442\u043e \u0436\u0438\u0437\u043d\u0435\u043d\u043d\u0430\u044f \u0440\u0435\u0430\u043b\u044c\u043d\u043e\u0441\u0442\u044c — \u0432 \u0436\u0438\u0437\u043d\u0438 \u043d\u0435\u0442 \u043d\u0438\u0447\u0435\u0433\u043e \u0438\u0434\u0435\u0430\u043b\u044c\u043d\u043e\u0433\u043e. \u041f\u043e\u043f\u044b\u0442\u043a\u0438 \u0442\u0440\u0430\u0432\u043b\u0438 \u0447\u0435\u0440\u0435\u0437 \u0441\u043e\u0446\u0438\u0430\u043b\u044c\u043d\u044b\u0435 \u0441\u0435\u0442\u0438 — \u044d\u0442\u043e \u0442\u043e, \u0447\u0442\u043e \u043e\u0442\u0431\u0438\u0432\u0430\u0435\u0442 \u0436\u0435\u043b\u0430\u043d\u0438\u0435 \u0443 \u041b\u0438\u043d\u0443\u0441\u0430 \u0438\u043c\u0435\u0442\u044c \u0447\u0442\u043e-\u043b\u0438\u0431\u043e \u043e\u0431\u0449\u0435\u0435 \u0441 \u043f\u043e\u0434\u0445\u043e\u0434\u043e\u043c \u0413\u0435\u043a\u0442\u043e\u0440\u0430. \u0417\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u0434\u043b\u044f \u041b\u0438\u043d\u0443\u0441\u0430 \u0438\u043c\u0435\u044e\u0442 \u0442\u0435\u0445\u043d\u0438\u0447\u0435\u0441\u043a\u0438\u0435 \u043e\u0431\u0441\u0443\u0436\u0434\u0435\u043d\u0438\u044f \u0438 \u043f\u0430\u0442\u0447\u0438, \u0430 \u043d\u0435 \u043e\u043a\u0430\u0437\u0430\u043d\u0438\u0435 \u0434\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u0447\u0435\u0440\u0435\u0437 \u0441\u043e\u0446\u0438\u0430\u043b\u044c\u043d\u044b\u0435 \u0441\u0435\u0442\u0438. <\/p>\n
\u0412 \u043e\u0442\u0432\u0435\u0442 \u0413\u0435\u043a\u0442\u043e\u0440 \u043e\u0442\u043f\u0440\u0430\u0432\u0438\u043b \u0437\u0430\u043f\u0440\u043e\u0441 \u043d\u0430 \u0443\u0434\u0430\u043b\u0435\u043d\u0438\u0435 \u0441\u0435\u0431\u044f \u0438\u0437 \u0447\u0438\u0441\u043b\u0430 \u0441\u043e\u043f\u0440\u043e\u0432\u043e\u0436\u0434\u0430\u044e\u0449\u0438\u0445 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u0443 ARM\/APPLE, \u0442\u0430\u043a \u043a\u0430\u043a \u043e\u043d \u043f\u043e\u0442\u0435\u0440\u044f\u043b \u0432\u0435\u0440\u0443 \u0432 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u044b\u0439 \u0432 \u044f\u0434\u0440\u0435 \u043f\u0440\u043e\u0446\u0435\u0441\u0441 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u0438 \u043f\u043e\u0434\u0445\u043e\u0434 \u043a \u0443\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044e \u0441\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e\u043c. \u041e\u043d \u0442\u0430\u043a\u0436\u0435 \u0437\u0430\u044f\u0432\u0438\u043b, \u0447\u0442\u043e \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0430 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b ARM\/Apple \u0431\u0443\u0434\u0435\u0442 \u043f\u0440\u043e\u0434\u043e\u043b\u0436\u0435\u043d\u0430 \u0432\u043d\u0435 \u043e\u0441\u043d\u043e\u0432\u043d\u043e\u0433\u043e \u044f\u0434\u0440\u0430 Linux. \u0423 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b ARM\/Apple \u0432 \u044f\u0434\u0440\u0435 \u043e\u0441\u0442\u0430\u043b\u0441\u044f \u0435\u0449\u0451 \u043e\u0434\u0438\u043d \u043c\u044d\u0439\u043d\u0442\u0435\u0439\u043d\u0435\u0440 — \u0421\u0432\u0435\u043d \u041f\u0438\u0442\u0435\u0440 (Sven Peter), \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043d\u0430\u043c\u0435\u0440\u0435\u043d \u043f\u0440\u043e\u0434\u043e\u043b\u0436\u0438\u0442\u044c \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0430\u043d\u0438\u0435 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b \u0432 \u044f\u0434\u0440\u0435. \u041a\u0440\u0438\u0441\u0442\u043e\u0444 \u0425\u0435\u043b\u0432\u0438\u0433 (Christoph Hellwig), \u043c\u044d\u0439\u043d\u0442\u0435\u0439\u043d\u0435\u0440 \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c DMA, KVM, Slab Allocator \u0438 \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u044b PowerPC \u0432 \u044f\u0434\u0440\u0435 Linux, \u0432 \u0441\u0432\u043e\u0451 \u0432\u0440\u0435\u043c\u044f \u0432\u0445\u043e\u0434\u0438\u0432\u0448\u0438\u0439 \u0432 \u0443\u043f\u0440\u0430\u0432\u043b\u044f\u044e\u0449\u0438\u0439 \u0442\u0435\u0445\u043d\u0438\u0447\u0435\u0441\u043a\u0438\u0439 \u043a\u043e\u043c\u0438\u0442\u0435\u0442 \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u0438 Linux Foundation \u0438 \u0432\u044b\u0441\u0442\u0443\u043f\u0430\u0432\u0448\u0438\u0439 \u0438\u0441\u0442\u0446\u043e\u043c \u0432 \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u043e\u043c \u0441 GPL \u0441\u0443\u0434\u0435\u0431\u043d\u043e\u043c \u0440\u0430\u0437\u0431\u0438\u0440\u0430\u0442\u0435\u043b\u044c\u0441\u0442\u0432\u0435 \u0441 VMware, \u043e\u0442\u043a\u0430\u0437\u0430\u043b\u0441\u044f \u043f\u043e\u0434\u0442\u0432\u0435\u0440\u0436\u0434\u0430\u0442\u044c \u043f\u0430\u0442\u0447\u0438, \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u044b\u0435 \u0441 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u043e\u0439 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u0434\u0440\u0430\u0439\u0432\u0435\u0440\u043e\u0432 \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 Rust. \u041f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d\u043d\u044b\u0439 \u043f\u0430\u0442\u0447\u0438 \u0434\u043e\u0431\u0430\u0432\u043b\u044f\u043b\u0438 \u043e\u0431\u0432\u044f\u0437\u043a\u0438 \u043d\u0430\u0434 \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u0438\u043c\u0438 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Izvor: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"