On Sat, Apr 30, 2022 at 12:05 PM Huacai Chen <chenhuacai@xxxxxxxxx> wrote: > On Sat, Apr 30, 2022 at 5:45 PM Arnd Bergmann <arnd@xxxxxxxx> wrote: > > On Sat, Apr 30, 2022 at 11:05 AM Huacai Chen <chenhuacai@xxxxxxxxxxx> wrote: > > > > > > This patch adds system call support and related uaccess.h for LoongArch. > > > > > > Q: Why keep __ARCH_WANT_NEW_STAT definition while there is statx: > > > A: Until the latest glibc release (2.34), statx is only used for 32-bit > > > platforms, or 64-bit platforms with 32-bit timestamp. I.e., Most 64- > > > bit platforms still use newstat now. > > > > > > Q: Why keep _ARCH_WANT_SYS_CLONE definition while there is clone3: > > > A: The latest glibc release (2.34) has some basic support for clone3 but > > > it isn't complete. E.g., pthread_create() and spawni() have converted > > > to use clone3 but fork() will still use clone. Moreover, some seccomp > > > related applications can still not work perfectly with clone3. E.g., > > > Chromium sandbox cannot work at all and there is no solution for it, > > > which is more terrible than the fork() story [1]. > > > > > > [1] https://chromium-review.googlesource.com/c/chromium/src/+/2936184 > > > > I still think these have to be removed. There is no mainline glibc or musl > > port yet, and neither of them should actually be required. Please remove > > them here, and modify your libc patches accordingly when you send those > > upstream. > > If this is just a problem that can be resolved by upgrading > glibc/musl, I will remove them. But the Chromium problem (or sandbox > problem in general) seems to have no solution now. I added Christian Brauner to Cc now, maybe he has come across the sandbox problem before and has an idea for a solution. Arnd
