(switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface). On Mon, 13 Dec 2021 16:38:44 +0000 bugzilla-daemon@xxxxxxxxxxxxxxxxxxx wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=215323 Thanks. > > Bug ID: 215323 > Summary: Frequently swapping, userspace program will abnormally > exit. Looks like a zram data corruption. > Product: Memory Management > Version: 2.5 > Kernel Version: Linux 5.15.6 > Hardware: Intel > OS: Linux > Tree: Mainline > Status: NEW > Severity: normal > Priority: P1 > Component: Other > Assignee: akpm@xxxxxxxxxxxxxxxxxxxx > Reporter: dengchangcheng2021@xxxxxxx > Regression: No Are you sure "No"? Did previous kernels do this, or only 5.15? > kernel: 5.15.6 version kernel > config: using x86_64_defconfig plus docker and zram configurations > > # free -m > total used free shared buff/cache available > Mem: 3868 3560 37 3 270 42 > Swap: 3868 1819 2049 > > Userspace program(for example dockerd) had a big chance to exit abnormally when > frequently swapping with zram in about an hour. We found that a page on the > stack of the program is cleaned to zero. In order to find out who cleans stack, > we add a monitor to catch whether a page is modifed by swap. And we found out a > page is indeed modifed after swap out/in. > > To reproduce, do the following. > At first, set the value of /proc/sys/vm/swappiness to 100. > Then use programs that include mmap or malloc to consume memory, so that to > trigger swap frequently occurs. > Finally, use docker to load images in multiple ways. > After running for a while, dockerd will exit. At the same time dockerd will > record the following: > runtime: unexpected return pc for 2021-12-09T03:32:30.290948+00:00 (none) > dockerd[350]: time="2021-12-09T03:32:30.290846695Z" level=info msg="Applied > tar sha256:d69d9fecbe66f52f6ba42cf251286a8912d80c20938e25620654a87e5760ccae > to cca4b9df0747f37898e41bd2059d1a38fdf57c24b31bd00e248e2ba6cd03d63d, size: > 10565287" > runtime.gopark called from 0x0 > stack: frame={sp:0xc4202c1dd8, fp:0xc4202c1df8} > stack=[0xc4202c1800,0xc4202c2000) > 000000c4202c1cd8: 0000000000000000 0000000000000000 > 000000c4202c1ce8: 0000000000000000 0000000000000000 > 000000c4202c1cf8: 0000000000000000 0000000000000000 > 000000c4202c1d08: 0000000000000000 0000000000000000 > 000000c4202c1d18: 0000000000000000 0000000000000000 > 000000c4202c1d28: 0000000000000000 0000000000000000 > 000000c4202c1d38: 0000000000000000 0000000000000000 > 000000c4202c1d48: 0000000000000000 0000000000000000 > 000000c4202c1d58: 0000000000000000 0000000000000000 > 000000c4202c1d68: 0000000000000000 0000000000000000 > 000000c4202c1d78: 0000000000000000 0000000000000000 > 000000c4202c1d88: 0000000000000000 0000000000000000 > 000000c4202c1d98: 0000000000000000 0000000000000000 > 000000c4202c1da8: 0000000000000000 0000000000000000 > 000000c4202c1db8: 0000000000000000 0000000000000000 > 000000c4202c1dc8: 0000000000000000 0000000000000000 > 000000c4202c1dd8: <0000000000000000 0000000000000000 > 000000c4202c1de8: 0000000000000000 !0000000000000000 > 000000c4202c1df8: >0000000000000000 0000000000000000 > 000000c4202c1e08: 0000000000000000 0000000000000000 > 000000c4202c1e18: 0000000000000000 0000000000000000 > 000000c4202c1e28: 0000000000000000 0000000000000000 > 000000c4202c1e38: 0000000000000000 0000000000000000 > 000000c4202c1e48: 0000000000000000 0000000000000000 > 000000c4202c1e58: 0000000000000000 0000000000000000 > 000000c4202c1e68: 0000000000000000 0000000000000000 > 000000c4202c1e78: 0000000000000000 0000000000000000 > 000000c4202c1e88: 0000000000000000 0000000000000000 > 000000c4202c1e98: 0000000000000000 0000000000000000 > 000000c4202c1ea8: 0000000000000000 0000000000000000 > 000000c4202c1eb8: 0000000000000000 0000000000000000 > 000000c4202c1ec8: 0000000000000000 0000000000000000 > 000000c4202c1ed8: 0000000000000000 0000000000000000 > 000000c4202c1ee8: 0000000000000000 0000000000000000 > fatal error: unknown caller pc > > -- > You may reply to this email to add a comment. > > You are receiving this mail because: > You are the assignee for the bug.
