hi, since kernel 6.11.rc x there are problems fast write, deadlock at rysnc , slow reads, at nfs also normal filesystem --- is ext4 . can not debug --- please have a look. cpus , intel , i7 i5 , m2 samsung , server epic,
Analyzing performance issues can be tricky, or even impossible with so little information to go by. Since you seem to test RC kernels, maybe try to bisect the deadlocks and slow reads via Git bisect: https://www.kernel.org/doc/html/latest/admin-guide/bug-bisect.html to help debugging this one.