On Tue, May 14, 2019 at 7:19 AM Dave Chinner <david@xxxxxxxxxxxxx> wrote: > decimal hex > 459388955 1b61b7cb > 4733263928 11a1fdfe8 > ^ > Single bit is wrong in the free block count. > > IOWs, I'd say there's single bit errors happening somewhere in your > system. Whether it be memory corruption, machines being rowhammered, > uncorrected storage media errors, etc I have no idea. But it seems > suspicious that the free block count is almost exactly 0x100000000 > out.... This issue is happening on more than one host, so I'm guessing that it might not be a RAM issue... however, all the incorrect fdblocks values do start with a 1: server2 /dev/sdm fdblocks = 4674169069 (0x1169A28ED) server3 /dev/sdad fdblocks = 4722598181 (0x1197D2125) server4 /dev/sdad fdblocks = 4708207408 (0x118A18B30)