Steve French <smfrench@xxxxxxxxx> wrote: > Noticed an interesting bug with test generic/586 where the file size > can be reset smaller (shrinking the file) due to being sent too late > (after the last write, instead of before it). > > Trying it to Samba e.g. if I use default mount parms it works, I see > write of 1MB at 1MB, then filesize shrinks to 1MB, then write of 1MB > against at 1MB so file size up at its expected value (2MB) at end of > test, but when mounting with cifsacl (perhaps due to lease breaks) I > see different ordering of the final write and set file size so the > final set file size shrinks it to 1MB. > > The test is intended to test: > "Race an appending aio dio write to the second block of a file while > simultaneously fallocating to the first block." > so it is plausible that we are missing a lock somewhere. What kernel and patches? David
