On Tue, Dec 07 2010 at 1:10pm -0500, Jon Nelson <jnelson@xxxxxxxxxxx> wrote: > I finally found some time to test this out. With 2.6.37-rc4 (openSUSE > KOTD kernel) I easily encounter the issue. > > Using a virtual machine, I created a stock, minimal openSUSE 11.3 x86_64 > install, installed all updates, installed postgresql and the 'KOTD' > (Kernel of the Day) > kernel, and ran the following tests (as postgres user because I'm > lazy). > > 1. create a database (from bash): > > createdb test > > 2. place the following contents in a file (I used 't.sql'): > > begin; > create temporary table foo as select x as a, ARRAY[x] as b FROM > generate_series(1, 10000000 ) AS x; > create index foo_a_idx on foo (a); > create index foo_b_idx on foo USING GIN (b); > rollback; > > 3. execute that sql: > > psql -f t.sql --echo-all test > > > With 2.6.34.7 I can re-run [3] all day long, as many times as I want, > without issue. > > With 2.6.37-rc4-13 (the currently-installed KOTD kernel) if tails > pretty frequently. How does it fail? postgres errors? kernel errors? > Then I tested with the 'vanilla' kernel available here: > > http://download.opensuse.org/repositories/Kernel:/vanilla/standard/ > > The 'vanilla' kernel exhibited the same problems. > The version I tested: 2.6.37-rc4-219-g771f8bc-vanilla. > > Incidentally, quick tests of jfs, xfs, and ext3 do _not_ show the same > problems, although I will note that I usually saw failure at least 1 > in 3, but sometimes had to re-run the sql test 4 or 5 times before I > saw failure. > > I will continue to do some testing, but I will hold off on testing the > commits above until I receive further testing suggestions. OK, so to be clear: your testing is on dm-crypt + ext4? And you're testing upstream based kernels (meaning the dm-crypt scalability patch that has been in question is _not_ in the mix)? That is a very different report than the other 2 reports of corruption (those corruption instances were only seen once the dm-crypt scalability patch was introduced). Mike -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
