Re: [RFC 0/5] Ext4: Add support for blocksize < pagesize for dioread_nolock

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Hi Ritesh,

I haven't had a chance to dig into the test failures yet, but FYI....
when I ran the auto test group in xfstests, I saw failures for
generic/219, generic 273, and generic/476 --- these errors did not
show up when running using a standard 4k blocksize on x86, and they
also did not show up when running dioread_nolock using a 4k blocksize.

So I tried running "generic/219 generic/273 generic/476" 30 times,
using in a Google Compute Engine VM, using gce-xfstests, and while I
wasn't able to get generic/219 to fail when run in isolation,
generic/273 seems to fail quite reliably, and generic/476 about a
third of the time.

How much testing have you done with these patches?

Thanks,

							- Ted

TESTRUNID: tytso-20191023144956
KERNEL:    kernel 5.4.0-rc3-xfstests-00005-g39b811602906 #1244 SMP Wed Oct 23 11:30:25 EDT 2019 x86_64
CMDLINE:   --update-files -C 30 -c dioread_nolock_1k generic/219 generic/273 generic/476
CPUS:      2
MEM:       7680

ext4/dioread_nolock_1k: 90 tests, 42 failures, 10434 seconds
  Failures: generic/273 generic/273 generic/273 generic/273
    generic/476 generic/273 generic/476 generic/273 generic/273
    generic/273 generic/476 generic/273 generic/476 generic/273
    generic/476 generic/273 generic/476 generic/273 generic/273
    generic/273 generic/273 generic/273 generic/476 generic/273
    generic/273 generic/273 generic/273 generic/476 generic/273
    generic/476 generic/273 generic/476 generic/273 generic/273
    generic/273 generic/273 generic/273 generic/273 generic/273
    generic/476 generic/273 generic/476
Totals: 90 tests, 0 skipped, 42 failures, 0 errors, 10434s




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