Hi all, This is a resurrection of an old fix for the indirect delalloc reservation split problem. The last version apparently fell through the cracks. The core problem and fix is the same and is described in patch 3. The original problem is not as reproducible as it was since the last version of this patch. The original zero range reproducer doesn't work because zero range has since been updated to flush and invalidate the affected range rather than kill any delayed allocation blocks in the in core extent tree. The side effect of this is that the problem does not currently have a clear reproducer, but the indirect reservation management code is still incorrect nonetheless. As a result, I've prepended an RFC test instrumentation patch that can help induce the problem[1]. I've marked the patch RFC simply because it is hacky and probably up in the air as to whether it is merge worthy. I wanted to have _something_ to help reproduce the problem and verify the fix, however, hence it is included here. I'm fine with either merging it or using it as a one-off verification and dropping it. Also, any other ideas for a more simple/elegant reproducer are welcome. Thoughts, reviews, flames appreciated. Brian [1] An update to the original xfstests test is also required. I'll send that update in a reply to this cover letter shortly. v2: - Rebase to latest for-next branch. - Include RFC test instrumentation patch. v1: http://oss.sgi.com/archives/xfs/2014-10/msg00294.html - xfs_bunmapi() code into independent patch. - Refactor fix into separate helper function. rfc: http://oss.sgi.com/archives/xfs/2014-09/msg00337.html Brian Foster (3): xfs: debug mode forced buffered write failure xfs: update icsb freeblocks counter after extent deletion xfs: borrow indirect blocks from freed extent when available fs/xfs/libxfs/xfs_bmap.c | 158 ++++++++++++++++++++++++++++++++++------------- fs/xfs/xfs_aops.c | 9 ++- fs/xfs/xfs_mount.h | 9 +++ fs/xfs/xfs_sysfs.c | 78 ++++++++++++++++++++--- 4 files changed, 200 insertions(+), 54 deletions(-) -- 2.4.3 _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
