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xfs: fix cil push sequence after log recovery
When the CIL checkpoint is fully written to the log, the LSN of the checkpoint commit record is written into the CIL context structure. This allows log force waiters to correctly detect when the checkpoint they are waiting on have been fully written into the log buffers. However, the initial context after mount is initialised with a non-zero commit LSN, so appears to waiters as though it is complete even though it may not have even been pushed, let alone written to the log buffers. Hence a log force immediately after a filesystem is mounted may not behave correctly, nor does commit record ordering if multiple CIL pushes interleave immediately after mount. To fix this, make sure the initial context commit LSN is not touched until the first checkpointis actually pushed. [dchinner: rewrite commit message] Signed-off-by: Mark Tinguely <tinguely@sgi.com> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
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@ -78,8 +78,6 @@ xlog_cil_init_post_recovery(
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{
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log->l_cilp->xc_ctx->ticket = xlog_cil_ticket_alloc(log);
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log->l_cilp->xc_ctx->sequence = 1;
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log->l_cilp->xc_ctx->commit_lsn = xlog_assign_lsn(log->l_curr_cycle,
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log->l_curr_block);
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}
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/*
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