Messages in this thread Patch in this message | ![/](/images/icornerl.gif) | | Date | Tue, 25 Mar 2003 17:39:40 GMT | From | Stephen Tweedie <> | Subject | [Patch 8/8] 2.4: Fix flushtime ordering on BUF_DIRTY list |
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[From Andrew Morton.] Set the flushtime on committing buffers when they are actually sent to the dirty list, not when they are first dirtied. Avoids some starvation scenarios when the flushtimes on BUF_DIRTY get out-of-order.
--- linux-2.4-ext3push/fs/jbd/transaction.c.=K0007=.orig 2003-03-25 10:59:15.000000000 +0000 +++ linux-2.4-ext3push/fs/jbd/transaction.c 2003-03-25 10:59:15.000000000 +0000 @@ -1138,7 +1138,6 @@ int journal_dirty_metadata (handle_t *ha spin_lock(&journal_datalist_lock); set_bit(BH_JBDDirty, &bh->b_state); - set_buffer_flushtime(bh); J_ASSERT_JH(jh, jh->b_transaction != NULL); @@ -2090,6 +2089,13 @@ void journal_file_buffer(struct journal_ spin_unlock(&journal_datalist_lock); } +static void jbd_refile_buffer(struct buffer_head *bh) +{ + if (buffer_dirty(bh) && (bh->b_list != BUF_DIRTY)) + set_buffer_flushtime(bh); + refile_buffer(bh); +} + /* * Remove a buffer from its current buffer list in preparation for * dropping it from its current transaction entirely. If the buffer has @@ -2110,7 +2116,7 @@ void __journal_refile_buffer(struct jour __journal_unfile_buffer(jh); jh->b_transaction = NULL; /* Onto BUF_DIRTY for writeback */ - refile_buffer(jh2bh(jh)); + jbd_refile_buffer(jh2bh(jh)); return; } - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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