Commit ef5b7c69 authored by NeilBrown's avatar NeilBrown

md/raid5: move resolving of reconstruct_state earlier in

stripe_handle.

The chunk of code in stripe_handle which responds to a
*_result value in reconstruct_state is really the completion
of some processing that happened outside of handle_stripe
(possibly asynchronously) and so should be one of the first
things done in handle_stripe().

After the next patch it will be important that it happens before
handle_stripe_clean_event(), as that will clear some dev->flags
bit that this code tests.
Signed-off-by: default avatarNeilBrown <neilb@suse.de>
parent 4ac6875e
......@@ -3490,40 +3490,6 @@ static void handle_stripe(struct stripe_head *sh)
handle_failed_sync(conf, sh, &s);
}
/*
* might be able to return some write requests if the parity blocks
* are safe, or on a failed drive
*/
pdev = &sh->dev[sh->pd_idx];
s.p_failed = (s.failed >= 1 && s.failed_num[0] == sh->pd_idx)
|| (s.failed >= 2 && s.failed_num[1] == sh->pd_idx);
qdev = &sh->dev[sh->qd_idx];
s.q_failed = (s.failed >= 1 && s.failed_num[0] == sh->qd_idx)
|| (s.failed >= 2 && s.failed_num[1] == sh->qd_idx)
|| conf->level < 6;
if (s.written &&
(s.p_failed || ((test_bit(R5_Insync, &pdev->flags)
&& !test_bit(R5_LOCKED, &pdev->flags)
&& (test_bit(R5_UPTODATE, &pdev->flags) ||
test_bit(R5_Discard, &pdev->flags))))) &&
(s.q_failed || ((test_bit(R5_Insync, &qdev->flags)
&& !test_bit(R5_LOCKED, &qdev->flags)
&& (test_bit(R5_UPTODATE, &qdev->flags) ||
test_bit(R5_Discard, &qdev->flags))))))
handle_stripe_clean_event(conf, sh, disks, &s.return_bi);
/* Now we might consider reading some blocks, either to check/generate
* parity, or to satisfy requests
* or to load a block that is being partially written.
*/
if (s.to_read || s.non_overwrite
|| (conf->level == 6 && s.to_write && s.failed)
|| (s.syncing && (s.uptodate + s.compute < disks))
|| s.replacing
|| s.expanding)
handle_stripe_fill(sh, &s, disks);
/* Now we check to see if any write operations have recently
* completed
*/
......@@ -3561,6 +3527,40 @@ static void handle_stripe(struct stripe_head *sh)
s.dec_preread_active = 1;
}
/*
* might be able to return some write requests if the parity blocks
* are safe, or on a failed drive
*/
pdev = &sh->dev[sh->pd_idx];
s.p_failed = (s.failed >= 1 && s.failed_num[0] == sh->pd_idx)
|| (s.failed >= 2 && s.failed_num[1] == sh->pd_idx);
qdev = &sh->dev[sh->qd_idx];
s.q_failed = (s.failed >= 1 && s.failed_num[0] == sh->qd_idx)
|| (s.failed >= 2 && s.failed_num[1] == sh->qd_idx)
|| conf->level < 6;
if (s.written &&
(s.p_failed || ((test_bit(R5_Insync, &pdev->flags)
&& !test_bit(R5_LOCKED, &pdev->flags)
&& (test_bit(R5_UPTODATE, &pdev->flags) ||
test_bit(R5_Discard, &pdev->flags))))) &&
(s.q_failed || ((test_bit(R5_Insync, &qdev->flags)
&& !test_bit(R5_LOCKED, &qdev->flags)
&& (test_bit(R5_UPTODATE, &qdev->flags) ||
test_bit(R5_Discard, &qdev->flags))))))
handle_stripe_clean_event(conf, sh, disks, &s.return_bi);
/* Now we might consider reading some blocks, either to check/generate
* parity, or to satisfy requests
* or to load a block that is being partially written.
*/
if (s.to_read || s.non_overwrite
|| (conf->level == 6 && s.to_write && s.failed)
|| (s.syncing && (s.uptodate + s.compute < disks))
|| s.replacing
|| s.expanding)
handle_stripe_fill(sh, &s, disks);
/* Now to consider new write requests and what else, if anything
* should be read. We do not handle new writes when:
* 1/ A 'write' operation (copy+xor) is already in flight.
......
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