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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-07-04 18:15:03 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-07-04 18:15:03 +0300 |
| commit | 7813029a509c0c92a5b16d846defaa50a2d3d7f1 (patch) | |
| tree | 1962ab81537b7155d185f4b0b06c0323ff4dc509 /Documentation/scsi/scsi_eh.txt | |
| parent | 3c9a6793bde1feb368cd6ef113c08a40a37f7517 (diff) | |
| parent | a99cde438de0c4c0cecc1d1af1a55a75b10bfdef (diff) | |
| download | linux-7813029a509c0c92a5b16d846defaa50a2d3d7f1.tar.xz | |
Merge 4.7-rc6 into staging-next
We want the staging fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/scsi/scsi_eh.txt')
| -rw-r--r-- | Documentation/scsi/scsi_eh.txt | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/Documentation/scsi/scsi_eh.txt b/Documentation/scsi/scsi_eh.txt index 8638f61c8c9d..37eca00796ee 100644 --- a/Documentation/scsi/scsi_eh.txt +++ b/Documentation/scsi/scsi_eh.txt @@ -263,19 +263,23 @@ scmd->allowed. 3. scmd recovered ACTION: scsi_eh_finish_cmd() is invoked to EH-finish scmd - - shost->host_failed-- - clear scmd->eh_eflags - scsi_setup_cmd_retry() - move from local eh_work_q to local eh_done_q LOCKING: none + CONCURRENCY: at most one thread per separate eh_work_q to + keep queue manipulation lockless 4. EH completes ACTION: scsi_eh_flush_done_q() retries scmds or notifies upper - layer of failure. + layer of failure. May be called concurrently but must have + a no more than one thread per separate eh_work_q to + manipulate the queue locklessly - scmd is removed from eh_done_q and scmd->eh_entry is cleared - if retry is necessary, scmd is requeued using scsi_queue_insert() - otherwise, scsi_finish_command() is invoked for scmd + - zero shost->host_failed LOCKING: queue or finish function performs appropriate locking |