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iscsi-scst: increase past CmdSN window to 2048

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On modern storage there might be more, than 128, commands queued, so
previous CmdSN window might be too small and on unstable networks lead
to infinite retries. For more infor see thread
https://sourceforge.net/p/scst/mailman/message/35238904.

Reported-By: Lev Vainblat <lev@zadarastorage.com>



git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@6917 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Vladislav Bolkhovitin
2016-07-26 01:42:26 +00:00
parent 1a24483678
commit 244271120e
1 changed files with 2 additions and 2 deletions
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4
iscsi-scst/kernel/iscsi.c
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@@ -2458,9 +2458,9 @@ static int cmnd_abort_pre_checks(struct iscsi_cmnd *req, int *status)
* Management function request is outside the valid CmdSN window,
* then targets must return the "Task does not exist" response.
*
* 128 seems to be a good "window".
* 2048 seems to be a good "window".
*/
if (between(req_hdr->ref_cmd_sn, req_hdr->cmd_sn - 128,
if (between(req_hdr->ref_cmd_sn, req_hdr->cmd_sn - 2048,
req_hdr->cmd_sn)) {
*status = ISCSI_RESPONSE_FUNCTION_COMPLETE;
res = 0;