Date: Sat, 6 Mar 2021 03:46:02 GMT From: Alexander Motin <mav@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 6ed39db2573b - main - Do not exit ctl_be_block_worker() prematurely. Message-ID: <202103060346.1263k2uU053563@gitrepo.freebsd.org>
next in thread | raw e-mail | index | archive | help
The branch main has been updated by mav: URL: https://cgit.FreeBSD.org/src/commit/?id=6ed39db2573bb808ac2c206cd6c831f0be86219c commit 6ed39db2573bb808ac2c206cd6c831f0be86219c Author: Alexander Motin <mav@FreeBSD.org> AuthorDate: 2021-03-06 03:39:52 +0000 Commit: Alexander Motin <mav@FreeBSD.org> CommitDate: 2021-03-06 03:45:47 +0000 Do not exit ctl_be_block_worker() prematurely. Return while there are any I/Os in a queue may result in them stuck indefinitely, since there is only one taskqueue task for all of them. I think I've reproduced this by switching ha_role to secondary under heavy load. MFC after: 3 days --- sys/cam/ctl/ctl_backend_block.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/sys/cam/ctl/ctl_backend_block.c b/sys/cam/ctl/ctl_backend_block.c index 3663bff10f2a..9f96c157d5ae 100644 --- a/sys/cam/ctl/ctl_backend_block.c +++ b/sys/cam/ctl/ctl_backend_block.c @@ -1672,7 +1672,7 @@ ctl_be_block_worker(void *context, int pending) if (cbe_lun->flags & CTL_LUN_FLAG_NO_MEDIA) { ctl_set_busy(&io->scsiio); ctl_complete_beio(beio); - return; + continue; } be_lun->dispatch(be_lun, beio); continue; @@ -1685,7 +1685,7 @@ ctl_be_block_worker(void *context, int pending) if (cbe_lun->flags & CTL_LUN_FLAG_NO_MEDIA) { ctl_set_busy(&io->scsiio); ctl_config_write_done(io); - return; + continue; } ctl_be_block_cw_dispatch(be_lun, io); continue; @@ -1698,7 +1698,7 @@ ctl_be_block_worker(void *context, int pending) if (cbe_lun->flags & CTL_LUN_FLAG_NO_MEDIA) { ctl_set_busy(&io->scsiio); ctl_config_read_done(io); - return; + continue; } ctl_be_block_cr_dispatch(be_lun, io); continue; @@ -1711,7 +1711,7 @@ ctl_be_block_worker(void *context, int pending) if (cbe_lun->flags & CTL_LUN_FLAG_NO_MEDIA) { ctl_set_busy(&io->scsiio); ctl_data_submit_done(io); - return; + continue; } ctl_be_block_dispatch(be_lun, io); continue;
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?202103060346.1263k2uU053563>