linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Oded Gabbay <oded.gabbay@gmail.com>
To: linux-kernel@vger.kernel.org, oshpigelman@habana.ai,
	ttayar@habana.ai, gregkh@linuxfoundation.org
Subject: [PATCH 8/9] habanalabs: kill user process after CS rollback
Date: Sun, 28 Jul 2019 14:28:17 +0300	[thread overview]
Message-ID: <20190728112818.30397-9-oded.gabbay@gmail.com> (raw)
In-Reply-To: <20190728112818.30397-1-oded.gabbay@gmail.com>

This patch calls the kill user process function after we rollback the
in-flight CSs. This is because the user process can't be closed while
there are open CSs. Therefore, there is no point of sending it a SIGKILL
before we do the rollback CS part.

Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
---
 drivers/misc/habanalabs/device.c | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/drivers/misc/habanalabs/device.c b/drivers/misc/habanalabs/device.c
index 471506b54217..2677160c01b8 100644
--- a/drivers/misc/habanalabs/device.c
+++ b/drivers/misc/habanalabs/device.c
@@ -631,8 +631,6 @@ static void device_hard_reset_pending(struct work_struct *work)
 		container_of(work, struct hl_device_reset_work, reset_work);
 	struct hl_device *hdev = device_reset_work->hdev;
 
-	device_kill_open_processes(hdev);
-
 	hl_device_reset(hdev, true, true);
 
 	kfree(device_reset_work);
@@ -737,6 +735,13 @@ int hl_device_reset(struct hl_device *hdev, bool hard_reset,
 	/* Go over all the queues, release all CS and their jobs */
 	hl_cs_rollback_all(hdev);
 
+	/* Kill processes here after CS rollback. This is because the process
+	 * can't really exit until all its CSs are done, which is what we
+	 * do in cs rollback
+	 */
+	if (from_hard_reset_thread)
+		device_kill_open_processes(hdev);
+
 	/* Release kernel context */
 	if ((hard_reset) && (hl_ctx_put(hdev->kernel_ctx) == 1))
 		hdev->kernel_ctx = NULL;
@@ -1131,8 +1136,6 @@ void hl_device_fini(struct hl_device *hdev)
 
 	hdev->hard_reset_pending = true;
 
-	device_kill_open_processes(hdev);
-
 	hl_hwmon_fini(hdev);
 
 	device_late_fini(hdev);
@@ -1151,6 +1154,12 @@ void hl_device_fini(struct hl_device *hdev)
 	/* Go over all the queues, release all CS and their jobs */
 	hl_cs_rollback_all(hdev);
 
+	/* Kill processes here after CS rollback. This is because the process
+	 * can't really exit until all its CSs are done, which is what we
+	 * do in cs rollback
+	 */
+	device_kill_open_processes(hdev);
+
 	hl_cb_pool_fini(hdev);
 
 	/* Release kernel context */
-- 
2.17.1


  parent reply	other threads:[~2019-07-28 11:28 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-28 11:28 [PATCH 0/9] habanalabs: support open device by multiple processes Oded Gabbay
2019-07-28 11:28 ` [PATCH 1/9] habanalabs: add handle field to context structure Oded Gabbay
2019-07-28 11:28 ` [PATCH 2/9] habanalabs: verify context is valid in IOCTLs Oded Gabbay
2019-07-28 11:28 ` [PATCH 3/9] habanalabs: create context in lazy mode Oded Gabbay
2019-07-28 11:28 ` [PATCH 4/9] habanalabs: don't change frequency if user context is valid Oded Gabbay
2019-07-28 11:28 ` [PATCH 5/9] habanalabs: maintain a list of file private data objects Oded Gabbay
2019-07-28 11:28 ` [PATCH 6/9] habanalabs: define user context as compute context Oded Gabbay
2019-07-28 11:28 ` [PATCH 7/9] habanalabs: protect only pointer dereference in hard-reset Oded Gabbay
2019-07-28 11:28 ` Oded Gabbay [this message]
2019-07-28 11:28 ` [PATCH 9/9] habanalabs: allow multiple processes to open FD Oded Gabbay
2019-07-28 11:44   ` Greg KH
2019-07-28 11:56     ` Oded Gabbay
2019-07-28 12:04       ` Greg KH
2019-07-28 12:06         ` Oded Gabbay
2019-07-28 12:12           ` Greg KH
2019-07-28 12:18             ` Oded Gabbay

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20190728112818.30397-9-oded.gabbay@gmail.com \
    --to=oded.gabbay@gmail.com \
    --cc=gregkh@linuxfoundation.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=oshpigelman@habana.ai \
    --cc=ttayar@habana.ai \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).