Messages in this thread Patch in this message | ![/](/images/icornerl.gif) | | From | Sasha Levin <> | Subject | [PATCH AUTOSEL 4.19 4/5] cifs: add a warning when the in-flight count goes negative | Date | Mon, 26 Jun 2023 17:51:23 -0400 |
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From: Shyam Prasad N <sprasad@microsoft.com>
[ Upstream commit e4645cc2f1e2d6f268bb8dcfac40997c52432aed ]
We've seen the in-flight count go into negative with some internal stress testing in Microsoft.
Adding a WARN when this happens, in hope of understanding why this happens when it happens.
Signed-off-by: Shyam Prasad N <sprasad@microsoft.com> Reviewed-by: Bharath SM <bharathsm@microsoft.com> Signed-off-by: Steve French <stfrench@microsoft.com> Signed-off-by: Sasha Levin <sashal@kernel.org> --- fs/cifs/smb2ops.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index c07dcb2af2eb8..01ab4496cb897 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -79,6 +79,7 @@ smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add, *val = 65000; /* Don't get near 64K credits, avoid srv bugs */ printk_once(KERN_WARNING "server overflowed SMB3 credits\n"); } + WARN_ON_ONCE(server->in_flight == 0); server->in_flight--; if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP) rc = change_conf(server); -- 2.39.2
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