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GET /api/patches/2223185/?format=api
{ "id": 2223185, "url": "http://patchwork.ozlabs.org/api/patches/2223185/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-cifs-client/patch/20260414161805.233686-4-bharathsm@microsoft.com/", "project": { "id": 12, "url": "http://patchwork.ozlabs.org/api/projects/12/?format=api", "name": "Linux CIFS Client", "link_name": "linux-cifs-client", "list_id": "linux-cifs.vger.kernel.org", "list_email": "linux-cifs@vger.kernel.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260414161805.233686-4-bharathsm@microsoft.com>", "list_archive_url": null, "date": "2026-04-14T16:18:05", "name": "[4/4] smb: client: add tracepoints for deferred handle caching", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "49a2c71f84112859cb54b36711c8d4fd3a4a3654", "submitter": { "id": 86063, "url": "http://patchwork.ozlabs.org/api/people/86063/?format=api", "name": "Bharath SM", "email": "bharathsm.hsk@gmail.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-cifs-client/patch/20260414161805.233686-4-bharathsm@microsoft.com/mbox/", "series": [ { "id": 499868, "url": "http://patchwork.ozlabs.org/api/series/499868/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-cifs-client/list/?series=499868", "date": "2026-04-14T16:18:03", "name": "[1/4] smb: client: add tracepoints for lock operations", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/499868/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2223185/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2223185/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linux-cifs+bounces-10815-incoming=patchwork.ozlabs.org@vger.kernel.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linux-cifs@vger.kernel.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=gi/1H5Uf;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c0a:e001:db::12fc:5321; helo=sea.lore.kernel.org;\n envelope-from=linux-cifs+bounces-10815-incoming=patchwork.ozlabs.org@vger.kernel.org;\n receiver=patchwork.ozlabs.org)", "smtp.subspace.kernel.org;\n\tdkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com\n header.b=\"gi/1H5Uf\"", "smtp.subspace.kernel.org;\n arc=none smtp.client-ip=209.85.210.181", "smtp.subspace.kernel.org;\n dmarc=pass (p=none dis=none) header.from=gmail.com", "smtp.subspace.kernel.org;\n spf=pass smtp.mailfrom=gmail.com" ], "Received": [ "from sea.lore.kernel.org (sea.lore.kernel.org\n [IPv6:2600:3c0a:e001:db::12fc:5321])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fw8l566cLz1xtJ\n\tfor <incoming@patchwork.ozlabs.org>; Wed, 15 Apr 2026 02:25:21 +1000 (AEST)", "from smtp.subspace.kernel.org (conduit.subspace.kernel.org\n [100.90.174.1])\n\tby sea.lore.kernel.org (Postfix) with ESMTP id E3AA8301F325\n\tfor <incoming@patchwork.ozlabs.org>; Tue, 14 Apr 2026 16:18:33 +0000 (UTC)", "from localhost.localdomain (localhost.localdomain [127.0.0.1])\n\tby smtp.subspace.kernel.org (Postfix) with ESMTP id 783834315A;\n\tTue, 14 Apr 2026 16:18:33 +0000 (UTC)", "from mail-pf1-f181.google.com (mail-pf1-f181.google.com\n [209.85.210.181])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits))\n\t(No client certificate requested)\n\tby smtp.subspace.kernel.org (Postfix) with ESMTPS id 3C56B3E6396\n\tfor <linux-cifs@vger.kernel.org>; Tue, 14 Apr 2026 16:18:32 +0000 (UTC)", "by mail-pf1-f181.google.com with SMTP id\n d2e1a72fcca58-82a7ebc729dso2616980b3a.3\n for <linux-cifs@vger.kernel.org>;\n Tue, 14 Apr 2026 09:18:32 -0700 (PDT)", "from bharathsm-Virtual-Machine.. 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"AeBDievn6aSgszqRSOQCfNIasDv4LJzNtyw5m8eFSM4C4+eXEmy2xvY8x1JVJ+VksjH\n\t02bZ6bPG07v0s+kabsHYCfywOFhZ6aHLEQZ10L3WWNds+b5mLT1UrCwcqO9v37C7tyyosHhh606\n\t2c7Go9la7uDauK59crWZay4aaF/s6c7bZ55X/FokpzHRojjtkIW8vSeeM3OnQ+5sQQ/RvByvN9S\n\tl/MT4EzmWhM7GJXXNS422bKbflVww0tZv/2HtulGj6CAL1KxgbLswwNyyglPG/sn/ALf51TF30p\n\t9LAPznQ/R7EbxX11qRoZ3UkmJIUUJk9jGOSogQsFGLbGSUHEsFEA90P/7plvFtNVk+0WFxUBP7h\n\t5SaEERIz3RMDeNglPv3oHvOrpbXioSsDQUbys0mx4wEWDvhmLUgEIs2jVgOUDOhkK4MeeFsWK15\n\tLL3lW3UY8DPfwft4j8vun/Vv+FgirtkYHjaqxjFAxkM6MmObZ/gTn2Ut8i6XiWPg==", "X-Received": "by 2002:a05:6a00:2918:b0:82a:6461:6d1e with SMTP id\n d2e1a72fcca58-82f0c26bb4emr20063608b3a.46.1776183511249;\n Tue, 14 Apr 2026 09:18:31 -0700 (PDT)", "From": "Bharath SM <bharathsm.hsk@gmail.com>", "X-Google-Original-From": "Bharath SM <bharathsm@microsoft.com>", "To": "linux-cifs@vger.kernel.org,\n\tsmfrench@gmail.com,\n\tsprasad@microsoft.com,\n\tpc@manguebit.com,\n\tematsumiya@suse.de,\n\thenrique.carvalho@suse.com,\n\tbharathsm@microsoft.com", "Subject": "[PATCH 4/4] smb: client: add tracepoints for deferred handle caching", "Date": "Tue, 14 Apr 2026 21:48:05 +0530", "Message-ID": "<20260414161805.233686-4-bharathsm@microsoft.com>", "X-Mailer": "git-send-email 2.48.1", "In-Reply-To": "<20260414161805.233686-1-bharathsm@microsoft.com>", "References": "<20260414161805.233686-1-bharathsm@microsoft.com>", "Precedence": "bulk", "X-Mailing-List": "linux-cifs@vger.kernel.org", "List-Id": "<linux-cifs.vger.kernel.org>", "List-Subscribe": "<mailto:linux-cifs+subscribe@vger.kernel.org>", "List-Unsubscribe": "<mailto:linux-cifs+unsubscribe@vger.kernel.org>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit" }, "content": "Add tracepoints to observe handle caching behavior.\n\nsmb3_open_cached: emitted when an open reuses a cached handle from\na previous deferred close, avoiding a network round-trip\n\nsmb3_close_cached: emitted when a close is deferred (handle cached\nfor potential reuse by subsequent opens)\n\nSigned-off-by: Bharath SM <bharathsm@microsoft.com>\n---\n fs/smb/client/file.c | 8 +++++++\n fs/smb/client/trace.h | 51 +++++++++++++++++++++++++++++++++++++++++++\n 2 files changed, 59 insertions(+)", "diff": "diff --git a/fs/smb/client/file.c b/fs/smb/client/file.c\nindex 4662592801b0..79819241ebfd 100644\n--- a/fs/smb/client/file.c\n+++ b/fs/smb/client/file.c\n@@ -1083,6 +1083,9 @@ int cifs_open(struct inode *inode, struct file *file)\n \t\trc = cfile ? 0 : -ENOENT;\n \t}\n \tif (rc == 0) {\n+\t\ttrace_smb3_open_cached(xid, tcon->tid, tcon->ses->Suid,\n+\t\t\t\t cfile->fid.persistent_fid,\n+\t\t\t\t file->f_flags, cfile->f_flags);\n \t\tfile->private_data = cfile;\n \t\tspin_lock(&CIFS_I(inode)->deferred_lock);\n \t\tcifs_del_deferred_close(cfile);\n@@ -1442,6 +1445,7 @@ int cifs_close(struct inode *inode, struct file *file)\n \tstruct cifsInodeInfo *cinode = CIFS_I(inode);\n \tstruct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);\n \tstruct cifs_deferred_close *dclose;\n+\tstruct cifs_tcon *tcon;\n \n \tcifs_fscache_unuse_inode_cookie(inode, file->f_mode & FMODE_WRITE);\n \n@@ -1468,6 +1472,10 @@ int cifs_close(struct inode *inode, struct file *file)\n \t\t\t\t\tcifsFileInfo_get(cfile);\n \t\t\t} else {\n \t\t\t\t/* Deferred close for files */\n+\t\t\t\ttcon = tlink_tcon(cfile->tlink);\n+\t\t\t\ttrace_smb3_close_cached(tcon->tid, tcon->ses->Suid,\n+\t\t\t\t\t\tcfile->fid.persistent_fid,\n+\t\t\t\t\t\tcifs_sb->ctx->closetimeo);\n \t\t\t\tqueue_delayed_work(deferredclose_wq,\n \t\t\t\t\t\t&cfile->deferred, cifs_sb->ctx->closetimeo);\n \t\t\t\tcfile->deferred_close_scheduled = true;\ndiff --git a/fs/smb/client/trace.h b/fs/smb/client/trace.h\nindex 57abf5fca26c..b99ec5a417fa 100644\n--- a/fs/smb/client/trace.h\n+++ b/fs/smb/client/trace.h\n@@ -1361,6 +1361,57 @@ DEFINE_EVENT(smb3_open_done_class, smb3_##name, \\\n DEFINE_SMB3_OPEN_DONE_EVENT(open_done);\n DEFINE_SMB3_OPEN_DONE_EVENT(posix_mkdir_done);\n \n+TRACE_EVENT(smb3_open_cached,\n+\tTP_PROTO(unsigned int xid,\n+\t\t__u32 tid,\n+\t\t__u64 sesid,\n+\t\t__u64 fid,\n+\t\tunsigned int oflags,\n+\t\tunsigned int cflags),\n+\tTP_ARGS(xid, tid, sesid, fid, oflags, cflags),\n+\tTP_STRUCT__entry(\n+\t\t__field(unsigned int, xid)\n+\t\t__field(__u32, tid)\n+\t\t__field(__u64, sesid)\n+\t\t__field(__u64, fid)\n+\t\t__field(unsigned int, oflags)\n+\t\t__field(unsigned int, cflags)\n+\t),\n+\tTP_fast_assign(\n+\t\t__entry->xid = xid;\n+\t\t__entry->tid = tid;\n+\t\t__entry->sesid = sesid;\n+\t\t__entry->fid = fid;\n+\t\t__entry->oflags = oflags;\n+\t\t__entry->cflags = cflags;\n+\t),\n+\tTP_printk(\"xid=%u sid=0x%llx tid=0x%x fid=0x%llx oflags=0x%x cflags=0x%x\",\n+\t\t__entry->xid, __entry->sesid, __entry->tid, __entry->fid,\n+\t\t__entry->oflags, __entry->cflags)\n+);\n+\n+TRACE_EVENT(smb3_close_cached,\n+\tTP_PROTO(__u32 tid,\n+\t\t__u64 sesid,\n+\t\t__u64 fid,\n+\t\tunsigned long delay_jiffies),\n+\tTP_ARGS(tid, sesid, fid, delay_jiffies),\n+\tTP_STRUCT__entry(\n+\t\t__field(__u32, tid)\n+\t\t__field(__u64, sesid)\n+\t\t__field(__u64, fid)\n+\t\t__field(unsigned long, delay_jiffies)\n+\t),\n+\tTP_fast_assign(\n+\t\t__entry->tid = tid;\n+\t\t__entry->sesid = sesid;\n+\t\t__entry->fid = fid;\n+\t\t__entry->delay_jiffies = delay_jiffies;\n+\t),\n+\tTP_printk(\"sid=0x%llx tid=0x%x fid=0x%llx delay_jiffies=%lu\",\n+\t\t__entry->sesid, __entry->tid, __entry->fid, __entry->delay_jiffies)\n+);\n+\n \n DECLARE_EVENT_CLASS(smb3_lease_done_class,\n \tTP_PROTO(__u32\tlease_state,\n", "prefixes": [ "4/4" ] }