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    <title>Whamcloud Community JIRA</title>
    <link>https://jira.whamcloud.com</link>
    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
        <version>9.4.14</version>
        <build-number>940014</build-number>
        <build-date>05-12-2023</build-date>
    </build-info>


<item>
            <title>[LU-9547] LBUG osp_dev.c:755:osp_statfs()) ASSERTION( sfs-&gt;os_fprecreated &lt;= OST_MAX_PRECREATE * 2 ) failed</title>
                <link>https://jira.whamcloud.com/browse/LU-9547</link>
                <project id="10000" key="LU">Lustre</project>
                    <description>&lt;p&gt;OSS failover completed 2017-05-23 02:45:41&lt;br/&gt;
While OST were remounting/recovering, MDT3 hit an LBUG:&lt;/p&gt;
&lt;div class=&quot;code panel&quot; style=&quot;border-width: 1px;&quot;&gt;&lt;div class=&quot;codeContent panelContent&quot;&gt;
&lt;pre class=&quot;code-java&quot;&gt;10) was lost; in progress operations using &lt;span class=&quot;code-keyword&quot;&gt;this&lt;/span&gt; service will wait &lt;span class=&quot;code-keyword&quot;&gt;for&lt;/span&gt; recovery to complete
May 23 02:45:06 soak-10 kernel: Lustre: Skipped 3 previous similar messages
May 23 02:45:11 soak-10 chronyd[1310]: Source 204.11.201.12 replaced with 198.58.110.84
May 23 02:45:19 soak-10 kernel: LustreError: 4833:0:(osp_dev.c:755:osp_statfs()) ASSERTION( sfs-&amp;gt;os_fprecreated &amp;lt;= OST_MAX_PRECREATE * 2 ) failed: last_created [0x540000401:0x2e43841:0x0], next_fid [0x540000401:0x2e43841:0x0], reserved 19
May 23 02:45:19 soak-10 kernel: LustreError: 4833:0:(osp_dev.c:755:osp_statfs()) LBUG
May 23 02:45:19 soak-10 kernel: Pid: 4833, comm: mdt00_016
May 23 02:45:19 soak-10 kernel: #012Call Trace:
May 23 02:45:19 soak-10 kernel: [&amp;lt;ffffffffa0bbe7ee&amp;gt;] libcfs_call_trace+0x4e/0x60 [libcfs]
May 23 02:45:19 soak-10 kernel: [&amp;lt;ffffffffa0bbe87c&amp;gt;] lbug_with_loc+0x4c/0xb0 [libcfs]
May 23 02:45:19 soak-10 kernel: [&amp;lt;ffffffffa14e7764&amp;gt;] osp_statfs+0x404/0x480 [osp]
May 23 02:45:19 soak-10 kernel: [&amp;lt;ffffffffa1443251&amp;gt;] lod_statfs_and_check+0xa1/0x580 [lod]
May 23 02:45:19 soak-10 kernel: [&amp;lt;ffffffffa1445154&amp;gt;] lod_alloc_rr.constprop.18+0x494/0x1000 [lod]
May 23 02:45:19 soak-10 kernel: [&amp;lt;ffffffffa1448979&amp;gt;] lod_qos_prep_create+0x12b9/0x17f0 [lod]
May 23 02:45:19 soak-10 kernel: [&amp;lt;ffffffffa1449428&amp;gt;] lod_prepare_create+0x298/0x3f0 [lod]
May 23 02:45:19 soak-10 kernel: [&amp;lt;ffffffffa143df8e&amp;gt;] lod_declare_striped_create+0x1ee/0x970 [lod]
May 23 02:45:19 soak-10 kernel: [&amp;lt;ffffffffa14404bc&amp;gt;] lod_declare_create+0x1fc/0x570 [lod]
May 23 02:45:19 soak-10 kernel: [&amp;lt;ffffffffa14ab97f&amp;gt;] mdd_declare_create_object_internal+0xdf/0x2f0 [mdd]
May 23 02:45:19 soak-10 kernel: [&amp;lt;ffffffffa149d2f3&amp;gt;] mdd_declare_create+0x53/0xe20 [mdd]
May 23 02:45:19 soak-10 kernel: [&amp;lt;ffffffffa0bc6574&amp;gt;] ? libcfs_log_return+0x24/0x30 [libcfs]
May 23 02:45:19 soak-10 kernel: [&amp;lt;ffffffffa14a10d9&amp;gt;] mdd_create+0x7c9/0x1330 [mdd]
May 23 02:45:19 soak-10 kernel: [&amp;lt;ffffffffa1377302&amp;gt;] mdt_reint_open+0x2192/0x31a0 [mdt]
May 23 02:45:19 soak-10 kernel: [&amp;lt;ffffffffa136c500&amp;gt;] mdt_reint_rec+0x80/0x210 [mdt]
May 23 02:45:19 soak-10 kernel: [&amp;lt;ffffffffa134e46b&amp;gt;] mdt_reint_internal+0x5fb/0x9c0 [mdt]
May 23 02:45:19 soak-10 kernel: [&amp;lt;ffffffffa134e992&amp;gt;] mdt_intent_reint+0x162/0x430 [mdt]
May 23 02:45:19 soak-10 kernel: [&amp;lt;ffffffffa135970e&amp;gt;] mdt_intent_policy+0x43e/0xc70 [mdt]
May 23 02:45:19 soak-10 kernel: [&amp;lt;ffffffffa0ee0167&amp;gt;] ldlm_lock_enqueue+0x387/0x970 [ptlrpc]
May 23 02:45:19 soak-10 kernel: [&amp;lt;ffffffffa0f09ab3&amp;gt;] ldlm_handle_enqueue0+0x9c3/0x1680 [ptlrpc]
May 23 02:45:19 soak-10 kernel: [&amp;lt;ffffffffa0bc9d87&amp;gt;] ? libcfs_debug_msg+0x57/0x80 [libcfs]
May 23 02:45:19 soak-10 kernel: [&amp;lt;ffffffffa0f8ef62&amp;gt;] tgt_enqueue+0x62/0x210 [ptlrpc]
May 23 02:45:19 soak-10 kernel: [&amp;lt;ffffffffa0f92225&amp;gt;] tgt_request_handle+0x915/0x1360 [ptlrpc]
May 23 02:45:19 soak-10 kernel: [&amp;lt;ffffffffa0f3b3e3&amp;gt;] ptlrpc_server_handle_request+0x233/0xa90 [ptlrpc]
May 23 02:45:19 soak-10 kernel: [&amp;lt;ffffffffa0f3f3f0&amp;gt;] ptlrpc_main+0xaa0/0x1dd0 [ptlrpc]
May 23 02:45:19 soak-10 kernel: [&amp;lt;ffffffffa0f3e950&amp;gt;] ? ptlrpc_main+0x0/0x1dd0 [ptlrpc]
May 23 02:45:19 soak-10 kernel: [&amp;lt;ffffffff810b0a4f&amp;gt;] kthread+0xcf/0xe0
May 23 02:45:19 soak-10 kernel: [&amp;lt;ffffffff810b0980&amp;gt;] ? kthread+0x0/0xe0
May 23 02:45:19 soak-10 kernel: [&amp;lt;ffffffff81697318&amp;gt;] ret_from_fork+0x58/0x90
May 23 02:45:19 soak-10 kernel: [&amp;lt;ffffffff810b0980&amp;gt;] ? kthread+0x0/0xe0
May 23 02:45:19 soak-10 kernel:
May 23 02:45:19 soak-10 kernel: LustreError: dumping log to /tmp/lustre-log.1495507519.4833
May 23 02:45:31 soak-10 kernel: LustreError: 11-0: soaked-OST0015-osc-MDT0002: operation obd_ping to node 192.168.1.104@o2ib10 failed: rc = -107
May 23 02:45:31 soak-10 kernel: Lustre: soaked-OST0015-osc-MDT0002: Connection to soaked-OST0015 (at 192.168.1.104@o2ib10) was lost; in progress operations using &lt;span class=&quot;code-keyword&quot;&gt;this&lt;/span&gt; service will wait &lt;span class=&quot;code-keyword&quot;&gt;for&lt;/span&gt; recovery to complete
May 23 02:45:31 soak-10 kernel: Lustre: Skipped 1 previous similar message
May 23 02:45:43 soak-10 kernel: NMI watchdog: BUG: soft lockup - CPU#1 stuck &lt;span class=&quot;code-keyword&quot;&gt;for&lt;/span&gt; 23s! [mdt00_006:4716]
&lt;/pre&gt;
&lt;/div&gt;&lt;/div&gt;

&lt;p&gt;System is crash dumping atm. Will attach. &lt;/p&gt;</description>
                <environment>Soak performance test cluster. Test patch for &lt;a href=&quot;https://jira.whamcloud.com/browse/LU-9504&quot; title=&quot;LBUG ptlrpc_handle_rs()) ASSERTION( lock != ((void *)0) ) failed&quot; class=&quot;issue-link&quot; data-issue-key=&quot;LU-9504&quot;&gt;&lt;strike&gt;LU-9504&lt;/strike&gt;&lt;/a&gt;. Lustre-reviews build 47608 - version=2.9.57_70_gfcd7bdd</environment>
        <key id="46265">LU-9547</key>
            <summary>LBUG osp_dev.c:755:osp_statfs()) ASSERTION( sfs-&gt;os_fprecreated &lt;= OST_MAX_PRECREATE * 2 ) failed</summary>
                <type id="1" iconUrl="https://jira.whamcloud.com/secure/viewavatar?size=xsmall&amp;avatarId=11303&amp;avatarType=issuetype">Bug</type>
                                            <priority id="2" iconUrl="https://jira.whamcloud.com/images/icons/priorities/critical.svg">Critical</priority>
                        <status id="5" iconUrl="https://jira.whamcloud.com/images/icons/statuses/resolved.png" description="A resolution has been taken, and it is awaiting verification by reporter. From here issues are either reopened, or are closed.">Resolved</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="5">Cannot Reproduce</resolution>
                                        <assignee username="wc-triage">WC Triage</assignee>
                                    <reporter username="cliffw">Cliff White</reporter>
                        <labels>
                            <label>soak</label>
                    </labels>
                <created>Tue, 23 May 2017 03:17:29 +0000</created>
                <updated>Fri, 7 Jul 2023 20:14:34 +0000</updated>
                            <resolved>Fri, 7 Jul 2023 20:14:34 +0000</resolved>
                                    <version>Lustre 2.10.0</version>
                                                        <due></due>
                            <votes>0</votes>
                                    <watches>5</watches>
                                                                            <comments>
                            <comment id="196700" author="bzzz" created="Tue, 23 May 2017 03:19:32 +0000"  >&lt;p&gt;this is fixed in the updated patch yet.&lt;/p&gt;</comment>
                            <comment id="196739" author="cliffw" created="Tue, 23 May 2017 14:06:43 +0000"  >&lt;p&gt;Which patch?&lt;/p&gt;</comment>
                            <comment id="241588" author="adilger" created="Fri, 8 Feb 2019 11:11:17 +0000"  >&lt;p&gt;I hit this while testing &lt;a href=&quot;https://jira.whamcloud.com/browse/LU-11912&quot; title=&quot;reduce number of OST objects created per MDS Sequence&quot; class=&quot;issue-link&quot; data-issue-key=&quot;LU-11912&quot;&gt;&lt;del&gt;LU-11912&lt;/del&gt;&lt;/a&gt; to reduce &lt;tt&gt;LUSTRE_DATA_SEQ_MAX_WIDTH = 0x1000&lt;/tt&gt; for testing the SEQ overflow handling.&lt;/p&gt;

&lt;p&gt;It looks like the problem is that when the sequence rolls over and &lt;tt&gt;osp_precreate_rollover_new_seq()&lt;/tt&gt; sets &lt;tt&gt;opd_pre_last_created_fid == opd_pre_used_fid&lt;/tt&gt; the &lt;tt&gt;opd_pre_reserved&lt;/tt&gt; value may be non-zero and is not changed.  This causes &lt;tt&gt;os_fprecreated&lt;/tt&gt; to go negative in &lt;tt&gt;osp_statfs()&lt;/tt&gt; (which is unsigned and becomes a large positive value) and trip the LASSERT().&lt;/p&gt;</comment>
                            <comment id="316779" author="adilger" created="Wed, 27 Oct 2021 22:26:50 +0000"  >&lt;p&gt;This may be resolved by patch &lt;a href=&quot;https://review.whamcloud.com/43248&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://review.whamcloud.com/43248&lt;/a&gt; &quot;&lt;tt&gt;&lt;a href=&quot;https://jira.whamcloud.com/browse/LU-14598&quot; title=&quot;Too many FIDs to precreate OST replaced. Wrong IDIF logic.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;LU-14598&quot;&gt;&lt;del&gt;LU-14598&lt;/del&gt;&lt;/a&gt; ofd: fix for IDIF sequence at ofd_preprw_write&lt;/tt&gt;&quot;&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10011">
                    <name>Related</name>
                                            <outwardlinks description="is related to ">
                                        <issuelink>
            <issuekey id="63719">LU-14598</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="54253">LU-11758</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="54735">LU-11912</issuekey>
        </issuelink>
                            </outwardlinks>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="46094">LU-9504</issuekey>
        </issuelink>
                            </inwardlinks>
                                    </issuelinktype>
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