Whamcloud Community JIRA

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9.4.14

940014

05-12-2023

[LU-11435] add contention check and accounting for IBITS locks https://jira.whamcloud.com/browse/LU-11435 Lustre <p>Contention check is needed for IBITS locks too mainly for DOM locks but it also can be used in other cases like <a href="https://jira.whamcloud.com/browse/LU-9133" title="Use only MDS-local time when determining if directory is active" class="issue-link" data-issue-key="LU-9133">LU-9133</a> describes</p> LU-11435

add contention check and accounting for IBITS locks

Improvement Minor Closed Won't Do Mikhail Pershin Mikhail Pershin Wed, 26 Sep 2018 18:30:06 +0000 Sun, 16 Jan 2022 08:32:23 +0000 Sun, 16 Jan 2022 08:32:23 +0000 0 4 <p>this feature is also needed to properly switch client IO to lockless mode when needed.</p> <p>Mike Pershin (mpershin@whamcloud.com) uploaded a new patch: <a href="https://review.whamcloud.com/33243" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/33243</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-11435" title="add contention check and accounting for IBITS locks" class="issue-link" data-issue-key="LU-11435"><del>LU-11435</del></a> ldlm: add contention check for IBITS locks<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 5a3e446bec6714c1393ac88cfff42a70545d2c7e</p> <p>Mike Pershin (mpershin@whamcloud.com) uploaded a new patch: <a href="https://review.whamcloud.com/33244" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/33244</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-11435" title="add contention check and accounting for IBITS locks" class="issue-link" data-issue-key="LU-11435"><del>LU-11435</del></a> mdt: check lock contention for MDT IO locks<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 4325cbead61c1317f56b1dbc01e1dceb807244ea</p> <p>This was observed once on Jan 15th on master-next:</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>[40346.537877] Lustre: DEBUG MARKER: == sanity-dom test fsx: Dual-mount fsx with DoM files ================================================ 16:43:16 (1547588596) [40347.509286] LustreError: 11-0: lustre-MDT0000-mdc-ffff8802d13c5800: operation ldlm_enqueue to node 0@lo failed: rc = -87 [40347.533755] LustreError: 17033:0:(osc_cache.c:1147:osc_extent_make_ready()) ASSERTION( last->oap_page_off + last_oap_count <= ((1UL) << 12) ) failed: [40347.536029] LustreError: 17033:0:(osc_cache.c:1147:osc_extent_make_ready()) LBUG [40347.538039] Pid: 17033, comm: fsx 3.10.0-7.6-debug #1 SMP Wed Nov 7 21:55:08 EST 2018 [40347.543706] Call Trace: [40347.544629] [<ffffffffa02177dc>] libcfs_call_trace+0x8c/0xc0 [libcfs] [40347.546434] [<ffffffffa021788c>] lbug_with_loc+0x4c/0xa0 [libcfs] [40347.547963] [<ffffffffa07f739e>] osc_extent_make_ready+0xc3e/0xe70 [osc] [40347.549722] [<ffffffffa07f9a0f>] osc_io_unplug0+0xd9f/0x1920 [osc] [40347.550987] [<ffffffffa07fe540>] osc_cache_writeback_range+0xc20/0x1260 [osc] [40347.553316] [<ffffffffa08c41b7>] mdc_lock_flush+0x2e7/0x3f0 [mdc] [40347.555112] [<ffffffffa08c42fd>] mdc_lock_lockless_cancel+0x3d/0xf0 [mdc] [40347.556897] [<ffffffffa0398e65>] cl_lock_cancel+0x75/0x160 [obdclass] [40347.558872] [<ffffffffa08ef659>] lov_lock_cancel+0x99/0x190 [lov] [40347.560260] [<ffffffffa0398e65>] cl_lock_cancel+0x75/0x160 [obdclass] [40347.561984] [<ffffffffa0399352>] cl_lock_release+0x52/0x140 [obdclass] [40347.563531] [<ffffffffa039cd51>] cl_io_unlock+0x131/0x280 [obdclass] [40347.564861] [<ffffffffa039d7a5>] cl_io_loop+0xe5/0x1c0 [obdclass] [40347.566183] [<ffffffffa14b4b7b>] ll_file_io_generic+0x63b/0xcb0 [lustre] [40347.567974] [<ffffffffa14b5761>] ll_file_aio_write+0x391/0x840 [lustre] [40347.569329] [<ffffffffa14b5cb4>] ll_file_write+0xa4/0x170 [lustre] [40347.570629] [<ffffffff812362bd>] vfs_write+0xbd/0x1e0 [40347.572556] [<ffffffff812370bf>] SyS_write+0x7f/0xf0 [40347.585137] [<ffffffff817c4e15>] system_call_fastpath+0x1c/0x21 [40347.587908] [<ffffffffffffffff>] 0xffffffffffffffff </pre> </div></div> <p>Lockless code is outdated, see <a href="https://jira.whamcloud.com/browse/LU-14838" title="Remove old lockless code: Truncate & contention based lockless i/o" class="issue-link" data-issue-key="LU-14838"><del>LU-14838</del></a></p> Blocker LU-9133 Related LU-12079 Development Rank 1|i00367: Rank (Obsolete) 9223372036854775807