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b=MfIkMYtLCP5jTD2BXIdrN4ocbxLxBUkD/anYxpRol5F/YHrXmUAyubhaXkJ8qPe9y nsEbK3pR8KeBDAXzSaP0rk0n+xS1Vzz/te5B36kxImgAKr/y5LLQQoYeItSFzrCQJS kZLLzkkvsFDC9fcntU4Oj819Y5xcQm/4A5adQoD4uO859FRzXF6RkHaqHPfqtJq4lG Qg2bPMk2hhiT+ifUqes7hBKLml1hMjpQBzSD4m35DZsSe1GR0OTKFAIgBKl/9p6h3W zEYJ4qZckxsHMk907xBYP+Zz5KfcRXO3pBTS+XxEs8unAJXueAcm45vGLc85U+uEYn Z3dEqXSe1gIug== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id 298E8C05FD4; Wed, 1 Jun 2022 18:22:39 +0000 (UTC) From: bugzilla-daemon@kernel.org To: linux-f2fs-devel@lists.sourceforge.net Date: Wed, 01 Jun 2022 18:22:38 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: AssignedTo filesystem_f2fs@kernel-bugs.kernel.org X-Bugzilla-Product: File System X-Bugzilla-Component: f2fs X-Bugzilla-Version: 2.5 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: jaegeuk@kernel.org X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P1 X-Bugzilla-Assigned-To: filesystem_f2fs@kernel-bugs.kernel.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-Headers-End: 1nwSzY-0006Po-Bn Subject: [f2fs-dev] [Bug 216050] f2fs_gc occupies 100% cpu X-BeenThere: linux-f2fs-devel@lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net https://bugzilla.kernel.org/show_bug.cgi?id=216050 --- Comment #14 from Jaegeuk Kim (jaegeuk@kernel.org) --- Re #9, Thank you so much. f2fs_gc-254:2-1156 [013] ..... 22290.243361: f2fs_lookup_extent_tree_end: dev = (254,2), ino = 1409621, pgofs = 234, ext_info(fofs: 0, blk: 0, len: 0) f2fs_gc-254:2-1156 [013] ..... 22290.243362: f2fs_lookup_extent_tree_start: dev = (254,2), ino = 1409621, pgofs = 234 f2fs_gc-254:2-1156 [013] ..... 22290.243362: f2fs_lookup_extent_tree_end: dev = (254,2), ino = 1409621, pgofs = 234, ext_info(fofs: 0, blk: 0, len: 0) f2fs_gc-254:2-1156 [013] ..... 22290.243362: f2fs_lookup_extent_tree_start: dev = (254,2), ino = 1409621, pgofs = 234 f2fs_gc-254:2-1156 [013] ..... 22290.243362: f2fs_lookup_extent_tree_end: dev = (254,2), ino = 1409621, pgofs = 234, ext_info(fofs: 0, blk: 0, len: 0) f2fs_gc-254:2-1156 [013] ..... 22290.243362: f2fs_lookup_extent_tree_start: dev = (254,2), ino = 1409621, pgofs = 234 f2fs_gc-254:2-1156 [013] ..... 22290.243362: f2fs_lookup_extent_tree_end: dev = (254,2), ino = 1409621, pgofs = 234, ext_info(fofs: 0, blk: 0, len: 0) f2fs_gc-254:2-1156 [013] ..... 22290.243362: f2fs_lookup_extent_tree_start: dev = (254,2), ino = 1409621, pgofs = 234 It seems this disk is dm-2, since the extent hit count is something below. - Hit Ratio: 0% (38193 / 78044163449) I'm suspecting this flow, but not sure where it goes into a loop. f2fs_gc -> gc_data_segment -> f2fs_get_read_data_page -> f2fs_lookup_extent_cache -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug. _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel