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Tue, 5 Mar 2024 22:16:03 +0000 (UTC) Received: from dovecot-director2.suse.de ([10.150.64.162]) by imap2.dmz-prg2.suse.org with ESMTPSA id CVprJqOZ52XsJgAAn2gu4w (envelope-from ) for ; Tue, 05 Mar 2024 22:16:03 +0000 From: Qu Wenruo To: linux-btrfs@vger.kernel.org Subject: [PATCH 0/2] btrfs: fix data corruption/hang/rsv leak in subpage zoned cases Date: Wed, 6 Mar 2024 08:45:35 +1030 Message-ID: X-Mailer: git-send-email 2.44.0 Precedence: bulk X-Mailing-List: linux-btrfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Level: * X-Spamd-Bar: + Authentication-Results: smtp-out2.suse.de; dkim=pass header.d=suse.com header.s=susede1 header.b=DyvLim9k X-Rspamd-Server: rspamd2.dmz-prg2.suse.org X-Spamd-Result: default: False [1.22 / 50.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; SPAMHAUS_XBL(0.00)[2a07:de40:b281:104:10:150:64:98:from]; R_MISSING_CHARSET(2.50)[]; TO_DN_NONE(0.00)[]; BROKEN_CONTENT_TYPE(1.50)[]; RCVD_COUNT_THREE(0.00)[3]; DKIM_TRACE(0.00)[suse.com:+]; MX_GOOD(-0.01)[]; NEURAL_HAM_SHORT(-0.20)[-1.000]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; BAYES_HAM(-0.27)[73.93%]; ARC_NA(0.00)[]; R_DKIM_ALLOW(-0.20)[suse.com:s=susede1]; FROM_HAS_DN(0.00)[]; DWL_DNSWL_MED(-2.00)[suse.com:dkim]; TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[linux-btrfs@vger.kernel.org]; RCPT_COUNT_ONE(0.00)[1]; DKIM_SIGNED(0.00)[suse.com:s=susede1]; MID_CONTAINS_FROM(1.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.com:dkim]; FUZZY_BLOCKED(0.00)[rspamd.com]; RCVD_TLS_ALL(0.00)[] X-Spam-Score: 1.22 X-Rspamd-Queue-Id: DA35920F85 X-Spam-Flag: NO [REPO] https://github.com/adam900710/linux/tree/subpage_delalloc The repo includes the subpage delalloc rework, or subpage zoned won't work at all. Although my previous subpage delalloc rework fixes quite a lot of crashes of subpage + zoned support, it's still pretty easy to cause rsv leak using single thread fsstress. It turns out that, it's not a simple problem of some rsv leak, but certain dirty data ranges never got written back and just skipped with its dirty flags cleared, no wonder that would lead to rsv leak. The root cause is again in the extent_write_locked_range() function doing weird subpage incompatible behaviors, especially when it clears the page dirty flag for the whole page, causing __extent_writepage_io() unable to locate any dirty ranges to be submitted. The first patch would solve the problem, meanwhile for the 2nd patch it's a cleanup, as we will never hit the error for current subpage + zoned cases. Qu Wenruo (2): btrfs: do not clear page dirty inside extent_write_locked_range() btrfs: make extent_write_locked_range() to handle subpage writeback correctly fs/btrfs/extent_io.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) -- 2.44.0