{"id":2230329,"url":"http://patchwork.ozlabs.org/api/1.1/patches/2230329/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-ext4/patch/177747214274.4107228.2148742246580255983.stgit@frogsfrogsfrogs/","project":{"id":8,"url":"http://patchwork.ozlabs.org/api/1.1/projects/8/?format=json","name":"Linux ext4 filesystem development","link_name":"linux-ext4","list_id":"linux-ext4.vger.kernel.org","list_email":"linux-ext4@vger.kernel.org","web_url":null,"scm_url":null,"webscm_url":null},"msgid":"<177747214274.4107228.2148742246580255983.stgit@frogsfrogsfrogs>","date":"2026-04-29T14:51:51","name":"[2/5] libext2fs: only flush affected blocks in unix_write_byte","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"7b06461c88eaaaa0bf4ac2814e114c77da4b9f45","submitter":{"id":77032,"url":"http://patchwork.ozlabs.org/api/1.1/people/77032/?format=json","name":"Darrick J. Wong","email":"djwong@kernel.org"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-ext4/patch/177747214274.4107228.2148742246580255983.stgit@frogsfrogsfrogs/mbox/","series":[{"id":502086,"url":"http://patchwork.ozlabs.org/api/1.1/series/502086/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-ext4/list/?series=502086","date":"2026-04-29T14:51:35","name":"[1/5] libext2fs: invalidate cached blocks when freeing them","version":1,"mbox":"http://patchwork.ozlabs.org/series/502086/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2230329/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2230329/checks/","tags":{},"headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-ext4@vger.kernel.org"],"Delivered-To":["patchwork-incoming@legolas.ozlabs.org","patchwork-incoming@ozlabs.org"],"Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=eKNf+hrD;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=ozlabs.org\n (client-ip=150.107.74.76; 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arc=none smtp.client-ip=10.30.226.201"],"DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org;\n\ts=k20201202; t=1777474311;\n\tbh=225/Iat5rTiduRfqL5FozIIZ6Jf/RUepA27A7FwcgQ4=;\n\th=Date:Subject:From:To:Cc:In-Reply-To:References:From;\n\tb=eKNf+hrDsp0vYpVvyziEDvLKSnrt1ruUtiR72IgeRsUIRZYt8p/aTtSMKVSTs4yli\n\t B1/R66ODQeO7RteUsLuqRBRJ+vWR32z6VGbJ1xdchvtGUGPrZP8ZU0K73dYBmbgp0r\n\t ov2xX7EWnUcDFTgpnBLgNYYdyCTkmRkame7pFE6bSobOZM8wdChkeLC+OATx+xr5we\n\t TMng0qB9tDZROehSmiLf7zgLBHCDtz21oqnbGRnqc4Fy7lxYEJoXHCu8R97yXMiX/Z\n\t WAFE6XtvUdRfN0scA7rzp1YnE7Qn1KKH+0KvgUlWC90MfaTMlneALINB3Td2T/tKLW\n\t wUfx4vkEg1BQg==","Date":"Wed, 29 Apr 2026 07:51:51 -0700","Subject":"[PATCH 2/5] libext2fs: only flush affected blocks in unix_write_byte","From":"\"Darrick J. Wong\" ","To":"tytso@mit.edu","Cc":"bernd@bsbernd.com, miklos@szeredi.hu, linux-ext4@vger.kernel.org,\n neal@gompa.dev, linux-fsdevel@vger.kernel.org, fuse-devel@lists.linux.dev,\n joannelkoong@gmail.com","Message-ID":"<177747214274.4107228.2148742246580255983.stgit@frogsfrogsfrogs>","In-Reply-To":"<177747214224.4107228.16300103064218258692.stgit@frogsfrogsfrogs>","References":"<177747214224.4107228.16300103064218258692.stgit@frogsfrogsfrogs>","Precedence":"bulk","X-Mailing-List":"linux-ext4@vger.kernel.org","List-Id":"","List-Subscribe":"","List-Unsubscribe":"","MIME-Version":"1.0","Content-Type":"text/plain; charset=\"utf-8\"","Content-Transfer-Encoding":"7bit","X-Spam-Status":"No, score=-1.2 required=5.0 tests=ARC_SIGNED,ARC_VALID,\n\tDKIMWL_WL_HIGH,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DMARC_PASS,\n\tMAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=disabled\n\tversion=4.0.1","X-Spam-Checker-Version":"SpamAssassin 4.0.1 (2024-03-25) on gandalf.ozlabs.org"},"content":"From: Darrick J. Wong \n\nThere's no need to invalidate the entire cache when writing a range of\nbytes to the device. The only ones we need to invalidate are the ones\nthat we're writing separately.\n\nSigned-off-by: \"Darrick J. Wong\" \n---\n lib/ext2fs/unix_io.c | 12 ++++++++++--\n 1 file changed, 10 insertions(+), 2 deletions(-)","diff":"diff --git a/lib/ext2fs/unix_io.c b/lib/ext2fs/unix_io.c\nindex 54bd4b5597ea9e..35c42c35f735a3 100644\n--- a/lib/ext2fs/unix_io.c\n+++ b/lib/ext2fs/unix_io.c\n@@ -1588,6 +1588,7 @@ static errcode_t unix_write_byte(io_channel channel, unsigned long offset,\n {\n \tstruct unix_private_data *data;\n \terrcode_t\tretval = 0;\n+\tunsigned long long bno, nbno;\n \tssize_t\t\tactual;\n \n \tEXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);\n@@ -1603,10 +1604,17 @@ static errcode_t unix_write_byte(io_channel channel, unsigned long offset,\n \n #ifndef NO_IO_CACHE\n \t/*\n-\t * Flush out the cache completely\n+\t * Flush all the dirty blocks, then invalidate the blocks we're about\n+\t * to write.\n \t */\n-\tif ((retval = flush_cached_blocks(channel, data, FLUSH_INVALIDATE)))\n+\tretval = flush_cached_blocks(channel, data, 0);\n+\tif (retval)\n \t\treturn retval;\n+\n+\tbno = offset / channel->block_size;\n+\tnbno = (offset + size + channel->block_size - 1) / channel->block_size;\n+\n+\tinvalidate_cached_blocks(channel, data, bno, nbno - bno);\n #endif\n \n \tif (lseek(data->dev, offset + data->offset, SEEK_SET) < 0)\n","prefixes":["2/5"]}