From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AE062C433E0 for ; Fri, 19 Jun 2020 06:44:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8D4B3207DD for ; Fri, 19 Jun 2020 06:44:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727916AbgFSGon (ORCPT ); Fri, 19 Jun 2020 02:44:43 -0400 Received: from szxga05-in.huawei.com ([45.249.212.191]:6288 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725778AbgFSGom (ORCPT ); Fri, 19 Jun 2020 02:44:42 -0400 Received: from DGGEMS410-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id 12BC9E41FC8D72D46034; Fri, 19 Jun 2020 14:44:38 +0800 (CST) Received: from [10.134.22.195] (10.134.22.195) by smtp.huawei.com (10.3.19.210) with Microsoft SMTP Server (TLS) id 14.3.487.0; Fri, 19 Jun 2020 14:44:32 +0800 Subject: Re: [PATCH 1/5] f2fs: fix to wait page writeback before update To: Jaegeuk Kim CC: , , References: <20200618063625.110273-1-yuchao0@huawei.com> <20200618235932.GA227771@google.com> <20200619054922.GC227771@google.com> From: Chao Yu Message-ID: <3634ef79-5903-449d-0d52-3d5566481863@huawei.com> Date: Fri, 19 Jun 2020 14:44:31 +0800 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: <20200619054922.GC227771@google.com> Content-Type: text/plain; charset="windows-1252" Content-Language: en-US Content-Transfer-Encoding: 7bit X-Originating-IP: [10.134.22.195] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2020/6/19 13:49, Jaegeuk Kim wrote: > On 06/19, Chao Yu wrote: >> Hi Jaegeuk, >> >> On 2020/6/19 7:59, Jaegeuk Kim wrote: >>> Hi Chao, >>> >>> On 06/18, Chao Yu wrote: >>>> to make page content stable for special device like raid. >>> >>> Could you elaborate the problem a bit? >> >> Some devices like raid5 wants page content to be stable, because >> it will calculate parity info based page content, if page is not >> stable, parity info could be corrupted, result in data inconsistency >> in stripe. > > I don't get the point, since those pages are brand new pages which were not > modified before. If it's on writeback, we should not modify them regardless > of whatever raid configuration. For example, f2fs_new_node_page() waits for > writeback. Am I missing something? I think we should use f2fs_bug_on(, PageWriteback()) rather than f2fs_wait_on_page_writeback() for brand new page which is allocated just now. For other paths, we can keep rule that waiting for writeback before updating. How do you think? Thanks, > >> >> Thanks, >> >>> >>>> >>>> Signed-off-by: Chao Yu >>>> --- >>>> fs/f2fs/dir.c | 2 ++ >>>> fs/f2fs/extent_cache.c | 18 +++++++++--------- >>>> fs/f2fs/f2fs.h | 2 +- >>>> fs/f2fs/file.c | 1 + >>>> fs/f2fs/inline.c | 2 ++ >>>> fs/f2fs/inode.c | 3 +-- >>>> 6 files changed, 16 insertions(+), 12 deletions(-) >>>> >>>> diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c >>>> index d35976785e8c..91e86747a604 100644 >>>> --- a/fs/f2fs/dir.c >>>> +++ b/fs/f2fs/dir.c >>>> @@ -495,6 +495,8 @@ static int make_empty_dir(struct inode *inode, >>>> if (IS_ERR(dentry_page)) >>>> return PTR_ERR(dentry_page); >>>> >>>> + f2fs_bug_on(F2FS_I_SB(inode), PageWriteback(dentry_page)); >>>> + >>>> dentry_blk = page_address(dentry_page); >>>> >>>> make_dentry_ptr_block(NULL, &d, dentry_blk); >>>> diff --git a/fs/f2fs/extent_cache.c b/fs/f2fs/extent_cache.c >>>> index e60078460ad1..686c68b98610 100644 >>>> --- a/fs/f2fs/extent_cache.c >>>> +++ b/fs/f2fs/extent_cache.c >>>> @@ -325,9 +325,10 @@ static void __drop_largest_extent(struct extent_tree *et, >>>> } >>>> >>>> /* return true, if inode page is changed */ >>>> -static bool __f2fs_init_extent_tree(struct inode *inode, struct f2fs_extent *i_ext) >>>> +static void __f2fs_init_extent_tree(struct inode *inode, struct page *ipage) >>>> { >>>> struct f2fs_sb_info *sbi = F2FS_I_SB(inode); >>>> + struct f2fs_extent *i_ext = ipage ? &F2FS_INODE(ipage)->i_ext : NULL; >>>> struct extent_tree *et; >>>> struct extent_node *en; >>>> struct extent_info ei; >>>> @@ -335,16 +336,18 @@ static bool __f2fs_init_extent_tree(struct inode *inode, struct f2fs_extent *i_e >>>> if (!f2fs_may_extent_tree(inode)) { >>>> /* drop largest extent */ >>>> if (i_ext && i_ext->len) { >>>> + f2fs_wait_on_page_writeback(ipage, NODE, true, true); >>>> i_ext->len = 0; >>>> - return true; >>>> + set_page_dirty(ipage); >>>> + return; >>>> } >>>> - return false; >>>> + return; >>>> } >>>> >>>> et = __grab_extent_tree(inode); >>>> >>>> if (!i_ext || !i_ext->len) >>>> - return false; >>>> + return; >>>> >>>> get_extent_info(&ei, i_ext); >>>> >>>> @@ -360,17 +363,14 @@ static bool __f2fs_init_extent_tree(struct inode *inode, struct f2fs_extent *i_e >>>> } >>>> out: >>>> write_unlock(&et->lock); >>>> - return false; >>>> } >>>> >>>> -bool f2fs_init_extent_tree(struct inode *inode, struct f2fs_extent *i_ext) >>>> +void f2fs_init_extent_tree(struct inode *inode, struct page *ipage) >>>> { >>>> - bool ret = __f2fs_init_extent_tree(inode, i_ext); >>>> + __f2fs_init_extent_tree(inode, ipage); >>>> >>>> if (!F2FS_I(inode)->extent_tree) >>>> set_inode_flag(inode, FI_NO_EXTENT); >>>> - >>>> - return ret; >>>> } >>>> >>>> static bool f2fs_lookup_extent_tree(struct inode *inode, pgoff_t pgofs, >>>> diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h >>>> index b35a50f4953c..326c12fa0da5 100644 >>>> --- a/fs/f2fs/f2fs.h >>>> +++ b/fs/f2fs/f2fs.h >>>> @@ -3795,7 +3795,7 @@ struct rb_entry *f2fs_lookup_rb_tree_ret(struct rb_root_cached *root, >>>> bool f2fs_check_rb_tree_consistence(struct f2fs_sb_info *sbi, >>>> struct rb_root_cached *root); >>>> unsigned int f2fs_shrink_extent_tree(struct f2fs_sb_info *sbi, int nr_shrink); >>>> -bool f2fs_init_extent_tree(struct inode *inode, struct f2fs_extent *i_ext); >>>> +void f2fs_init_extent_tree(struct inode *inode, struct page *ipage); >>>> void f2fs_drop_extent_tree(struct inode *inode); >>>> unsigned int f2fs_destroy_extent_node(struct inode *inode); >>>> void f2fs_destroy_extent_tree(struct inode *inode); >>>> diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c >>>> index 3268f8dd59bb..1862073b96d2 100644 >>>> --- a/fs/f2fs/file.c >>>> +++ b/fs/f2fs/file.c >>>> @@ -1250,6 +1250,7 @@ static int __clone_blkaddrs(struct inode *src_inode, struct inode *dst_inode, >>>> f2fs_put_page(psrc, 1); >>>> return PTR_ERR(pdst); >>>> } >>>> + f2fs_wait_on_page_writeback(pdst, DATA, true, true); >>>> f2fs_copy_page(psrc, pdst); >>>> set_page_dirty(pdst); >>>> f2fs_put_page(pdst, 1); >>>> diff --git a/fs/f2fs/inline.c b/fs/f2fs/inline.c >>>> index dbade310dc79..4bcbc486c9e2 100644 >>>> --- a/fs/f2fs/inline.c >>>> +++ b/fs/f2fs/inline.c >>>> @@ -340,6 +340,8 @@ int f2fs_make_empty_inline_dir(struct inode *inode, struct inode *parent, >>>> struct f2fs_dentry_ptr d; >>>> void *inline_dentry; >>>> >>>> + f2fs_wait_on_page_writeback(ipage, NODE, true, true); >>>> + >>>> inline_dentry = inline_data_addr(inode, ipage); >>>> >>>> make_dentry_ptr_inline(inode, &d, inline_dentry); >>>> diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c >>>> index 44582a4db513..7c156eb26dd7 100644 >>>> --- a/fs/f2fs/inode.c >>>> +++ b/fs/f2fs/inode.c >>>> @@ -367,8 +367,7 @@ static int do_read_inode(struct inode *inode) >>>> fi->i_pino = le32_to_cpu(ri->i_pino); >>>> fi->i_dir_level = ri->i_dir_level; >>>> >>>> - if (f2fs_init_extent_tree(inode, &ri->i_ext)) >>>> - set_page_dirty(node_page); >>>> + f2fs_init_extent_tree(inode, node_page); >>>> >>>> get_inline_info(inode, ri); >>>> >>>> -- >>>> 2.18.0.rc1 >>> . >>> > . > From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0532BC433E0 for ; Fri, 19 Jun 2020 06:44:48 +0000 (UTC) Received: from lists.sourceforge.net (lists.sourceforge.net [216.105.38.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id CB878207DD for ; 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bh=Neulf99ApIbigjYGsUzypLmnbfcPqyl4HZo0BgkjqFc=; b=kaDxEYXKQ58uENZp4pYVcuFy99 ajzAA771xrvUSaFmosufbjbPdRbIW+yLKO8p9egXm89uQgMQqr7KX8l+FqVuasDzy+v/ccsF3mmUU Bf+/rxGn0zmsrNli46rJcE5C8aUv5SZi/+dWrlAQXZ7MEgSyuEsl6U42vIzN2WMHRPbw=; Received: from szxga05-in.huawei.com ([45.249.212.191] helo=huawei.com) by sfi-mx-4.v28.lw.sourceforge.com with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.92.2) id 1jmAlY-00Bf5g-M2 for linux-f2fs-devel@lists.sourceforge.net; Fri, 19 Jun 2020 06:44:46 +0000 Received: from DGGEMS410-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id 12BC9E41FC8D72D46034; Fri, 19 Jun 2020 14:44:38 +0800 (CST) Received: from [10.134.22.195] (10.134.22.195) by smtp.huawei.com (10.3.19.210) with Microsoft SMTP Server (TLS) id 14.3.487.0; Fri, 19 Jun 2020 14:44:32 +0800 To: Jaegeuk Kim References: <20200618063625.110273-1-yuchao0@huawei.com> <20200618235932.GA227771@google.com> <20200619054922.GC227771@google.com> From: Chao Yu Message-ID: <3634ef79-5903-449d-0d52-3d5566481863@huawei.com> Date: Fri, 19 Jun 2020 14:44:31 +0800 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: <20200619054922.GC227771@google.com> Content-Language: en-US X-Originating-IP: [10.134.22.195] X-CFilter-Loop: Reflected X-Headers-End: 1jmAlY-00Bf5g-M2 Subject: Re: [f2fs-dev] [PATCH 1/5] f2fs: fix to wait page writeback before update 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: , Cc: linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net On 2020/6/19 13:49, Jaegeuk Kim wrote: > On 06/19, Chao Yu wrote: >> Hi Jaegeuk, >> >> On 2020/6/19 7:59, Jaegeuk Kim wrote: >>> Hi Chao, >>> >>> On 06/18, Chao Yu wrote: >>>> to make page content stable for special device like raid. >>> >>> Could you elaborate the problem a bit? >> >> Some devices like raid5 wants page content to be stable, because >> it will calculate parity info based page content, if page is not >> stable, parity info could be corrupted, result in data inconsistency >> in stripe. > > I don't get the point, since those pages are brand new pages which were not > modified before. If it's on writeback, we should not modify them regardless > of whatever raid configuration. For example, f2fs_new_node_page() waits for > writeback. Am I missing something? I think we should use f2fs_bug_on(, PageWriteback()) rather than f2fs_wait_on_page_writeback() for brand new page which is allocated just now. For other paths, we can keep rule that waiting for writeback before updating. How do you think? Thanks, > >> >> Thanks, >> >>> >>>> >>>> Signed-off-by: Chao Yu >>>> --- >>>> fs/f2fs/dir.c | 2 ++ >>>> fs/f2fs/extent_cache.c | 18 +++++++++--------- >>>> fs/f2fs/f2fs.h | 2 +- >>>> fs/f2fs/file.c | 1 + >>>> fs/f2fs/inline.c | 2 ++ >>>> fs/f2fs/inode.c | 3 +-- >>>> 6 files changed, 16 insertions(+), 12 deletions(-) >>>> >>>> diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c >>>> index d35976785e8c..91e86747a604 100644 >>>> --- a/fs/f2fs/dir.c >>>> +++ b/fs/f2fs/dir.c >>>> @@ -495,6 +495,8 @@ static int make_empty_dir(struct inode *inode, >>>> if (IS_ERR(dentry_page)) >>>> return PTR_ERR(dentry_page); >>>> >>>> + f2fs_bug_on(F2FS_I_SB(inode), PageWriteback(dentry_page)); >>>> + >>>> dentry_blk = page_address(dentry_page); >>>> >>>> make_dentry_ptr_block(NULL, &d, dentry_blk); >>>> diff --git a/fs/f2fs/extent_cache.c b/fs/f2fs/extent_cache.c >>>> index e60078460ad1..686c68b98610 100644 >>>> --- a/fs/f2fs/extent_cache.c >>>> +++ b/fs/f2fs/extent_cache.c >>>> @@ -325,9 +325,10 @@ static void __drop_largest_extent(struct extent_tree *et, >>>> } >>>> >>>> /* return true, if inode page is changed */ >>>> -static bool __f2fs_init_extent_tree(struct inode *inode, struct f2fs_extent *i_ext) >>>> +static void __f2fs_init_extent_tree(struct inode *inode, struct page *ipage) >>>> { >>>> struct f2fs_sb_info *sbi = F2FS_I_SB(inode); >>>> + struct f2fs_extent *i_ext = ipage ? &F2FS_INODE(ipage)->i_ext : NULL; >>>> struct extent_tree *et; >>>> struct extent_node *en; >>>> struct extent_info ei; >>>> @@ -335,16 +336,18 @@ static bool __f2fs_init_extent_tree(struct inode *inode, struct f2fs_extent *i_e >>>> if (!f2fs_may_extent_tree(inode)) { >>>> /* drop largest extent */ >>>> if (i_ext && i_ext->len) { >>>> + f2fs_wait_on_page_writeback(ipage, NODE, true, true); >>>> i_ext->len = 0; >>>> - return true; >>>> + set_page_dirty(ipage); >>>> + return; >>>> } >>>> - return false; >>>> + return; >>>> } >>>> >>>> et = __grab_extent_tree(inode); >>>> >>>> if (!i_ext || !i_ext->len) >>>> - return false; >>>> + return; >>>> >>>> get_extent_info(&ei, i_ext); >>>> >>>> @@ -360,17 +363,14 @@ static bool __f2fs_init_extent_tree(struct inode *inode, struct f2fs_extent *i_e >>>> } >>>> out: >>>> write_unlock(&et->lock); >>>> - return false; >>>> } >>>> >>>> -bool f2fs_init_extent_tree(struct inode *inode, struct f2fs_extent *i_ext) >>>> +void f2fs_init_extent_tree(struct inode *inode, struct page *ipage) >>>> { >>>> - bool ret = __f2fs_init_extent_tree(inode, i_ext); >>>> + __f2fs_init_extent_tree(inode, ipage); >>>> >>>> if (!F2FS_I(inode)->extent_tree) >>>> set_inode_flag(inode, FI_NO_EXTENT); >>>> - >>>> - return ret; >>>> } >>>> >>>> static bool f2fs_lookup_extent_tree(struct inode *inode, pgoff_t pgofs, >>>> diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h >>>> index b35a50f4953c..326c12fa0da5 100644 >>>> --- a/fs/f2fs/f2fs.h >>>> +++ b/fs/f2fs/f2fs.h >>>> @@ -3795,7 +3795,7 @@ struct rb_entry *f2fs_lookup_rb_tree_ret(struct rb_root_cached *root, >>>> bool f2fs_check_rb_tree_consistence(struct f2fs_sb_info *sbi, >>>> struct rb_root_cached *root); >>>> unsigned int f2fs_shrink_extent_tree(struct f2fs_sb_info *sbi, int nr_shrink); >>>> -bool f2fs_init_extent_tree(struct inode *inode, struct f2fs_extent *i_ext); >>>> +void f2fs_init_extent_tree(struct inode *inode, struct page *ipage); >>>> void f2fs_drop_extent_tree(struct inode *inode); >>>> unsigned int f2fs_destroy_extent_node(struct inode *inode); >>>> void f2fs_destroy_extent_tree(struct inode *inode); >>>> diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c >>>> index 3268f8dd59bb..1862073b96d2 100644 >>>> --- a/fs/f2fs/file.c >>>> +++ b/fs/f2fs/file.c >>>> @@ -1250,6 +1250,7 @@ static int __clone_blkaddrs(struct inode *src_inode, struct inode *dst_inode, >>>> f2fs_put_page(psrc, 1); >>>> return PTR_ERR(pdst); >>>> } >>>> + f2fs_wait_on_page_writeback(pdst, DATA, true, true); >>>> f2fs_copy_page(psrc, pdst); >>>> set_page_dirty(pdst); >>>> f2fs_put_page(pdst, 1); >>>> diff --git a/fs/f2fs/inline.c b/fs/f2fs/inline.c >>>> index dbade310dc79..4bcbc486c9e2 100644 >>>> --- a/fs/f2fs/inline.c >>>> +++ b/fs/f2fs/inline.c >>>> @@ -340,6 +340,8 @@ int f2fs_make_empty_inline_dir(struct inode *inode, struct inode *parent, >>>> struct f2fs_dentry_ptr d; >>>> void *inline_dentry; >>>> >>>> + f2fs_wait_on_page_writeback(ipage, NODE, true, true); >>>> + >>>> inline_dentry = inline_data_addr(inode, ipage); >>>> >>>> make_dentry_ptr_inline(inode, &d, inline_dentry); >>>> diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c >>>> index 44582a4db513..7c156eb26dd7 100644 >>>> --- a/fs/f2fs/inode.c >>>> +++ b/fs/f2fs/inode.c >>>> @@ -367,8 +367,7 @@ static int do_read_inode(struct inode *inode) >>>> fi->i_pino = le32_to_cpu(ri->i_pino); >>>> fi->i_dir_level = ri->i_dir_level; >>>> >>>> - if (f2fs_init_extent_tree(inode, &ri->i_ext)) >>>> - set_page_dirty(node_page); >>>> + f2fs_init_extent_tree(inode, node_page); >>>> >>>> get_inline_info(inode, ri); >>>> >>>> -- >>>> 2.18.0.rc1 >>> . >>> > . > _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel