From: Richard Weinberger <richard@nod.at>
To: wuchi.zero@gmail.com
Cc: "Rafał Miłecki" <zajec5@gmail.com>,
jack@suse.cz, tj@kernel.org, mszeredi@redhat.com,
sedat.dilek@gmail.com, axboe@fb.com, akpm@linux-foundation.org,
torvalds@linux-foundation.org, linux-mm <linux-mm@kvack.org>,
linux-mtd <linux-mtd@lists.infradead.org>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
linux-kernel <linux-kernel@vger.kernel.org>
Subject: Different writeback timing since v5.14
Date: Tue, 1 Mar 2022 11:11:57 +0100 (CET) [thread overview]
Message-ID: <2104629126.100059.1646129517209.JavaMail.zimbra@nod.at> (raw)
Hi!
Rafał and I discovered that page writeback on UBIFS behaves different since v5.14.
When a simple write, such as "echo foo > /mnt/ubibfs/bar.txt", happens it takes
a few seconds until writeback calls ubifs_writepage().
Before commit ab19939a6a50 ("mm/page-writeback: Fix performance when BDI's share of ratio is 0.")
it was 30 seconds (vm.dirty_expire_centisecs), after this change it happens after 5 seconds
(vm.dirty_writeback_centisecs).
Is this expected?
Just want to make sure that the said commit didn't uncover an UBIFS issue.
Thanks,
//richard
next reply other threads:[~2022-03-01 10:12 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-01 10:11 Richard Weinberger [this message]
2022-03-01 10:32 ` Jan Kara
2022-03-01 15:05 ` Richard Weinberger
2022-03-02 9:24 ` Jan Kara
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