Re: [PATCH] block: Skip the folio lock if the folio is already dirty
From: Christoph Hellwig <hch@infradead.org>
Date: 2025-01-28 05:58:07
Also in:
linux-fsdevel, linux-mm
On Fri, Jan 24, 2025 at 10:51:02PM +0000, Matthew Wilcox (Oracle) wrote:
bio_for_each_folio_all(fi, bio) {
+ if (folio_test_dirty(fi.folio))
+ continue;Can you add a comment why this is safe (the answer probably is "folio dirtying through direct I/O is racy as hell anyway and we don't care") and desirable? Otherwise this looks great.