From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F1B292641E7 for ; Thu, 17 Jul 2025 23:27:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752794875; cv=none; b=RKh1Y6JKv3wrif8/JxCg2lK7ZncbTanINZnwAQ/Ty/jMb0ZvjDHTyBi2hHkipqBl0U7YEk93MFGuYPB3AXmFt7MvSOPFmmH5p+2ownvGSXpZ7JPNcj1D+bDjw+GY/+Gxu8gDE46wnNbshLEryAqwqcgBPd1+6b1ft3R8lD+jDzs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752794875; c=relaxed/simple; bh=6q6GpnqnP3UQWRPRLuh4OJJosITMKP1u1WzXjs+UijU=; h=Date:Subject:From:To:Cc:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=nCB1u0OdcpzbciWV+yFXaPQGd8XP2kOtLdZWbnQ7PX2XukOOWJUtWVP5iFAOZ/TMVN2o11nzen5+bBRpeRhNCjphq6kdnMpr83zqBL19CjtbNKsl+ff97GkWNUUTM2vwukCSv3ugiOhlqHN7po1cefwYk45suHu0ay0keQSd9n4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=cCnP4caN; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="cCnP4caN" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 50EBCC4CEE3; Thu, 17 Jul 2025 23:27:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1752794874; bh=6q6GpnqnP3UQWRPRLuh4OJJosITMKP1u1WzXjs+UijU=; h=Date:Subject:From:To:Cc:In-Reply-To:References:From; b=cCnP4caNt18HDbP18cUVQEtv0bo4dq6noorrzs/PKMOYze5ys6MJb5HDVRaisuiYA zV9KFEF1aJdHyf8mzKeGpgQaZg21P6M5aMWeDPzgJ6//Ed7Mn8X38sB0lL9irsFr/5 1G4pnZdfXpv7zP03Of4PMxKWu9zTVTt35IaUAtzBV5I0Ue/7EkjYFy5VK8tXr9xqEi 8LSVEZI7LY28I5hpwJuUxdnjccOXXsfRU+E7MuYRFoIdIXTnxVfEoPSTZk2Jfr5Da6 CjxmsYAhypDqT4ciP6PdOfA50f8/LU6Uo+9swT/P+CzbVLbeVrirbvG/PqwppCbUzS XOFK7LwGzEc7A== Date: Thu, 17 Jul 2025 16:27:53 -0700 Subject: [PATCH 6/7] iomap: trace iomap_zero_iter zeroing activities From: "Darrick J. Wong" To: djwong@kernel.org Cc: linux-fsdevel@vger.kernel.org, neal@gompa.dev, John@groves.net, miklos@szeredi.hu, bernd@bsbernd.com, joannelkoong@gmail.com Message-ID: <175279449583.710975.17509678275524700377.stgit@frogsfrogsfrogs> In-Reply-To: <175279449418.710975.17923641852675480305.stgit@frogsfrogsfrogs> References: <175279449418.710975.17923641852675480305.stgit@frogsfrogsfrogs> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: Darrick J. Wong Trace which bytes actually get zeroed. Signed-off-by: "Darrick J. Wong" --- fs/iomap/trace.h | 1 + fs/iomap/buffered-io.c | 3 +++ 2 files changed, 4 insertions(+) diff --git a/fs/iomap/trace.h b/fs/iomap/trace.h index 455cc6f90be031..c71e432d96bcdb 100644 --- a/fs/iomap/trace.h +++ b/fs/iomap/trace.h @@ -84,6 +84,7 @@ DEFINE_RANGE_EVENT(iomap_release_folio); DEFINE_RANGE_EVENT(iomap_invalidate_folio); DEFINE_RANGE_EVENT(iomap_dio_invalidate_fail); DEFINE_RANGE_EVENT(iomap_dio_rw_queued); +DEFINE_RANGE_EVENT(iomap_zero_iter); #define IOMAP_TYPE_STRINGS \ { IOMAP_HOLE, "HOLE" }, \ diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index f526d634bfeda5..53324b0222de6b 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -1400,6 +1400,9 @@ static int iomap_zero_iter(struct iomap_iter *iter, bool *did_zero) /* warn about zeroing folios beyond eof that won't write back */ WARN_ON_ONCE(folio_pos(folio) > iter->inode->i_size); + trace_iomap_zero_iter(iter->inode, folio_pos(folio) + offset, + bytes); + folio_zero_range(folio, offset, bytes); folio_mark_accessed(folio);