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Mon, 1 Dec 2025 20:46:27 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 51B74C4CEF1; Mon, 1 Dec 2025 20:46:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1764621987; bh=/DukttgQq+fnd7sr4F+v+pnvBseFz/+BLRtfeAdQZ3I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GeRQmrpqhtZZK/TU8bDtAbVtJlfpIr1AgfP27HjrPhAs6L7Bad6vwMRwcZRJ/odB7 MFw8JifBHt33LCMp6BE0xxbz4sWZVeSH9pFypsVnCHnTzwwiEsiX8V2rwGdEuD0XeL rAygT3zWP2yPqv9lBKmFX9GzvxQI06f0J1rRAWxZIkXgIzugb/ciGI5bZFHPvrqj0/ NdM5+vfw3CGXqebNd+wBa7US1xRpwRGjaVz/gdqBJp6I1IOoCLB6sYSRv4uaLZlWxy VcuH/HGk7IlHo/7e4pllClmvot8NFfDC6w3l/XdabF9u++j7M5ZI1VdhYrR/mC9CDb FedfbBNgQKryA== To: linux-f2fs-devel@lists.sourceforge.net Date: Mon, 1 Dec 2025 20:46:19 +0000 Message-ID: <20251201204620.905318-2-jaegeuk@kernel.org> X-Mailer: git-send-email 2.52.0.107.ga0afd4fd5b-goog In-Reply-To: <20251201204620.905318-1-jaegeuk@kernel.org> References: <20251201204620.905318-1-jaegeuk@kernel.org> MIME-Version: 1.0 X-Headers-End: 1vQAn2-0000tr-Q4 Subject: [f2fs-dev] [PATCH 2/3] f2fs_io: add read test with mlock2 and madvise 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: , From: Jaegeuk Kim via Linux-f2fs-devel Reply-To: Jaegeuk Kim Cc: Jaegeuk Kim Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net Add a method to read out pages into unevictable mapping by mmap(), mlock2(), and madvise() Signed-off-by: Jaegeuk Kim --- tools/f2fs_io/f2fs_io.c | 24 +++++++++++++++++++++++- 1 file changed, 23 insertions(+), 1 deletion(-) diff --git a/tools/f2fs_io/f2fs_io.c b/tools/f2fs_io/f2fs_io.c index bc2e014d3911..d5e103f7b833 100644 --- a/tools/f2fs_io/f2fs_io.c +++ b/tools/f2fs_io/f2fs_io.c @@ -938,6 +938,7 @@ static void do_write_advice(int argc, char **argv, const struct cmd_desc *cmd) " dontcache: buffered IO + dontcache\n" \ " dio : direct IO\n" \ " mmap : mmap IO\n" \ +" madvise : mmap + mlock2 + madvise\n" \ " mlock : mmap + mlock\n" \ "advice can be\n" \ " 1 : set sequential|willneed\n" \ @@ -956,6 +957,7 @@ static void do_read(int argc, char **argv, const struct cmd_desc *cmd) int flags = 0; int do_mmap = 0; int do_mlock = 0; + int do_madvise = 0; int do_dontcache = 0; int fd, advice; @@ -979,6 +981,8 @@ static void do_read(int argc, char **argv, const struct cmd_desc *cmd) flags |= O_DIRECT; else if (!strcmp(argv[4], "mmap")) do_mmap = 1; + else if (!strcmp(argv[4], "madvise")) + do_madvise = 1; else if (!strcmp(argv[4], "mlock")) do_mlock = 1; else if (!strcmp(argv[4], "dontcache")) @@ -1021,6 +1025,24 @@ static void do_read(int argc, char **argv, const struct cmd_desc *cmd) if (mlock(data, count * buf_size)) die_errno("mlock failed"); mlock_time_end = get_current_us(); + read_cnt = count * buf_size; + memcpy(print_buf, data, print_bytes); + } else if (do_madvise) { + data = mmap(NULL, count * buf_size, PROT_READ, + MAP_SHARED, fd, offset); + if (data == MAP_FAILED) + die("Mmap failed"); + + mlock_time_start = get_current_us(); + if (mlock2(data, count * buf_size, MLOCK_ONFAULT)) + die_errno("mlock2 failed"); + mlock_time_end = get_current_us(); + + io_time_start = get_current_us(); + if (madvise(data, count * buf_size, MADV_POPULATE_READ) != 0) + die_errno("madvise failed"); + io_time_end = get_current_us(); + read_cnt = count * buf_size; memcpy(print_buf, data, print_bytes); } else if (do_mlock) { @@ -1085,7 +1107,7 @@ static void do_read(int argc, char **argv, const struct cmd_desc *cmd) } if (do_mmap) { munmap(data, count * buf_size); - } else if (do_mlock) { + } else if (do_mlock || do_madvise) { munlock(data, count * buf_size); munmap(data, count * buf_size); } -- 2.52.0.107.ga0afd4fd5b-goog _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel