diff options
Diffstat (limited to 'meta/recipes-kernel/lttng/lttng-modules/0004-fix-ext4-limit-the-length-of-per-inode-prealloc-list.patch')
| -rw-r--r-- | meta/recipes-kernel/lttng/lttng-modules/0004-fix-ext4-limit-the-length-of-per-inode-prealloc-list.patch | 84 |
1 files changed, 0 insertions, 84 deletions
diff --git a/meta/recipes-kernel/lttng/lttng-modules/0004-fix-ext4-limit-the-length-of-per-inode-prealloc-list.patch b/meta/recipes-kernel/lttng/lttng-modules/0004-fix-ext4-limit-the-length-of-per-inode-prealloc-list.patch deleted file mode 100644 index e29c07252c..0000000000 --- a/meta/recipes-kernel/lttng/lttng-modules/0004-fix-ext4-limit-the-length-of-per-inode-prealloc-list.patch +++ /dev/null @@ -1,84 +0,0 @@ -From 8fe742807e65af29dac3fea568ff93cbc5dd9a56 Mon Sep 17 00:00:00 2001 -From: Michael Jeanson <mjeanson@efficios.com> -Date: Mon, 24 Aug 2020 15:26:04 -0400 -Subject: [PATCH 04/10] fix: ext4: limit the length of per-inode prealloc list - (v5.9) -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -See upstream commit: - - commit 27bc446e2def38db3244a6eb4bb1d6312936610a - Author: brookxu <brookxu.cn@gmail.com> - Date: Mon Aug 17 15:36:15 2020 +0800 - - ext4: limit the length of per-inode prealloc list - - In the scenario of writing sparse files, the per-inode prealloc list may - be very long, resulting in high overhead for ext4_mb_use_preallocated(). - To circumvent this problem, we limit the maximum length of per-inode - prealloc list to 512 and allow users to modify it. - - After patching, we observed that the sys ratio of cpu has dropped, and - the system throughput has increased significantly. We created a process - to write the sparse file, and the running time of the process on the - fixed kernel was significantly reduced, as follows: - - Running time on unfixed kernel： - [root@TENCENT64 ~]# time taskset 0x01 ./sparse /data1/sparce.dat - real 0m2.051s - user 0m0.008s - sys 0m2.026s - - Running time on fixed kernel： - [root@TENCENT64 ~]# time taskset 0x01 ./sparse /data1/sparce.dat - real 0m0.471s - user 0m0.004s - sys 0m0.395s - -Upstream-Status: Backport - -Signed-off-by: Michael Jeanson <mjeanson@efficios.com> -Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> -Change-Id: I5169cb24853d4da32e2862a6626f1f058689b053 ---- - instrumentation/events/lttng-module/ext4.h | 15 +++++++++++++++ - 1 file changed, 15 insertions(+) - -diff --git a/instrumentation/events/lttng-module/ext4.h b/instrumentation/events/lttng-module/ext4.h -index 5f7ab28..72ad4c9 100644 ---- a/instrumentation/events/lttng-module/ext4.h -+++ b/instrumentation/events/lttng-module/ext4.h -@@ -460,6 +460,20 @@ LTTNG_TRACEPOINT_EVENT(ext4_mb_release_group_pa, - ) - #endif - -+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,9,0)) -+LTTNG_TRACEPOINT_EVENT(ext4_discard_preallocations, -+ TP_PROTO(struct inode *inode, unsigned int len, unsigned int needed), -+ -+ TP_ARGS(inode, len, needed), -+ -+ TP_FIELDS( -+ ctf_integer(dev_t, dev, inode->i_sb->s_dev) -+ ctf_integer(ino_t, ino, inode->i_ino) -+ ctf_integer(unsigned int, len, len) -+ ctf_integer(unsigned int, needed, needed) -+ ) -+) -+#else - LTTNG_TRACEPOINT_EVENT(ext4_discard_preallocations, - TP_PROTO(struct inode *inode), - -@@ -470,6 +484,7 @@ LTTNG_TRACEPOINT_EVENT(ext4_discard_preallocations, - ctf_integer(ino_t, ino, inode->i_ino) - ) - ) -+#endif - - LTTNG_TRACEPOINT_EVENT(ext4_mb_discard_preallocations, - TP_PROTO(struct super_block *sb, int needed), --- -2.19.1 - |