From: Li Xi <lixi@xxxxxxx>
The start/end groups of a thread is calculated according to the
thread number. But still, only one thread is used to check.
Signed-off-by: Li Xi <lixi@xxxxxxx>
Signed-off-by: Wang Shilong <wshilong@xxxxxxx>
---
e2fsck/pass1.c | 24 ++++++++++++++++++------
1 file changed, 18 insertions(+), 6 deletions(-)
diff --git a/e2fsck/pass1.c b/e2fsck/pass1.c
index 45915513..c676cbbc 100644
--- a/e2fsck/pass1.c
+++ b/e2fsck/pass1.c
@@ -2301,13 +2301,15 @@ static int e2fsck_pass1_merge_fs(ext2_filsys dest, ext2_filsys src)
static errcode_t e2fsck_pass1_thread_prepare(e2fsck_t global_ctx,
e2fsck_t *thread_ctx,
- int thread_index)
+ int thread_index,
+ int num_threads)
{
errcode_t retval;
e2fsck_t thread_context;
ext2_filsys thread_fs;
ext2_filsys global_fs = global_ctx->fs;
struct e2fsck_thread *tinfo;
+ dgrp_t average_group;
assert(global_ctx->inode_used_map == NULL);
assert(global_ctx->inode_dir_map == NULL);
@@ -2346,11 +2348,20 @@ static errcode_t e2fsck_pass1_thread_prepare(e2fsck_t global_ctx,
thread_context->thread_info.et_thread_index = thread_index;
set_up_logging(thread_context);
- assert(thread_index == 0);
+ /*
+ * Distribute work to multiple threads:
+ * Each thread work on fs->group_desc_count / nthread groups.
+ */
tinfo = &thread_context->thread_info;
- tinfo->et_group_start = 0;
- tinfo->et_group_next = 0;
- tinfo->et_group_end = thread_fs->group_desc_count;
+ average_group = thread_fs->group_desc_count / num_threads;
+ if (average_group == 0)
+ average_group = 1;
+ tinfo->et_group_start = average_group * thread_index;
+ if (thread_index == num_threads - 1)
+ tinfo->et_group_end = thread_fs->group_desc_count;
+ else
+ tinfo->et_group_end = average_group * (thread_index + 1);
+ tinfo->et_group_next = tinfo->et_group_start;
thread_context->fs = thread_fs;
*thread_ctx = thread_context;
@@ -2511,7 +2522,8 @@ static int e2fsck_pass1_threads_start(struct e2fsck_thread_info **pinfo,
for (i = 0; i < num_threads; i++) {
tmp_pinfo = &infos[i];
tmp_pinfo->eti_thread_index = i;
- retval = e2fsck_pass1_thread_prepare(global_ctx, &thread_ctx, i);
+ retval = e2fsck_pass1_thread_prepare(global_ctx, &thread_ctx,
+ i, num_threads);
if (retval) {
com_err(global_ctx->program_name, retval,
_("while preparing pass1 thread\n"));
--
2.25.4
