Hi, Zhou.
I have tested the increasing patch on 4T memory machine.
makedumpfile fails to dump vmcore, if there are about 384M memory in 2nd
kernel which is reserved by crashkernel=auto. But once the reserved
memory is enlarged up to 10G, makedumpfile can dump vmcore successfully.
The cache should be dropped before testing, otherwise makedumpfile will
fail to dump vmcore.
echo 3 > /proc/sys/vm/drop_caches
Maybe there is something cleanup we can do to avoid this.
Following is the result with different parameter for option
--num-threads.
makedumpfile -l --num-threads 128 --message-level 1 -d 31 /proc/vmcore a.128
real 5m34.116s
user 103m42.531s
sys 86m12.586s
makedumpfile -l --num-threads 64 --message-level 1 -d 31 /proc/vmcore a.64
real 3m29.544s
user 27m14.674s
sys 53m8.030s
makedumpfile -l --num-threads 32 --message-level 1 -d 31 /proc/vmcore a.32
real 2m50.565s
user 10m52.662s
sys 32m0.446s
makedumpfile -l --num-threads 16 --message-level 1 -d 31 /proc/vmcore a.16
real 2m27.999s
user 8m18.650s
sys 12m54.151s
makedumpfile -l --num-threads 8 --message-level 1 -d 31 /proc/vmcore a.8
real 2m27.136s
user 8m4.009s
sys 3m12.090s
makedumpfile -l --num-threads 4 --message-level 1 -d 31 /proc/vmcore a.4
real 2m43.739s
user 7m39.689s
sys 1m28.504s
makedumpfile -l --num-threads 0 --message-level 1 -d 31 /proc/vmcore a.0
real 3m46.531s
user 3m29.371s
sys 0m16.909s
makedumpfile.back -l --message-level 1 -d 31 /proc/vmcore a
real 3m55.712s
user 3m39.254s
sys 0m16.287s
Once the reserved memory is enlarged, makedumpfile works well with or
without this increaseing patch.
But there is an another issue I found during testing. makedumpfile may
hang in about 24%. And with option --num-threads 64, this issue is also
occured.
makedumpfile -l --num-threads 128 --message-level 1 -d 31 /proc/vmcore a.128
Excluding unnecessary pages : [100.0 %] |
Excluding unnecessary pages : [100.0 %] /
Excluding unnecessary pages : [100.0 %] -
Copying data : [ 11.2 %] |
Copying data : [ 12.4 %] -
Excluding unnecessary pages : [100.0 %] \
Excluding unnecessary pages : [100.0 %] |
Copying data : [ 23.6 %] -
Copying data : [ 24.4 %] /
Thanks
Minfei
On 03/18/16 at 01:48pm, "Zhou, Wenjian/???" wrote:
> On 03/18/2016 12:16 PM, Minfei Huang wrote:
> >On 03/18/16 at 10:46am, "Zhou, Wenjian/???" wrote:
> >>Hello Minfei,
> >>
> >>Since I can't produce the bug, I reviewed the patch and wrote an increment patch.
> >>Though there are some bugs in the increment patch,
> >>I wonder if the previous bug still exists with this patch.
> >>Could you help me confirm it?
> >
> >Ok. I will help verify this increasing patch.
> >
>
> Thank you very much.
>
> >>
> >>And I have another question.
> >>Did it only occur in patch v4?
> >
> >This issue doesn't exist in v3. I have pasted the test result with
> >--num-thread 32 in that thread.
> >
> >applied makedumpfile with option -d 31 --num-threads 32
> >real 3m3.533s
>
> Oh, then the patch in the previous mail may not work.
>
> I'm appreciated if you can also test the patch in this letter.
>
> I introduced semaphore to fix the bug in the v3.
> So I want to know if it is this which affects the result.
> The attached patch is based on v4, used to remove semaohore.
>
> --
> Thanks
> Zhou
>
> >
> >Thanks
> >Minfei
> >
> >>The previous patches almost have the same logic.
> >>
> >>--
> >>Thanks
> >>Zhou
> >>
> >>On 03/15/2016 02:34 PM, Minfei Huang wrote:
> >>>Hi, Zhou.
> >>>
> >>>I have applied this patch base on 1.5.9. There are several testcases I
> >>>have tested.
> >>>
> >>>- makedumpfile --num-threads 64 -d 31
> >>> real 0m0.010s
> >>> user 0m0.002s
> >>> sys 0m0.009s
> >>>
> >>>- makedumpfile --num-threads 31 -d 31
> >>> real 2m40.915s
> >>> user 10m50.900s
> >>> sys 23m9.664s
> >>>
> >>>makedumpfile --num-threads 30 -d 31
> >>> real 0m0.006s
> >>> user 0m0.002s
> >>> sys 0m0.004s
> >>>
> >>>makedumpfile --num-threads 32 -d 31
> >>> real 0m0.007s
> >>> user 0m0.002s
> >>> sys 0m0.005s
> >>>
> >>>- makedumpfile --num-threads 8 -d 31
> >>> real 2m32.692s
> >>> user 7m4.630s
> >>> sys 2m0.369s
> >>>
> >>>- makedumpfile --num-threads 1 -d 31
> >>> real 4m42.423s
> >>> user 7m27.153s
> >>> sys 0m22.490s
> >>>
> >>>- makedumpfile.orig -d 31
> >>> real 4m1.297s
> >>> user 3m39.696s
> >>> sys 0m15.200s
> >>>
> >>>This patch has a huge increment to the filter performance under 31. But
> >>>it is not stable, since makedumpfile fails to dump vmcore intermittently.
> >>>You can find the above test result, makedumpfile fails to dump vmcore
> >>>with option --num-threads 64, also it may occur with option
> >>>--number-threads 8.
> >>>
> >>>Thanks
> >>>Minfei
> >>>
> >>>On 03/09/16 at 08:27am, Zhou Wenjian wrote:
> >>>>v4:
> >>>> 1. fix a bug caused by the logic
> >>>>v3:
> >>>> 1. remove some unused variables
> >>>> 2. fix a bug caused by the wrong logic
> >>>> 3. fix a bug caused by optimising
> >>>> 4. improve more performance by using Minoru Usui's code
> >>>>
> >>>>multi-threads implementation will introduce extra cost when handling
> >>>>each page. The origin implementation will also do the extra work for
> >>>>filtered pages. So there is a big performance degradation in
> >>>>--num-threads -d 31.
> >>>>The new implementation won't do the extra work for filtered pages any
> >>>>more. So the performance of -d 31 is close to that of serial processing.
> >>>>
> >>>>The new implementation is just like the following:
> >>>> * The basic idea is producer producing page and consumer writing page.
> >>>> * Each producer have a page_flag_buf list which is used for storing
> >>>> page's description.
> >>>> * The size of page_flag_buf is little so it won't take too much memory.
> >>>> * And all producers will share a page_data_buf array which is
> >>>> used for storing page's compressed data.
> >>>> * The main thread is the consumer. It will find the next pfn and write
> >>>> it into file.
> >>>> * The next pfn is smallest pfn in all page_flag_buf.
> >>>>
> >>>>Signed-off-by: Minoru Usui <min-usui at ti.jp.nec.com>
> >>>>Signed-off-by: Zhou Wenjian <zhouwj-fnst at cn.fujitsu.com>
> >>>>---
> >>>> makedumpfile.c | 298 +++++++++++++++++++++++++++++++++++----------------------
> >>>> makedumpfile.h | 35 ++++---
> >>>> 2 files changed, 202 insertions(+), 131 deletions(-)
> >>>>
> >>>>diff --git a/makedumpfile.c b/makedumpfile.c
> >>>>index fa0b779..2b0864a 100644
> >>>>--- a/makedumpfile.c
> >>>>+++ b/makedumpfile.c
> >>>>@@ -3483,7 +3483,8 @@ initial_for_parallel()
> >>>> unsigned long page_data_buf_size;
> >>>> unsigned long limit_size;
> >>>> int page_data_num;
> >>>>- int i;
> >>>>+ struct page_flag *current;
> >>>>+ int i, j;
> >>>>
> >>>> len_buf_out = calculate_len_buf_out(info->page_size);
> >>>>
> >>>>@@ -3560,10 +3561,16 @@ initial_for_parallel()
> >>>>
> >>>> limit_size = (get_free_memory_size()
> >>>> - MAP_REGION * info->num_threads) * 0.6;
> >>>>+ if (limit_size < 0) {
> >>>>+ MSG("Free memory is not enough for multi-threads\n");
> >>>>+ return FALSE;
> >>>>+ }
> >>>>
> >>>> page_data_num = limit_size / page_data_buf_size;
> >>>>+ info->num_buffers = 3 * info->num_threads;
> >>>>
> >>>>- info->num_buffers = MIN(NUM_BUFFERS, page_data_num);
> >>>>+ info->num_buffers = MAX(info->num_buffers, NUM_BUFFERS);
> >>>>+ info->num_buffers = MIN(info->num_buffers, page_data_num);
> >>>>
> >>>> DEBUG_MSG("Number of struct page_data for produce/consume: %d\n",
> >>>> info->num_buffers);
> >>>>@@ -3588,6 +3595,36 @@ initial_for_parallel()
> >>>> }
> >>>>
> >>>> /*
> >>>>+ * initial page_flag for each thread
> >>>>+ */
> >>>>+ if ((info->page_flag_buf = malloc(sizeof(void *) * info->num_threads))
> >>>>+ == NULL) {
> >>>>+ MSG("Can't allocate memory for page_flag_buf. %s\n",
> >>>>+ strerror(errno));
> >>>>+ return FALSE;
> >>>>+ }
> >>>>+ memset(info->page_flag_buf, 0, sizeof(void *) * info->num_threads);
> >>>>+
> >>>>+ for (i = 0; i < info->num_threads; i++) {
> >>>>+ if ((info->page_flag_buf[i] = calloc(1, sizeof(struct page_flag))) == NULL) {
> >>>>+ MSG("Can't allocate memory for page_flag. %s\n",
> >>>>+ strerror(errno));
> >>>>+ return FALSE;
> >>>>+ }
> >>>>+ current = info->page_flag_buf[i];
> >>>>+
> >>>>+ for (j = 1; j < NUM_BUFFERS; j++) {
> >>>>+ if ((current->next = calloc(1, sizeof(struct page_flag))) == NULL) {
> >>>>+ MSG("Can't allocate memory for page_flag. %s\n",
> >>>>+ strerror(errno));
> >>>>+ return FALSE;
> >>>>+ }
> >>>>+ current = current->next;
> >>>>+ }
> >>>>+ current->next = info->page_flag_buf[i];
> >>>>+ }
> >>>>+
> >>>>+ /*
> >>>> * initial fd_memory for threads
> >>>> */
> >>>> for (i = 0; i < info->num_threads; i++) {
> >>>>@@ -3612,7 +3649,8 @@ initial_for_parallel()
> >>>> void
> >>>> free_for_parallel()
> >>>> {
> >>>>- int i;
> >>>>+ int i, j;
> >>>>+ struct page_flag *current;
> >>>>
> >>>> if (info->threads != NULL) {
> >>>> for (i = 0; i < info->num_threads; i++) {
> >>>>@@ -3655,6 +3693,19 @@ free_for_parallel()
> >>>> free(info->page_data_buf);
> >>>> }
> >>>>
> >>>>+ if (info->page_flag_buf != NULL) {
> >>>>+ for (i = 0; i < info->num_threads; i++) {
> >>>>+ for (j = 0; j < NUM_BUFFERS; j++) {
> >>>>+ if (info->page_flag_buf[i] != NULL) {
> >>>>+ current = info->page_flag_buf[i];
> >>>>+ info->page_flag_buf[i] = current->next;
> >>>>+ free(current);
> >>>>+ }
> >>>>+ }
> >>>>+ }
> >>>>+ free(info->page_flag_buf);
> >>>>+ }
> >>>>+
> >>>> if (info->parallel_info == NULL)
> >>>> return;
> >>>>
> >>>>@@ -7075,11 +7126,11 @@ void *
> >>>> kdump_thread_function_cyclic(void *arg) {
> >>>> void *retval = PTHREAD_FAIL;
> >>>> struct thread_args *kdump_thread_args = (struct thread_args *)arg;
> >>>>- struct page_data *page_data_buf = kdump_thread_args->page_data_buf;
> >>>>+ volatile struct page_data *page_data_buf = kdump_thread_args->page_data_buf;
> >>>>+ volatile struct page_flag *page_flag_buf = kdump_thread_args->page_flag_buf;
> >>>> struct cycle *cycle = kdump_thread_args->cycle;
> >>>>- int page_data_num = kdump_thread_args->page_data_num;
> >>>>- mdf_pfn_t pfn;
> >>>>- int index;
> >>>>+ mdf_pfn_t pfn = cycle->start_pfn;
> >>>>+ int index = kdump_thread_args->thread_num;
> >>>> int buf_ready;
> >>>> int dumpable;
> >>>> int fd_memory = 0;
> >>>>@@ -7125,47 +7176,48 @@ kdump_thread_function_cyclic(void *arg) {
> >>>> kdump_thread_args->thread_num);
> >>>> }
> >>>>
> >>>>- while (1) {
> >>>>- /* get next pfn */
> >>>>- pthread_mutex_lock(&info->current_pfn_mutex);
> >>>>- pfn = info->current_pfn;
> >>>>- info->current_pfn++;
> >>>>- pthread_mutex_unlock(&info->current_pfn_mutex);
> >>>>-
> >>>>- if (pfn >= kdump_thread_args->end_pfn)
> >>>>- break;
> >>>>-
> >>>>- index = -1;
> >>>>+ /*
> >>>>+ * filtered page won't take anything
> >>>>+ * unfiltered zero page will only take a page_flag_buf
> >>>>+ * unfiltered non-zero page will take a page_flag_buf and a page_data_buf
> >>>>+ */
> >>>>+ while (pfn < cycle->end_pfn) {
> >>>> buf_ready = FALSE;
> >>>>
> >>>>+ pthread_mutex_lock(&info->page_data_mutex);
> >>>>+ while (page_data_buf[index].used != FALSE) {
> >>>>+ index = (index + 1) % info->num_buffers;
> >>>>+ }
> >>>>+ page_data_buf[index].used = TRUE;
> >>>>+ pthread_mutex_unlock(&info->page_data_mutex);
> >>>>+
> >>>> while (buf_ready == FALSE) {
> >>>> pthread_testcancel();
> >>>>-
> >>>>- index = pfn % page_data_num;
> >>>>-
> >>>>- if (pfn - info->consumed_pfn > info->num_buffers)
> >>>>+ if (page_flag_buf->ready == FLAG_READY)
> >>>> continue;
> >>>>
> >>>>- if (page_data_buf[index].ready != 0)
> >>>>- continue;
> >>>>-
> >>>>- pthread_mutex_lock(&page_data_buf[index].mutex);
> >>>>-
> >>>>- if (page_data_buf[index].ready != 0)
> >>>>- goto unlock;
> >>>>-
> >>>>- buf_ready = TRUE;
> >>>>+ /* get next dumpable pfn */
> >>>>+ pthread_mutex_lock(&info->current_pfn_mutex);
> >>>>+ for (pfn = info->current_pfn; pfn < cycle->end_pfn; pfn++) {
> >>>>+ dumpable = is_dumpable(
> >>>>+ info->fd_bitmap ? &bitmap_parallel : info->bitmap2,
> >>>>+ pfn,
> >>>>+ cycle);
> >>>>+ if (dumpable)
> >>>>+ break;
> >>>>+ }
> >>>>+ info->current_pfn = pfn + 1;
> >>>>
> >>>>- page_data_buf[index].pfn = pfn;
> >>>>- page_data_buf[index].ready = 1;
> >>>>+ page_flag_buf->pfn = pfn;
> >>>>+ page_flag_buf->ready = FLAG_FILLING;
> >>>>+ pthread_mutex_unlock(&info->current_pfn_mutex);
> >>>>+ sem_post(&info->page_flag_buf_sem);
> >>>>
> >>>>- dumpable = is_dumpable(
> >>>>- info->fd_bitmap ? &bitmap_parallel : info->bitmap2,
> >>>>- pfn,
> >>>>- cycle);
> >>>>- page_data_buf[index].dumpable = dumpable;
> >>>>- if (!dumpable)
> >>>>- goto unlock;
> >>>>+ if (pfn >= cycle->end_pfn) {
> >>>>+ info->current_pfn = cycle->end_pfn;
> >>>>+ page_data_buf[index].used = FALSE;
> >>>>+ break;
> >>>>+ }
> >>>>
> >>>> if (!read_pfn_parallel(fd_memory, pfn, buf,
> >>>> &bitmap_memory_parallel,
> >>>>@@ -7178,11 +7230,11 @@ kdump_thread_function_cyclic(void *arg) {
> >>>>
> >>>> if ((info->dump_level & DL_EXCLUDE_ZERO)
> >>>> && is_zero_page(buf, info->page_size)) {
> >>>>- page_data_buf[index].zero = TRUE;
> >>>>- goto unlock;
> >>>>+ page_flag_buf->zero = TRUE;
> >>>>+ goto next;
> >>>> }
> >>>>
> >>>>- page_data_buf[index].zero = FALSE;
> >>>>+ page_flag_buf->zero = FALSE;
> >>>>
> >>>> /*
> >>>> * Compress the page data.
> >>>>@@ -7210,6 +7262,7 @@ kdump_thread_function_cyclic(void *arg) {
> >>>> page_data_buf[index].flags =
> >>>> DUMP_DH_COMPRESSED_LZO;
> >>>> page_data_buf[index].size = size_out;
> >>>>+
> >>>> memcpy(page_data_buf[index].buf, buf_out, size_out);
> >>>> #endif
> >>>> #ifdef USESNAPPY
> >>>>@@ -7232,12 +7285,14 @@ kdump_thread_function_cyclic(void *arg) {
> >>>> page_data_buf[index].size = info->page_size;
> >>>> memcpy(page_data_buf[index].buf, buf, info->page_size);
> >>>> }
> >>>>-unlock:
> >>>>- pthread_mutex_unlock(&page_data_buf[index].mutex);
> >>>>+ page_flag_buf->index = index;
> >>>>+ buf_ready = TRUE;
> >>>>+next:
> >>>>+ page_flag_buf->ready = FLAG_READY;
> >>>>+ page_flag_buf = page_flag_buf->next;
> >>>>
> >>>> }
> >>>> }
> >>>>-
> >>>> retval = NULL;
> >>>>
> >>>> fail:
> >>>>@@ -7265,14 +7320,15 @@ write_kdump_pages_parallel_cyclic(struct cache_data *cd_header,
> >>>> struct page_desc pd;
> >>>> struct timeval tv_start;
> >>>> struct timeval last, new;
> >>>>- unsigned long long consuming_pfn;
> >>>> pthread_t **threads = NULL;
> >>>> struct thread_args *kdump_thread_args = NULL;
> >>>> void *thread_result;
> >>>>- int page_data_num;
> >>>>+ int page_buf_num;
> >>>> struct page_data *page_data_buf = NULL;
> >>>> int i;
> >>>> int index;
> >>>>+ int end_count, consuming, check_count;
> >>>>+ mdf_pfn_t current_pfn, temp_pfn;
> >>>>
> >>>> if (info->flag_elf_dumpfile)
> >>>> return FALSE;
> >>>>@@ -7284,13 +7340,6 @@ write_kdump_pages_parallel_cyclic(struct cache_data *cd_header,
> >>>> goto out;
> >>>> }
> >>>>
> >>>>- res = pthread_mutex_init(&info->consumed_pfn_mutex, NULL);
> >>>>- if (res != 0) {
> >>>>- ERRMSG("Can't initialize consumed_pfn_mutex. %s\n",
> >>>>- strerror(res));
> >>>>- goto out;
> >>>>- }
> >>>>-
> >>>> res = pthread_mutex_init(&info->filter_mutex, NULL);
> >>>> if (res != 0) {
> >>>> ERRMSG("Can't initialize filter_mutex. %s\n", strerror(res));
> >>>>@@ -7314,36 +7363,23 @@ write_kdump_pages_parallel_cyclic(struct cache_data *cd_header,
> >>>> end_pfn = cycle->end_pfn;
> >>>>
> >>>> info->current_pfn = start_pfn;
> >>>>- info->consumed_pfn = start_pfn - 1;
> >>>>
> >>>> threads = info->threads;
> >>>> kdump_thread_args = info->kdump_thread_args;
> >>>>
> >>>>- page_data_num = info->num_buffers;
> >>>>+ page_buf_num = info->num_buffers;
> >>>> page_data_buf = info->page_data_buf;
> >>>>+ pthread_mutex_init(&info->page_data_mutex, NULL);
> >>>>+ sem_init(&info->page_flag_buf_sem, 0, 0);
> >>>>
> >>>>- for (i = 0; i < page_data_num; i++) {
> >>>>- /*
> >>>>- * producer will use pfn in page_data_buf to decide the
> >>>>- * consumed pfn
> >>>>- */
> >>>>- page_data_buf[i].pfn = start_pfn - 1;
> >>>>- page_data_buf[i].ready = 0;
> >>>>- res = pthread_mutex_init(&page_data_buf[i].mutex, NULL);
> >>>>- if (res != 0) {
> >>>>- ERRMSG("Can't initialize mutex of page_data_buf. %s\n",
> >>>>- strerror(res));
> >>>>- goto out;
> >>>>- }
> >>>>- }
> >>>>+ for (i = 0; i < page_buf_num; i++)
> >>>>+ page_data_buf[i].used = FALSE;
> >>>>
> >>>> for (i = 0; i < info->num_threads; i++) {
> >>>> kdump_thread_args[i].thread_num = i;
> >>>> kdump_thread_args[i].len_buf_out = len_buf_out;
> >>>>- kdump_thread_args[i].start_pfn = start_pfn;
> >>>>- kdump_thread_args[i].end_pfn = end_pfn;
> >>>>- kdump_thread_args[i].page_data_num = page_data_num;
> >>>> kdump_thread_args[i].page_data_buf = page_data_buf;
> >>>>+ kdump_thread_args[i].page_flag_buf = info->page_flag_buf[i];
> >>>> kdump_thread_args[i].cycle = cycle;
> >>>>
> >>>> res = pthread_create(threads[i], NULL,
> >>>>@@ -7356,55 +7392,88 @@ write_kdump_pages_parallel_cyclic(struct cache_data *cd_header,
> >>>> }
> >>>> }
> >>>>
> >>>>- consuming_pfn = start_pfn;
> >>>>- index = -1;
> >>>>+ end_count = 0;
> >>>>+ while (1) {
> >>>>+ consuming = 0;
> >>>>+ check_count = 0;
> >>>>
> >>>>- gettimeofday(&last, NULL);
> >>>>+ /*
> >>>>+ * The basic idea is producer producing page and consumer writing page.
> >>>>+ * Each producer have a page_flag_buf list which is used for storing page's description.
> >>>>+ * The size of page_flag_buf is little so it won't take too much memory.
> >>>>+ * And all producers will share a page_data_buf array which is used for storing page's compressed data.
> >>>>+ * The main thread is the consumer. It will find the next pfn and write it into file.
> >>>>+ * The next pfn is smallest pfn in all page_flag_buf.
> >>>>+ */
> >>>>+ sem_wait(&info->page_flag_buf_sem);
> >>>>+ gettimeofday(&last, NULL);
> >>>>+ while (1) {
> >>>>+ current_pfn = end_pfn;
> >>>>
> >>>>- while (consuming_pfn < end_pfn) {
> >>>>- index = consuming_pfn % page_data_num;
> >>>>+ /*
> >>>>+ * page_flag_buf is in circular linked list.
> >>>>+ * The array info->page_flag_buf[] records the current page_flag_buf in each thread's
> >>>>+ * page_flag_buf list.
> >>>>+ * consuming is used for recording in which thread the pfn is the smallest.
> >>>>+ * current_pfn is used for recording the value of pfn when checking the pfn.
> >>>>+ */
> >>>>+ for (i = 0; i < info->num_threads; i++) {
> >>>>+ if (info->page_flag_buf[i]->ready == FLAG_UNUSED)
> >>>>+ continue;
> >>>>+ temp_pfn = info->page_flag_buf[i]->pfn;
> >>>>
> >>>>- gettimeofday(&new, NULL);
> >>>>- if (new.tv_sec - last.tv_sec > WAIT_TIME) {
> >>>>- ERRMSG("Can't get data of pfn %llx.\n", consuming_pfn);
> >>>>- goto out;
> >>>>- }
> >>>>+ /*
> >>>>+ * count how many threads have reached the end.
> >>>>+ */
> >>>>+ if (temp_pfn >= end_pfn) {
> >>>>+ info->page_flag_buf[i]->ready = FLAG_UNUSED;
> >>>>+ end_count++;
> >>>>+ continue;
> >>>>+ }
> >>>>
> >>>>- /*
> >>>>- * check pfn first without mutex locked to reduce the time
> >>>>- * trying to lock the mutex
> >>>>- */
> >>>>- if (page_data_buf[index].pfn != consuming_pfn)
> >>>>- continue;
> >>>>+ if (current_pfn < temp_pfn)
> >>>>+ continue;
> >>>>
> >>>>- if (pthread_mutex_trylock(&page_data_buf[index].mutex) != 0)
> >>>>- continue;
> >>>>+ check_count++;
> >>>>+ consuming = i;
> >>>>+ current_pfn = temp_pfn;
> >>>>+ }
> >>>>
> >>>>- /* check whether the found one is ready to be consumed */
> >>>>- if (page_data_buf[index].pfn != consuming_pfn ||
> >>>>- page_data_buf[index].ready != 1) {
> >>>>- goto unlock;
> >>>>+ /*
> >>>>+ * If all the threads have reached the end, we will finish writing.
> >>>>+ */
> >>>>+ if (end_count >= info->num_threads)
> >>>>+ goto finish;
> >>>>+
> >>>>+ /*
> >>>>+ * If the page_flag_buf is not ready, the pfn recorded may be changed.
> >>>>+ * So we should recheck.
> >>>>+ */
> >>>>+ if (info->page_flag_buf[consuming]->ready != FLAG_READY) {
> >>>>+ gettimeofday(&new, NULL);
> >>>>+ if (new.tv_sec - last.tv_sec > WAIT_TIME) {
> >>>>+ ERRMSG("Can't get data of pfn.\n");
> >>>>+ goto out;
> >>>>+ }
> >>>>+ continue;
> >>>>+ }
> >>>>+
> >>>>+ if (current_pfn == info->page_flag_buf[consuming]->pfn)
> >>>>+ break;
> >>>> }
> >>>>
> >>>> if ((num_dumped % per) == 0)
> >>>> print_progress(PROGRESS_COPY, num_dumped, info->num_dumpable);
> >>>>
> >>>>- /* next pfn is found, refresh last here */
> >>>>- last = new;
> >>>>- consuming_pfn++;
> >>>>- info->consumed_pfn++;
> >>>>- page_data_buf[index].ready = 0;
> >>>>-
> >>>>- if (page_data_buf[index].dumpable == FALSE)
> >>>>- goto unlock;
> >>>>-
> >>>> num_dumped++;
> >>>>
> >>>>- if (page_data_buf[index].zero == TRUE) {
> >>>>+
> >>>>+ if (info->page_flag_buf[consuming]->zero == TRUE) {
> >>>> if (!write_cache(cd_header, pd_zero, sizeof(page_desc_t)))
> >>>> goto out;
> >>>> pfn_zero++;
> >>>> } else {
> >>>>+ index = info->page_flag_buf[consuming]->index;
> >>>> pd.flags = page_data_buf[index].flags;
> >>>> pd.size = page_data_buf[index].size;
> >>>> pd.page_flags = 0;
> >>>>@@ -7420,12 +7489,12 @@ write_kdump_pages_parallel_cyclic(struct cache_data *cd_header,
> >>>> */
> >>>> if (!write_cache(cd_page, page_data_buf[index].buf, pd.size))
> >>>> goto out;
> >>>>-
> >>>>+ page_data_buf[index].used = FALSE;
> >>>> }
> >>>>-unlock:
> >>>>- pthread_mutex_unlock(&page_data_buf[index].mutex);
> >>>>+ info->page_flag_buf[consuming]->ready = FLAG_UNUSED;
> >>>>+ info->page_flag_buf[consuming] = info->page_flag_buf[consuming]->next;
> >>>> }
> >>>>-
> >>>>+finish:
> >>>> ret = TRUE;
> >>>> /*
> >>>> * print [100 %]
> >>>>@@ -7463,15 +7532,9 @@ out:
> >>>> }
> >>>> }
> >>>>
> >>>>- if (page_data_buf != NULL) {
> >>>>- for (i = 0; i < page_data_num; i++) {
> >>>>- pthread_mutex_destroy(&page_data_buf[i].mutex);
> >>>>- }
> >>>>- }
> >>>>-
> >>>>+ sem_destroy(&info->page_flag_buf_sem);
> >>>> pthread_rwlock_destroy(&info->usemmap_rwlock);
> >>>> pthread_mutex_destroy(&info->filter_mutex);
> >>>>- pthread_mutex_destroy(&info->consumed_pfn_mutex);
> >>>> pthread_mutex_destroy(&info->current_pfn_mutex);
> >>>>
> >>>> return ret;
> >>>>@@ -7564,6 +7627,7 @@ write_kdump_pages_cyclic(struct cache_data *cd_header, struct cache_data *cd_pag
> >>>> num_dumped++;
> >>>> if (!read_pfn(pfn, buf))
> >>>> goto out;
> >>>>+
> >>>> filter_data_buffer(buf, pfn_to_paddr(pfn), info->page_size);
> >>>>
> >>>> /*
> >>>>diff --git a/makedumpfile.h b/makedumpfile.h
> >>>>index e0b5bbf..4b315c0 100644
> >>>>--- a/makedumpfile.h
> >>>>+++ b/makedumpfile.h
> >>>>@@ -44,6 +44,7 @@
> >>>> #include "print_info.h"
> >>>> #include "sadump_mod.h"
> >>>> #include <pthread.h>
> >>>>+#include <semaphore.h>
> >>>>
> >>>> /*
> >>>> * Result of command
> >>>>@@ -977,7 +978,7 @@ typedef unsigned long long int ulonglong;
> >>>> #define PAGE_DATA_NUM (50)
> >>>> #define WAIT_TIME (60 * 10)
> >>>> #define PTHREAD_FAIL ((void *)-2)
> >>>>-#define NUM_BUFFERS (50)
> >>>>+#define NUM_BUFFERS (20)
> >>>>
> >>>> struct mmap_cache {
> >>>> char *mmap_buf;
> >>>>@@ -985,28 +986,33 @@ struct mmap_cache {
> >>>> off_t mmap_end_offset;
> >>>> };
> >>>>
> >>>>+enum {
> >>>>+ FLAG_UNUSED,
> >>>>+ FLAG_READY,
> >>>>+ FLAG_FILLING
> >>>>+};
> >>>>+struct page_flag {
> >>>>+ mdf_pfn_t pfn;
> >>>>+ char zero;
> >>>>+ char ready;
> >>>>+ short index;
> >>>>+ struct page_flag *next;
> >>>>+};
> >>>>+
> >>>> struct page_data
> >>>> {
> >>>>- mdf_pfn_t pfn;
> >>>>- int dumpable;
> >>>>- int zero;
> >>>>- unsigned int flags;
> >>>> long size;
> >>>> unsigned char *buf;
> >>>>- pthread_mutex_t mutex;
> >>>>- /*
> >>>>- * whether the page_data is ready to be consumed
> >>>>- */
> >>>>- int ready;
> >>>>+ int flags;
> >>>>+ int used;
> >>>> };
> >>>>
> >>>> struct thread_args {
> >>>> int thread_num;
> >>>> unsigned long len_buf_out;
> >>>>- mdf_pfn_t start_pfn, end_pfn;
> >>>>- int page_data_num;
> >>>> struct cycle *cycle;
> >>>> struct page_data *page_data_buf;
> >>>>+ struct page_flag *page_flag_buf;
> >>>> };
> >>>>
> >>>> /*
> >>>>@@ -1295,11 +1301,12 @@ struct DumpInfo {
> >>>> pthread_t **threads;
> >>>> struct thread_args *kdump_thread_args;
> >>>> struct page_data *page_data_buf;
> >>>>+ struct page_flag **page_flag_buf;
> >>>>+ sem_t page_flag_buf_sem;
> >>>> pthread_rwlock_t usemmap_rwlock;
> >>>> mdf_pfn_t current_pfn;
> >>>> pthread_mutex_t current_pfn_mutex;
> >>>>- mdf_pfn_t consumed_pfn;
> >>>>- pthread_mutex_t consumed_pfn_mutex;
> >>>>+ pthread_mutex_t page_data_mutex;
> >>>> pthread_mutex_t filter_mutex;
> >>>> };
> >>>> extern struct DumpInfo *info;
> >>>>--
> >>>>1.8.3.1
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>_______________________________________________
> >>>>kexec mailing list
> >>>>kexec at lists.infradead.org
> >>>>http://lists.infradead.org/mailman/listinfo/kexec
> >>
> >>
> >>
> >
> >> From 1d7ad5dbbc29efe58171b1023ab0df09eb2815bf Mon Sep 17 00:00:00 2001
> >>From: Zhou Wenjian <zhouwj-fnst at cn.fujitsu.com>
> >>Date: Fri, 18 Mar 2016 10:35:35 +0800
> >>Subject: [PATCH] increment
> >>
> >>---
> >> makedumpfile.c | 107 ++++++++++++++++++++++++++++++++++++++++++---------------
> >> makedumpfile.h | 12 +++++--
> >> 2 files changed, 89 insertions(+), 30 deletions(-)
> >>
> >>diff --git a/makedumpfile.c b/makedumpfile.c
> >>index 2b0864a..a304a61 100644
> >>--- a/makedumpfile.c
> >>+++ b/makedumpfile.c
> >>@@ -3477,6 +3477,42 @@ calibrate_machdep_info(void)
> >> }
> >>
> >> int
> >>+initial_parallel_area(int page_data_buf_size)
> >>+{
> >>+ int i, j;
> >>+ struct page_flag *current;
> >>+ info->page_data_buf = info->parallel_area;
> >>+ void *page_data_buf = info->parallel_area + sizeof(struct page_data) * info->num_buffers;
> >>+ void *page_flag_list = page_data_buf + page_data_buf_size * info->num_buffers;
> >>+
> >>+ for (i = 0; i < info->num_buffers; i++) {
> >>+ info->page_data_buf[i].buf = page_data_buf + page_data_buf_size * i;
> >>+ }
> >>+
> >>+
> >>+ if ((info->page_flag_list = malloc(sizeof(struct page_flag_list) * info->num_threads))
> >>+ == NULL) {
> >>+ MSG("Can't allocate memory for page_flag_buf. %s\n",
> >>+ strerror(errno));
> >>+ return FALSE;
> >>+ }
> >>+
> >>+ for (i = 0; i < info->num_threads; i++) {
> >>+ info->page_flag_list[i].header = page_flag_list + sizeof(struct page_flag) * info->num_buffers * i;
> >>+ info->page_flag_list[i].current = 0;
> >>+ /*
> >>+ current = info->page_flag_buf[i];
> >>+ for (j = 1; j < info->num_buffers; j++) {
> >>+ current->next = current + sizeof(struct page_flag);
> >>+ current = current->next;
> >>+ }
> >>+ current->next = info->page_flag_buf[i];
> >>+*/
> >>+ }
> >>+
> >>+}
> >>+
> >>+int
> >> initial_for_parallel()
> >> {
> >> unsigned long len_buf_out;
> >>@@ -3575,9 +3611,15 @@ initial_for_parallel()
> >> DEBUG_MSG("Number of struct page_data for produce/consume: %d\n",
> >> info->num_buffers);
> >>
> >>- /*
> >>- * allocate memory for page_data
> >>- */
> >>+ if ((info->parallel_area = calloc(info->num_buffers, sizeof(struct page_data)+page_data_buf_size + sizeof(struct page_flag)*info->num_threads))
> >>+ ==NULL) {
> >>+ MSG("Can't allocate memory for page_data_buf. %s\n",
> >>+ strerror(errno));
> >>+ return FALSE;
> >>+ }
> >>+
> >>+ initial_parallel_area(page_data_buf_size);
> >>+/*
> >> if ((info->page_data_buf = malloc(sizeof(struct page_data) * info->num_buffers))
> >> == NULL) {
> >> MSG("Can't allocate memory for page_data_buf. %s\n",
> >>@@ -3594,9 +3636,6 @@ initial_for_parallel()
> >> }
> >> }
> >>
> >>- /*
> >>- * initial page_flag for each thread
> >>- */
> >> if ((info->page_flag_buf = malloc(sizeof(void *) * info->num_threads))
> >> == NULL) {
> >> MSG("Can't allocate memory for page_flag_buf. %s\n",
> >>@@ -3623,7 +3662,7 @@ initial_for_parallel()
> >> }
> >> current->next = info->page_flag_buf[i];
> >> }
> >>-
> >>+*/
> >> /*
> >> * initial fd_memory for threads
> >> */
> >>@@ -3685,6 +3724,15 @@ free_for_parallel()
> >> if (info->kdump_thread_args != NULL)
> >> free(info->kdump_thread_args);
> >>
> >>+ if (info->page_flag_list != NULL) {
> >>+ free(info->page_flag_list);
> >>+ }
> >>+
> >>+ if (info->parallel_area != NULL) {
> >>+ free(info->parallel_area);
> >>+ }
> >>+
> >>+/*
> >> if (info->page_data_buf != NULL) {
> >> for (i = 0; i < info->num_buffers; i++) {
> >> if (info->page_data_buf[i].buf != NULL)
> >>@@ -3705,7 +3753,7 @@ free_for_parallel()
> >> }
> >> free(info->page_flag_buf);
> >> }
> >>-
> >>+*/
> >> if (info->parallel_info == NULL)
> >> return;
> >>
> >>@@ -7122,12 +7170,14 @@ int finalize_zlib(z_stream *stream)
> >> return err;
> >> }
> >>
> >>+#define CURRENT_FLAG page_flag_header[current_page_flag]
> >> void *
> >> kdump_thread_function_cyclic(void *arg) {
> >> void *retval = PTHREAD_FAIL;
> >> struct thread_args *kdump_thread_args = (struct thread_args *)arg;
> >> volatile struct page_data *page_data_buf = kdump_thread_args->page_data_buf;
> >>- volatile struct page_flag *page_flag_buf = kdump_thread_args->page_flag_buf;
> >>+ struct page_flag *page_flag_header = kdump_thread_args->page_flag_list->header;
> >>+ int current_page_flag = kdump_thread_args->page_flag_list->current;
> >> struct cycle *cycle = kdump_thread_args->cycle;
> >> mdf_pfn_t pfn = cycle->start_pfn;
> >> int index = kdump_thread_args->thread_num;
> >>@@ -7193,7 +7243,7 @@ kdump_thread_function_cyclic(void *arg) {
> >>
> >> while (buf_ready == FALSE) {
> >> pthread_testcancel();
> >>- if (page_flag_buf->ready == FLAG_READY)
> >>+ if (CURRENT_FLAG.ready == FLAG_READY)
> >> continue;
> >>
> >> /* get next dumpable pfn */
> >>@@ -7208,8 +7258,8 @@ kdump_thread_function_cyclic(void *arg) {
> >> }
> >> info->current_pfn = pfn + 1;
> >>
> >>- page_flag_buf->pfn = pfn;
> >>- page_flag_buf->ready = FLAG_FILLING;
> >>+ CURRENT_FLAG.pfn = pfn;
> >>+ CURRENT_FLAG.ready = FLAG_FILLING;
> >> pthread_mutex_unlock(&info->current_pfn_mutex);
> >> sem_post(&info->page_flag_buf_sem);
> >>
> >>@@ -7230,11 +7280,11 @@ kdump_thread_function_cyclic(void *arg) {
> >>
> >> if ((info->dump_level & DL_EXCLUDE_ZERO)
> >> && is_zero_page(buf, info->page_size)) {
> >>- page_flag_buf->zero = TRUE;
> >>+ CURRENT_FLAG.zero = TRUE;
> >> goto next;
> >> }
> >>
> >>- page_flag_buf->zero = FALSE;
> >>+ CURRENT_FLAG.zero = FALSE;
> >>
> >> /*
> >> * Compress the page data.
> >>@@ -7285,11 +7335,11 @@ kdump_thread_function_cyclic(void *arg) {
> >> page_data_buf[index].size = info->page_size;
> >> memcpy(page_data_buf[index].buf, buf, info->page_size);
> >> }
> >>- page_flag_buf->index = index;
> >>+ CURRENT_FLAG.index = index;
> >> buf_ready = TRUE;
> >> next:
> >>- page_flag_buf->ready = FLAG_READY;
> >>- page_flag_buf = page_flag_buf->next;
> >>+ CURRENT_FLAG.ready = FLAG_READY;
> >>+ current_page_flag = (current_page_flag + 1) % info->num_buffers;
> >>
> >> }
> >> }
> >>@@ -7306,6 +7356,8 @@ fail:
> >> pthread_exit(retval);
> >> }
> >>
> >>+#define CURRENT_PAGE_FLAG(i) (info->page_flag_list[i].header)[info->page_flag_list[i].current]
> >>+
> >> int
> >> write_kdump_pages_parallel_cyclic(struct cache_data *cd_header,
> >> struct cache_data *cd_page,
> >>@@ -7379,7 +7431,7 @@ write_kdump_pages_parallel_cyclic(struct cache_data *cd_header,
> >> kdump_thread_args[i].thread_num = i;
> >> kdump_thread_args[i].len_buf_out = len_buf_out;
> >> kdump_thread_args[i].page_data_buf = page_data_buf;
> >>- kdump_thread_args[i].page_flag_buf = info->page_flag_buf[i];
> >>+ kdump_thread_args[i].page_flag_list = &(info->page_flag_list[i]);
> >> kdump_thread_args[i].cycle = cycle;
> >>
> >> res = pthread_create(threads[i], NULL,
> >>@@ -7418,15 +7470,15 @@ write_kdump_pages_parallel_cyclic(struct cache_data *cd_header,
> >> * current_pfn is used for recording the value of pfn when checking the pfn.
> >> */
> >> for (i = 0; i < info->num_threads; i++) {
> >>- if (info->page_flag_buf[i]->ready == FLAG_UNUSED)
> >>+ if (CURRENT_PAGE_FLAG(i).ready == FLAG_UNUSED)
> >> continue;
> >>- temp_pfn = info->page_flag_buf[i]->pfn;
> >>+ temp_pfn = CURRENT_PAGE_FLAG(i).pfn;
> >>
> >> /*
> >> * count how many threads have reached the end.
> >> */
> >> if (temp_pfn >= end_pfn) {
> >>- info->page_flag_buf[i]->ready = FLAG_UNUSED;
> >>+ CURRENT_PAGE_FLAG(i).ready = FLAG_UNUSED;
> >> end_count++;
> >> continue;
> >> }
> >>@@ -7449,7 +7501,7 @@ write_kdump_pages_parallel_cyclic(struct cache_data *cd_header,
> >> * If the page_flag_buf is not ready, the pfn recorded may be changed.
> >> * So we should recheck.
> >> */
> >>- if (info->page_flag_buf[consuming]->ready != FLAG_READY) {
> >>+ if (CURRENT_PAGE_FLAG(consuming).ready != FLAG_READY) {
> >> gettimeofday(&new, NULL);
> >> if (new.tv_sec - last.tv_sec > WAIT_TIME) {
> >> ERRMSG("Can't get data of pfn.\n");
> >>@@ -7458,7 +7510,7 @@ write_kdump_pages_parallel_cyclic(struct cache_data *cd_header,
> >> continue;
> >> }
> >>
> >>- if (current_pfn == info->page_flag_buf[consuming]->pfn)
> >>+ if (current_pfn == CURRENT_PAGE_FLAG(consuming).pfn)
> >> break;
> >> }
> >>
> >>@@ -7468,12 +7520,12 @@ write_kdump_pages_parallel_cyclic(struct cache_data *cd_header,
> >> num_dumped++;
> >>
> >>
> >>- if (info->page_flag_buf[consuming]->zero == TRUE) {
> >>+ if (CURRENT_PAGE_FLAG(consuming).zero == TRUE) {
> >> if (!write_cache(cd_header, pd_zero, sizeof(page_desc_t)))
> >> goto out;
> >> pfn_zero++;
> >> } else {
> >>- index = info->page_flag_buf[consuming]->index;
> >>+ index = CURRENT_PAGE_FLAG(consuming).index;
> >> pd.flags = page_data_buf[index].flags;
> >> pd.size = page_data_buf[index].size;
> >> pd.page_flags = 0;
> >>@@ -7491,8 +7543,9 @@ write_kdump_pages_parallel_cyclic(struct cache_data *cd_header,
> >> goto out;
> >> page_data_buf[index].used = FALSE;
> >> }
> >>- info->page_flag_buf[consuming]->ready = FLAG_UNUSED;
> >>- info->page_flag_buf[consuming] = info->page_flag_buf[consuming]->next;
> >>+ CURRENT_PAGE_FLAG(consuming).ready = FLAG_UNUSED;
> >>+ info->page_flag_list[consuming].current += 1;
> >>+ info->page_flag_list[consuming].current %= info->num_buffers;
> >> }
> >> finish:
> >> ret = TRUE;
> >>diff --git a/makedumpfile.h b/makedumpfile.h
> >>index 4b315c0..8c4bc1a 100644
> >>--- a/makedumpfile.h
> >>+++ b/makedumpfile.h
> >>@@ -996,7 +996,12 @@ struct page_flag {
> >> char zero;
> >> char ready;
> >> short index;
> >>- struct page_flag *next;
> >>+// struct page_flag *next;
> >>+};
> >>+
> >>+struct page_flag_list {
> >>+ struct page_flag *header;
> >>+ int current;
> >> };
> >>
> >> struct page_data
> >>@@ -1012,7 +1017,7 @@ struct thread_args {
> >> unsigned long len_buf_out;
> >> struct cycle *cycle;
> >> struct page_data *page_data_buf;
> >>- struct page_flag *page_flag_buf;
> >>+ struct page_flag_list *page_flag_list;
> >> };
> >>
> >> /*
> >>@@ -1298,10 +1303,11 @@ struct DumpInfo {
> >> */
> >> int num_threads;
> >> int num_buffers;
> >>+ void *parallel_area;
> >> pthread_t **threads;
> >> struct thread_args *kdump_thread_args;
> >> struct page_data *page_data_buf;
> >>- struct page_flag **page_flag_buf;
> >>+ struct page_flag_list *page_flag_list;
> >> sem_t page_flag_buf_sem;
> >> pthread_rwlock_t usemmap_rwlock;
> >> mdf_pfn_t current_pfn;
> >>--
> >>1.8.3.1
> >>
>
>
>
> From 1dbf68c21a2bbc7b454c1a742c1e3ff00bb85829 Mon Sep 17 00:00:00 2001
> From: Zhou Wenjian <zhouwj-fnst at cn.fujitsu.com>
> Date: Fri, 18 Mar 2016 13:36:57 +0800
> Subject: [PATCH] remove sem
>
> ---
> makedumpfile.c | 8 ++++----
> makedumpfile.h | 4 ++--
> 2 files changed, 6 insertions(+), 6 deletions(-)
>
> diff --git a/makedumpfile.c b/makedumpfile.c
> index 2b0864a..8de5e1d 100644
> --- a/makedumpfile.c
> +++ b/makedumpfile.c
> @@ -7211,7 +7211,7 @@ kdump_thread_function_cyclic(void *arg) {
> page_flag_buf->pfn = pfn;
> page_flag_buf->ready = FLAG_FILLING;
> pthread_mutex_unlock(&info->current_pfn_mutex);
> - sem_post(&info->page_flag_buf_sem);
> +// sem_post(&info->page_flag_buf_sem);
>
> if (pfn >= cycle->end_pfn) {
> info->current_pfn = cycle->end_pfn;
> @@ -7370,7 +7370,7 @@ write_kdump_pages_parallel_cyclic(struct cache_data *cd_header,
> page_buf_num = info->num_buffers;
> page_data_buf = info->page_data_buf;
> pthread_mutex_init(&info->page_data_mutex, NULL);
> - sem_init(&info->page_flag_buf_sem, 0, 0);
> +// sem_init(&info->page_flag_buf_sem, 0, 0);
>
> for (i = 0; i < page_buf_num; i++)
> page_data_buf[i].used = FALSE;
> @@ -7405,7 +7405,7 @@ write_kdump_pages_parallel_cyclic(struct cache_data *cd_header,
> * The main thread is the consumer. It will find the next pfn and write it into file.
> * The next pfn is smallest pfn in all page_flag_buf.
> */
> - sem_wait(&info->page_flag_buf_sem);
> +// sem_wait(&info->page_flag_buf_sem);
> gettimeofday(&last, NULL);
> while (1) {
> current_pfn = end_pfn;
> @@ -7532,7 +7532,7 @@ out:
> }
> }
>
> - sem_destroy(&info->page_flag_buf_sem);
> +// sem_destroy(&info->page_flag_buf_sem);
> pthread_rwlock_destroy(&info->usemmap_rwlock);
> pthread_mutex_destroy(&info->filter_mutex);
> pthread_mutex_destroy(&info->current_pfn_mutex);
> diff --git a/makedumpfile.h b/makedumpfile.h
> index 4b315c0..7627286 100644
> --- a/makedumpfile.h
> +++ b/makedumpfile.h
> @@ -44,7 +44,7 @@
> #include "print_info.h"
> #include "sadump_mod.h"
> #include <pthread.h>
> -#include <semaphore.h>
> +//#include <semaphore.h>
>
> /*
> * Result of command
> @@ -1302,7 +1302,7 @@ struct DumpInfo {
> struct thread_args *kdump_thread_args;
> struct page_data *page_data_buf;
> struct page_flag **page_flag_buf;
> - sem_t page_flag_buf_sem;
> +// sem_t page_flag_buf_sem;
> pthread_rwlock_t usemmap_rwlock;
> mdf_pfn_t current_pfn;
> pthread_mutex_t current_pfn_mutex;
> --
> 1.8.3.1
>
