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mem: Move shmem preparation routine and rename

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We'll collect VmaEntries early before fork.

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This commit is contained in:
Pavel Emelyanov
2014-02-03 15:12:08 +04:00
parent c643ed76e7
commit 0786f831d7
5 changed files with 47 additions and 41 deletions
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40
mem.c
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@@ -15,6 +15,8 @@
#include "kerndat.h"
#include "stats.h"
#include "vma.h"
#include "shmem.h"
#include "pstree.h"
#include "protobuf.h"
#include "protobuf/pagemap.pb-c.h"
@@ -338,3 +340,41 @@ int parasite_dump_pages_seized(struct parasite_ctl *ctl,
return ret;
}
int prepare_mm_pid(struct pstree_item *i)
{
pid_t pid = i->pid.virt;
int fd, ret = -1;
VmaEntry *vi;
fd = open_image(CR_FD_VMAS, O_RSTR, pid);
if (fd < 0) {
if (errno == ENOENT)
return 0;
else
return -1;
}
while (1) {
ret = pb_read_one_eof(fd, &vi, PB_VMA);
if (ret <= 0)
break;
pr_info("vma 0x%"PRIx64" 0x%"PRIx64"\n", vi->start, vi->end);
if (!vma_entry_is(vi, VMA_ANON_SHARED) ||
vma_entry_is(vi, VMA_AREA_SYSVIPC)) {
vma_entry__free_unpacked(vi, NULL);
continue;
}
ret = collect_shmem(pid, vi);
vma_entry__free_unpacked(vi, NULL);
if (ret)
break;
}
close(fd);
return ret;
}