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fix get_big_block bug, try to fix overallocation of memory

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This commit is contained in:
Richard Holland
2024-08-19 13:20:06 +10:00
parent b0a7783dbc
commit 9320f0fddc
1 changed files with 9 additions and 15 deletions
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24
src/ripple/nodestore/backend/snug.hpp
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@@ -12,6 +12,8 @@
#include <sys/stat.h>
#include <unistd.h>
#include <vector>
#define MMAPFLAGS (PROT_READ | PROT_WRITE | MAP_NORESERVE), MAP_SHARED
namespace snug {
int
@@ -158,7 +160,11 @@ private:
{
// no free blocks, allocate a new one
uint64_t next_block = *((uint64_t*)big_file);
*((uint64_t*)(big_file)) += 32768;
// special edge case, first block ever allocated:
if (!next_block)
next_block += 32768;
*((uint64_t*)(big_file)) = next_block + 32768;
if (next_block + 32768 > BIGSIZE)
return 0;
@@ -481,13 +487,7 @@ private:
"Unable to get file stats: " + full_path);
}
void* mapped = mmap(
nullptr,
file_stat.st_size,
PROT_READ | PROT_WRITE,
MAP_SHARED,
fd,
0);
void* mapped = mmap(nullptr, file_stat.st_size, MMAPFLAGS, fd, 0);
close(fd); // Can close fd after mmap
if (mapped == MAP_FAILED)
@@ -519,13 +519,7 @@ private:
"Unable to get file stats: " + new_file);
}
void* mapped = mmap(
nullptr,
file_stat.st_size,
PROT_READ | PROT_WRITE,
MAP_SHARED,
fd,
0);
void* mapped = mmap(nullptr, file_stat.st_size, MMAPFLAGS, fd, 0);
close(fd); // Can close fd after mmap
if (mapped == MAP_FAILED)