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Kernel: Do timekeeping manually instead of asking the RTC all the time.

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This introduces a tiny amount of timer drift which I will have to fix
somehow eventually, but it's a huge improvement in timing consistency
as we no longer suddenly jump from e.g 10:45:49.123 to 10:45:50.000.
This commit is contained in:
Andreas Kling
2019-03-25 02:06:57 +01:00
parent 20f7d7ec67
commit ab11f42094
5 changed files with 34 additions and 21 deletions
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13
Kernel/Ext2FileSystem.cpp
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@@ -317,7 +317,9 @@ void Ext2FS::free_inode(Ext2FSInode& inode)
ASSERT(inode.m_raw_inode.i_links_count == 0);
dbgprintf("Ext2FS: inode %u has no more links, time to delete!\n", inode.index());
inode.m_raw_inode.i_dtime = RTC::now();
struct timeval now;
kgettimeofday(now);
inode.m_raw_inode.i_dtime = now.tv_sec;
write_ext2_inode(inode.index(), inode.m_raw_inode);
auto block_list = block_list_for_inode(inode.m_raw_inode, true);
@@ -1178,16 +1180,17 @@ RetainPtr<Inode> Ext2FS::create_inode(InodeIdentifier parent_id, const String& n
else
initial_links_count = 1;
auto timestamp = RTC::now();
struct timeval now;
kgettimeofday(now);
ext2_inode e2inode;
memset(&e2inode, 0, sizeof(ext2_inode));
e2inode.i_mode = mode;
e2inode.i_uid = current->process().euid();
e2inode.i_gid = current->process().egid();
e2inode.i_size = size;
e2inode.i_atime = timestamp;
e2inode.i_ctime = timestamp;
e2inode.i_mtime = timestamp;
e2inode.i_atime = now.tv_sec;
e2inode.i_ctime = now.tv_sec;
e2inode.i_mtime = now.tv_sec;
e2inode.i_dtime = 0;
e2inode.i_links_count = initial_links_count;