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Kernel: Invalidate file-backed VMO's when inodes are written.

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The current strategy is simply to nuke all physical pages and force
reload them from disk. This is obviously not optimal and should eventually
be optimized. It should be fairly straightforward.
This commit is contained in:
Andreas Kling
2019-02-05 08:17:46 +01:00
parent af21a45b1a
commit ca16d9d98e
7 changed files with 117 additions and 11 deletions
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5
Kernel/Ext2FileSystem.cpp
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@@ -484,6 +484,7 @@ ssize_t Ext2FSInode::write_bytes(off_t offset, size_t count, const byte* data, F
ASSERT(offset >= 0);
const size_t block_size = fs().block_size();
size_t old_size = size();
size_t new_size = max(static_cast<size_t>(offset) + count, size());
unsigned blocks_needed_before = ceil_div(size(), block_size);
@@ -557,6 +558,10 @@ ssize_t Ext2FSInode::write_bytes(off_t offset, size_t count, const byte* data, F
// NOTE: Make sure the cached block list is up to date!
m_block_list = move(block_list);
if (old_size != new_size)
inode_size_changed(old_size, new_size);
inode_contents_changed(offset, count, data);
return nwritten;
}