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Kernel: Add a write cache to DiskBackedFS.

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This way you can spam small write()s on a file without the kernel writing
to disk every single time. Flushes are included in the FS::sync() operation
and will get triggered regularly by syncd. :^)
This commit is contained in:
Andreas Kling 2019-04-25 22:05:53 +02:00
parent e0cdc5db0d
commit 44673c4f3b
5 changed files with 49 additions and 13 deletions
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12
Kernel/FileSystem/FileSystem.cpp
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@ -144,7 +144,7 @@ int Inode::decrement_link_count()
void FS::sync()
{
Vector<Retained<Inode>> inodes;
Vector<Retained<Inode>, 32> inodes;
{
InterruptDisabler disabler;
for (auto* inode : all_inodes()) {
@ -157,6 +157,16 @@ void FS::sync()
ASSERT(inode->is_metadata_dirty());
inode->flush_metadata();
}
Vector<Retained<FS>, 32> fses;
{
InterruptDisabler disabler;
for (auto& it : all_fses())
fses.append(*it.value);
}
for (auto fs : fses)
fs->flush_writes();
}
void Inode::set_vmo(VMObject& vmo)