Re: Potential Linux Crash: WARNING in ext4_dirty_folio in Linux kernel v6.13-rc5

[Matthew Wilcox]

On Fri, Apr 04, 2025 at 11:09:37AM +0200, Vlastimil Babka wrote:
> On 4/3/25 19:12, Matthew Wilcox wrote:
> > Ideas still on the table:
> > 
> >  - Convert all filesystems to use the XFS inode management scheme.
> >    Nobody is thrilled by this large amount of work.
> >  - Find a simpler version of the XFS scheme to implement for other
> >    filesystems.
> 
> I don't know the XFS scheme, but this situation seems like a match for the
> mempool semantics? (I assume it's also a lot of work to implement)

Ah; no.  evicting an inode may consume an arbitrary amount of memory,
run transactions, wait for I/O, etc, etc.  We really shouldn't be doing
it as part of memory reclaim.  I should probably have said that as part
of this writeup, so thanks for bringing it up.