Re: [PATCH 1/2] f2fs: use vmalloc instead of kvmalloc in .init_{,de}compress_ctx

[Chao Yu <chao@kernel.org>]

On 5/13/25 14:01, Christoph Hellwig wrote:
> On Tue, May 13, 2025 at 01:57:20PM +0800, Chao Yu wrote:
>> .init_{,de}compress_ctx uses kvmalloc() to alloc memory, it will try
>> to allocate physically continuous page first, it may cause more memory
>> allocation pressure, let's use vmalloc instead to mitigate it.
> 
> Shouldn't this be handled in kvmalloc instead of working around it in
> callers?

kvmalloc() will allocate physically continuous page first, so it may race
w/ other physically continuous page allocator who uses kmalloc(), in
scenario of there are few physically continuous pages.

Thanks,