Re: [PATCH v2] fs/select: add vmalloc fallback for select(2)
From: Eric Dumazet <hidden>
Date: 2016-09-27 01:38:44
Also in:
linux-fsdevel, linux-mm, lkml
On Mon, 2016-09-26 at 17:01 -0700, Andrew Morton wrote:
I don't share Eric's concerns about performance here. If the vmalloc() is called, we're about to write to that quite large amount of memory which we just allocated, and the vmalloc() overhead will be relatively low.
I did not care of the performance of this particular select() system call really, but other cpus because of more TLB invalidations. At least CONFIG_DEBUG_PAGEALLOC=y builds should be impacted, but maybe we do not care. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>