On 04/10, Chao Yu wrote: > Hi Jaegeuk, > > On 2018/4/8 16:13, Chao Yu wrote: > > f2fs doesn't allow abuse on atomic write class interface, so except > > limiting in-mem pages' total memory usage capacity, we need to limit > > start-commit time as well, otherwise we may run into infinite loop > > during foreground GC because target blocks in victim segment are > > belong to atomic opened file for long time. > > > > Now, we will check the condition with f2fs_balance_fs_bg in > > background threads, once if user doesn't commit data exceeding 30 > > seconds, we will drop all cached data, so I expect it can keep our > > system running safely to prevent Dos attack. > > Is it worth to add this patch to avoid abuse on atomic write interface by > user?
Hmm, hope to see a real problem first in this case. > Thanks,
