Re: [PATCH RFC 0/8] dcache: increase poison resistance

Hi Konstantin, How would you like to proceed with this patch set? This patchset as it is already fixed the customer issue we faced, it will stop memory fragmentation causing by negative dentry and no performance regression through our test. In production workload, it is common that some app k

Re: [PATCH RFC 0/8] dcache: increase poison resistance

On 12/13/20 11:43 PM, Konstantin Khlebnikov wrote: On Sun, Dec 13, 2020 at 9:52 PM Junxiao Bi > wrote: On 12/11/20 11:32 PM, Konstantin Khlebnikov wrote: > On Thu, Dec 10, 2020 at 2:01 AM Junxiao Bi mailto:junxiao...@oracle.com> >

Re: [PATCH RFC 0/8] dcache: increase poison resistance

On 12/11/20 11:32 PM, Konstantin Khlebnikov wrote: On Thu, Dec 10, 2020 at 2:01 AM Junxiao Bi > wrote: Hi Konstantin, We tested this patch set recently and found it limiting negative dentry to a small part of total memory. And also we don't see any

Re: [PATCH RFC 0/8] dcache: increase poison resistance

Hi Konstantin, We tested this patch set recently and found it limiting negative dentry to a small part of total memory. And also we don't see any performance regression on it. Do you have any plan to integrate it into mainline? It will help a lot on memory fragmentation issue causing by dentry

[PATCH RFC 0/8] dcache: increase poison resistance

For most filesystems result of every negative lookup is cached, content of directories is usually cached too. Production of negative dentries isn't limited with disk speed. It's really easy to generate millions of them if system has enough memory. Getting this memory back ins't that easy because s